Reorganize and update Dockerfile

Dockerfile

@@ -1,13 +1,20 @@
-FROM golang:1.14-alpine
+FROM golang:1.14-alpine as dev
 
 WORKDIR /go/src/Goff
 COPY ./go.mod .
+COPY ./go.sum .
 
-RUN apk add --no-cache git
+RUN go mod download
-
-RUN go get -d -v ./...
 
 COPY . .
-RUN go install -v ./...
+RUN go install github.com/dustinpianalto/goff
+
+CMD [ "go", "run", "goff.go"]
+
+from alpine
+
+WORKDIR /bin
+
+COPY --from=dev /go/bin/goff ./goff
 
-ENTRYPOINT /go/bin/goff
+CMD [ "goff" ]

events/member_events.go

@@ -0,0 +1,135 @@
+package events
+
+import (
+	"fmt"
+	"log"
+	"strconv"
+	"time"
+
+	"github.com/bwmarrin/discordgo"
+	"github.com/dustinpianalto/goff/utils"
+)
+
+func OnGuildMemberAddLogging(s *discordgo.Session, member *discordgo.GuildMemberAdd) {
+	defer func() {
+		if r := recover(); r != nil {
+			log.Println("Recovered from panic in OnGuildMemberAddLogging", r)
+		}
+	}()
+	var channelID string
+	row := utils.Database.QueryRow("SELECT logging_channel FROM guilds where id=$1", member.GuildID)
+	err := row.Scan(&channelID)
+	if err != nil || channelID == "" {
+		return
+	}
+	guild, err := s.State.Guild(member.GuildID)
+	if err != nil {
+		log.Println(err)
+		return
+	}
+
+	var title string
+	if member.User.Bot {
+		title = "Bot Joined"
+	} else {
+		title = "Member Joined"
+	}
+
+	thumb := &discordgo.MessageEmbedThumbnail{
+		URL: member.User.AvatarURL(""),
+	}
+
+	int64ID, _ := strconv.ParseInt(member.User.ID, 10, 64)
+	snow := utils.ParseSnowflake(int64ID)
+
+	field := &discordgo.MessageEmbedField{
+		Name:   "User was created:",
+		Value:  utils.ParseDateString(snow.CreationTime),
+		Inline: false,
+	}
+
+	joinTime, _ := member.JoinedAt.Parse()
+
+	embed := &discordgo.MessageEmbed{
+		Title:       title,
+		Description: fmt.Sprintf("%v (%v) Has Joined the Server", member.User.Mention(), member.User.ID),
+		Color:       0x0cc56a,
+		Thumbnail:   thumb,
+		Footer: &discordgo.MessageEmbedFooter{
+			Text:    fmt.Sprintf("Current Member Count: %v", guild.MemberCount),
+			IconURL: guild.IconURL(),
+		},
+		Timestamp: joinTime.Format(time.RFC3339),
+		Fields:    []*discordgo.MessageEmbedField{field},
+	}
+	s.ChannelMessageSendEmbed(channelID, embed)
+}
+
+func OnGuildMemberRemoveLogging(s *discordgo.Session, member *discordgo.GuildMemberRemove) {
+	defer func() {
+		if r := recover(); r != nil {
+			log.Println("Recovered from panic in OnGuildMemberAddLogging", r)
+		}
+	}()
+	timeNow := time.Now()
+	var channelID string
+	row := utils.Database.QueryRow("SELECT logging_channel FROM guilds where id=$1", member.GuildID)
+	err := row.Scan(&channelID)
+	if err != nil || channelID == "" {
+		return
+	}
+	guild, err := s.State.Guild(member.GuildID)
+	if err != nil {
+		log.Println(err)
+		return
+	}
+
+	var title string
+	if member.User.Bot {
+		title = "Bot Left"
+	} else {
+		title = "Member Left"
+	}
+
+	thumb := &discordgo.MessageEmbedThumbnail{
+		URL: member.User.AvatarURL(""),
+	}
+
+	desc := ""
+	al, err := s.GuildAuditLog(member.GuildID, "", "", 20, 1)
+	if err != nil {
+		log.Println(err)
+	} else {
+		for _, log := range al.AuditLogEntries {
+			if log.TargetID == member.User.ID {
+				int64ID, _ := strconv.ParseInt(log.ID, 10, 64)
+				logSnow := utils.ParseSnowflake(int64ID)
+				if timeNow.Sub(logSnow.CreationTime).Seconds() <= 10 {
+					user, err := s.User(log.UserID)
+					if err == nil {
+						desc = fmt.Sprintf("%v (%v) was Kicked by: %v\nReason: %v", member.User.String(), member.User.ID, user.String(), log.Reason)
+					} else {
+						desc = fmt.Sprintf("%v (%v) was Kicked by: %v\nReason: %v", member.User.String(), member.User.ID, log.UserID, log.Reason)
+					}
+					break
+				}
+			}
+		}
+	}
+	if desc == "" {
+		desc = fmt.Sprintf("%v (%v) Has Left the Server", member.User.String(), member.User.ID)
+	}
+
+	embed := &discordgo.MessageEmbed{
+		Title:       title,
+		Description: desc,
+		Color:       0xff9431,
+		Thumbnail:   thumb,
+		Footer: &discordgo.MessageEmbedFooter{
+			Text:    fmt.Sprintf("Current Member Count: %v", guild.MemberCount),
+			IconURL: guild.IconURL(),
+		},
+		Timestamp: timeNow.Format(time.RFC3339),
+	}
+	s.ChannelMessageSendEmbed(channelID, embed)
+}

events/message_events.go

@@ -0,0 +1,97 @@
+package events
+
+import (
+	"fmt"
+	"log"
+
+	"github.com/bwmarrin/discordgo"
+	"github.com/dustinpianalto/goff/utils"
+)
+
+func OnMessageUpdate(session *discordgo.Session, m *discordgo.MessageUpdate) {
+	defer func() {
+		if r := recover(); r != nil {
+			log.Println("Recovered from panic in OnMessageUpdate", r)
+		}
+	}()
+	msg := m.BeforeUpdate
+	if msg.Author.Bot {
+		return
+	}
+	var channelID string
+	row := utils.Database.QueryRow("SELECT logging_channel FROM guilds where id=$1", msg.GuildID)
+	err := row.Scan(&channelID)
+	if err != nil || channelID == "" {
+		return
+	}
+	channel, err := session.State.Channel(msg.ChannelID)
+	if err != nil {
+		log.Println(err)
+		return
+	}
+	embed := &discordgo.MessageEmbed{
+		Title:       fmt.Sprintf("Message Edited: %v", msg.ID),
+		Description: fmt.Sprintf("**Before:** %v\n**After:** %v\nIn Channel: %v", msg.Content, m.Content, channel.Mention()),
+		Color:       session.State.UserColor(msg.Author.ID, channelID),
+		Footer: &discordgo.MessageEmbedFooter{
+			Text:    fmt.Sprintf("Author: %v", msg.Author.String()),
+			IconURL: msg.Author.AvatarURL(""),
+		},
+	}
+	session.ChannelMessageSendEmbed(channelID, embed)
+}
+
+func OnMessageDelete(session *discordgo.Session, m *discordgo.MessageDelete) {
+	defer func() {
+		if r := recover(); r != nil {
+			log.Println("Recovered from panic in OnMessageDelete", r)
+		}
+	}()
+	msg := m.BeforeDelete
+	if msg == nil {
+		log.Printf("Message Deleted but the original message was not in my cache so we are ignoring it.\nMessage ID: %v\nGuild ID: %v\nChannel ID: %v\n", m.ID, m.GuildID, m.ChannelID)
+		return
+	}
+	if msg.Author.Bot {
+		return
+	}
+	var channelID string
+	row := utils.Database.QueryRow("SELECT logging_channel FROM guilds where id=$1", msg.GuildID)
+	err := row.Scan(&channelID)
+	if err != nil || channelID == "" {
+		return
+	}
+	channel, err := session.State.Channel(msg.ChannelID)
+	if err != nil {
+		log.Println(err)
+		return
+	}
+	desc := ""
+	al, err := session.GuildAuditLog(msg.GuildID, "", "", 72, 1)
+	if err != nil {
+		log.Println(err)
+	} else {
+		for _, log := range al.AuditLogEntries {
+			if log.TargetID == msg.Author.ID && log.Options.ChannelID == msg.ChannelID {
+				user, err := session.User(log.UserID)
+				if err == nil {
+					desc = fmt.Sprintf("**Content:** %v\nIn Channel: %v\nDeleted By: %v", msg.Content, channel.Mention(), user.Mention())
+				}
+				break
+			}
+		}
+	}
+	if desc == "" {
+		desc = fmt.Sprintf("**Content:** %v\nIn Channel: %v", msg.Content, channel.Mention())
+	}
+	embed := &discordgo.MessageEmbed{
+		Title:       fmt.Sprintf("Message Deleted: %v", msg.ID),
+		Description: desc,
+		Color:       session.State.UserColor(msg.Author.ID, channelID),
+		Footer: &discordgo.MessageEmbedFooter{
+			Text:    fmt.Sprintf("Author: %v", msg.Author.String()),
+			IconURL: msg.Author.AvatarURL(""),
+		},
+	}
+	session.ChannelMessageSendEmbed(channelID, embed)
+}

exts/P_interpreter.go

@@ -0,0 +1,84 @@
+package exts
+
+import (
+	"errors"
+	"fmt"
+	"github.com/dustinpianalto/disgoman"
+	"strings"
+)
+
+func pCommand(ctx disgoman.Context, args []string) {
+	input := strings.Join(args, "")
+	const LENGTH = 1999
+	var mem [LENGTH]byte
+	pointer := 0
+	l := 0
+	for i := 0; i < len(input); i++ {
+		if input[i] == 'L' {
+			if pointer == 0 {
+				pointer = LENGTH - 1
+			} else {
+				pointer--
+			}
+		} else if input[i] == 'R' {
+			if pointer == LENGTH-1 {
+				pointer = 0
+			} else {
+				pointer++
+			}
+		} else if input[i] == '+' {
+			mem[pointer]++
+		} else if input[i] == '-' {
+			mem[pointer]--
+		} else if input[i] == '(' {
+			if mem[pointer] == 0 {
+				i++
+				for l > 0 || input[i] != ')' {
+					if input[i] == '(' {
+						l++
+					}
+					if input[i] == ')' {
+						l--
+					}
+					i++
+				}
+			}
+		} else if input[i] == ')' {
+			if mem[pointer] != 0 {
+				i--
+				for l > 0 || input[i] != '(' {
+					if input[i] == ')' {
+						l++
+					}
+					if input[i] == '(' {
+						l--
+					}
+					i--
+				}
+			}
+		} else {
+			ctx.ErrorChannel <- disgoman.CommandError{
+				Context: ctx,
+				Message: fmt.Sprintf("Invalid Character: %v", input[i]),
+				Error:   errors.New("invalid character"),
+			}
+			return
+		}
+	}
+	var out []byte
+	for _, i := range mem {
+		if i != 0 {
+			out = append(out, i)
+		}
+	}
+	_, err := ctx.Send(string(out))
+	if err != nil {
+		ctx.ErrorChannel <- disgoman.CommandError{
+			Context: ctx,
+			Message: "Couldn't send results",
+			Error:   err,
+		}
+		return
+	}
+	return
+}

exts/fun.go

@@ -0,0 +1,84 @@
+package exts
+
+import (
+	"fmt"
+	"strconv"
+	"strings"
+
+	"github.com/dustinpianalto/disgoman"
+	"github.com/dustinpianalto/rpnparse"
+)
+
+func interleave(ctx disgoman.Context, args []string) {
+	if len(args) == 2 {
+		x, err := strconv.ParseInt(args[0], 10, 64)
+		if err != nil {
+			return
+		}
+		y, err := strconv.ParseInt(args[1], 10, 64)
+		if err != nil {
+			return
+		}
+		var z = int64(0)
+		for i := 0; i < 64; i++ {
+			x_masked_i := x & (1 << i)
+			y_masked_i := y & (1 << i)
+
+			z |= x_masked_i << i
+			z |= y_masked_i << (i + 1)
+		}
+		ctx.Send(fmt.Sprintf("%v", z))
+	}
+}
+
+func deinterleave(ctx disgoman.Context, args []string) {
+	if len(args) == 1 {
+		z, err := strconv.ParseInt(args[0], 10, 64)
+		if err != nil {
+			return
+		}
+		var x = int64(0)
+		var y = int64(0)
+		i := 0
+		for z > 0 {
+			x |= (z & 1) << i
+			z >>= 1
+			y |= (z & 1) << i
+			z >>= 1
+			i++
+		}
+		ctx.Send(fmt.Sprintf("(%v, %v)", x, y))
+	}
+}
+
+func generateRPNCommand(ctx disgoman.Context, args []string) {
+	rpn, err := rpnparse.GenerateRPN(args)
+	if err != nil {
+		ctx.Send(err.Error())
+		return
+	}
+	ctx.Send(rpn)
+}
+
+func parseRPNCommand(ctx disgoman.Context, args []string) {
+	res, err := rpnparse.ParseRPN(args)
+	if err != nil {
+		ctx.Send(err.Error())
+		return
+	}
+	ctx.Send(fmt.Sprintf("The result is: %v", res))
+}
+
+func solveCommand(ctx disgoman.Context, args []string) {
+	rpn, err := rpnparse.GenerateRPN(args)
+	if err != nil {
+		ctx.Send(err.Error())
+		return
+	}
+	res, err := rpnparse.ParseRPN(strings.Split(rpn, " "))
+	if err != nil {
+		ctx.Send(err.Error())
+		return
+	}
+	ctx.Send(fmt.Sprintf("The result is: %v", res))
+}

exts/guild.go

@@ -0,0 +1,290 @@
+package exts
+
+import (
+	"fmt"
+	"strings"
+
+	"github.com/dustinpianalto/disgoman"
+	"github.com/dustinpianalto/goff/utils"
+)
+
+// Guild management commands
+
+func loggingChannel(ctx disgoman.Context, args []string) {
+	var idString string
+	if len(args) > 0 {
+		idString = args[0]
+		if strings.HasPrefix(idString, "<#") && strings.HasSuffix(idString, ">") {
+			idString = idString[2 : len(idString)-1]
+		}
+	} else {
+		idString = ""
+	}
+	fmt.Println(idString)
+	if idString == "" {
+		_, err := utils.Database.Exec("UPDATE guilds SET logging_channel='' WHERE id=$1;", ctx.Guild.ID)
+		if err != nil {
+			ctx.ErrorChannel <- disgoman.CommandError{
+				Context: ctx,
+				Message: "Error Updating Database",
+				Error:   err,
+			}
+			return
+		}
+		_, _ = ctx.Send("Logging Channel Updated.")
+		return
+	}
+	channel, err := ctx.Session.State.Channel(idString)
+	if err != nil {
+		ctx.ErrorChannel <- disgoman.CommandError{
+			Context: ctx,
+			Message: "Can't find that channel.",
+			Error:   err,
+		}
+		return
+	}
+	if channel.GuildID != ctx.Guild.ID {
+		ctx.ErrorChannel <- disgoman.CommandError{
+			Context: ctx,
+			Message: "The channel passed is not in this guild.",
+			Error:   err,
+		}
+		return
+	}
+	_, err = utils.Database.Exec("UPDATE guilds SET logging_channel=$1 WHERE id=$2;", idString, ctx.Guild.ID)
+	if err != nil {
+		ctx.ErrorChannel <- disgoman.CommandError{
+			Context: ctx,
+			Message: "Error Updating Database",
+			Error:   err,
+		}
+		return
+	}
+	_, _ = ctx.Send("Logging Channel Updated.")
+}
+
+func getLoggingChannel(ctx disgoman.Context, _ []string) {
+	var channelID string
+	row := utils.Database.QueryRow("SELECT logging_channel FROM guilds where id=$1", ctx.Guild.ID)
+	err := row.Scan(&channelID)
+	if err != nil {
+		fmt.Println(err)
+		ctx.ErrorChannel <- disgoman.CommandError{
+			Context: ctx,
+			Message: "Error getting data from the database.",
+			Error:   err,
+		}
+		return
+	}
+	if channelID == "" {
+		_, _ = ctx.Send("The logging channel is not set.")
+		return
+	}
+	channel, err := ctx.Session.State.GuildChannel(ctx.Guild.ID, channelID)
+	if err != nil {
+		fmt.Println(err)
+		ctx.ErrorChannel <- disgoman.CommandError{
+			Context: ctx,
+			Message: "I got the channel ID but it does not appear to be a valid channel in this guild.",
+			Error:   err,
+		}
+		return
+	}
+	_, _ = ctx.Send(fmt.Sprintf("The logging channel is currently %s", channel.Mention()))
+	return
+}
+
+func welcomeChannel(ctx disgoman.Context, args []string) {
+	var idString string
+	if len(args) > 0 {
+		idString = args[0]
+		if strings.HasPrefix(idString, "<#") && strings.HasSuffix(idString, ">") {
+			idString = idString[2 : len(idString)-1]
+		}
+	} else {
+		idString = ""
+	}
+	fmt.Println(idString)
+	if idString == "" {
+		_, err := utils.Database.Exec("UPDATE guilds SET welcome_channel='' WHERE id=$1;", ctx.Guild.ID)
+		if err != nil {
+			ctx.ErrorChannel <- disgoman.CommandError{
+				Context: ctx,
+				Message: "Error Updating Database",
+				Error:   err,
+			}
+			return
+		}
+		_, _ = ctx.Send("Welcomer Disabled.")
+		return
+	}
+	channel, err := ctx.Session.State.Channel(idString)
+	if err != nil {
+		ctx.ErrorChannel <- disgoman.CommandError{
+			Context: ctx,
+			Message: "Can't find that channel.",
+			Error:   err,
+		}
+		return
+	}
+	if channel.GuildID != ctx.Guild.ID {
+		ctx.ErrorChannel <- disgoman.CommandError{
+			Context: ctx,
+			Message: "The channel passed is not in this guild.",
+			Error:   err,
+		}
+		return
+	}
+	_, err = utils.Database.Exec("UPDATE guilds SET welcome_channel=$1 WHERE id=$2;", idString, ctx.Guild.ID)
+	if err != nil {
+		ctx.ErrorChannel <- disgoman.CommandError{
+			Context: ctx,
+			Message: "Error Updating Database",
+			Error:   err,
+		}
+		return
+	}
+	_, _ = ctx.Send("Welcome Channel Updated.")
+	return
+}
+
+func getWelcomeChannel(ctx disgoman.Context, _ []string) {
+	var channelID string
+	row := utils.Database.QueryRow("SELECT welcome_channel FROM guilds where id=$1", ctx.Guild.ID)
+	err := row.Scan(&channelID)
+	if err != nil {
+		fmt.Println(err)
+		ctx.ErrorChannel <- disgoman.CommandError{
+			Context: ctx,
+			Message: "Error getting data from the database.",
+			Error:   err,
+		}
+		return
+	}
+	if channelID == "" {
+		_, _ = ctx.Send("The welcomer is disabled.")
+		return
+	}
+	channel, err := ctx.Session.State.GuildChannel(ctx.Guild.ID, channelID)
+	if err != nil {
+		fmt.Println(err)
+		ctx.ErrorChannel <- disgoman.CommandError{
+			Context: ctx,
+			Message: "I got the channel ID but it does not appear to be a valid channel in this guild.",
+			Error:   err,
+		}
+		return
+	}
+	_, _ = ctx.Send(fmt.Sprintf("The welcome channel is currently %s", channel.Mention()))
+}
+
+func addGuildCommand(ctx disgoman.Context, args []string) {
+	var guildID string
+	row := utils.Database.QueryRow("SELECT id FROM guilds where id=$1", ctx.Guild.ID)
+	err := row.Scan(&guildID)
+	if err == nil {
+		ctx.ErrorChannel <- disgoman.CommandError{
+			Context: ctx,
+			Message: "This guild is already in my database",
+			Error:   err,
+		}
+		return
+	}
+
+	_, err = utils.Database.Query("INSERT INTO guilds (id) VALUES ($1)", ctx.Guild.ID)
+	if err != nil {
+		fmt.Println(err)
+		ctx.ErrorChannel <- disgoman.CommandError{
+			Context: ctx,
+			Message: "There was a problem inserting this guild into the database",
+			Error:   err,
+		}
+		return
+	}
+	_, _ = ctx.Send("This guild has been added.")
+
+}
+
+func puzzleChannel(ctx disgoman.Context, args []string) {
+	var idString string
+	if len(args) > 0 {
+		idString = args[0]
+		if strings.HasPrefix(idString, "<#") && strings.HasSuffix(idString, ">") {
+			idString = idString[2 : len(idString)-1]
+		}
+	} else {
+		idString = ""
+	}
+	fmt.Println(idString)
+	if idString == "" {
+		_, err := utils.Database.Exec("UPDATE guilds SET puzzle_channel='' WHERE id=$1;", ctx.Guild.ID)
+		if err != nil {
+			ctx.ErrorChannel <- disgoman.CommandError{
+				Context: ctx,
+				Message: "Error Updating Database",
+				Error:   err,
+			}
+			return
+		}
+		_, _ = ctx.Send("Puzzle Channel Updated.")
+		return
+	}
+	channel, err := ctx.Session.State.Channel(idString)
+	if err != nil {
+		ctx.ErrorChannel <- disgoman.CommandError{
+			Context: ctx,
+			Message: "Can't find that channel.",
+			Error:   err,
+		}
+		return
+	}
+	if channel.GuildID != ctx.Guild.ID {
+		ctx.ErrorChannel <- disgoman.CommandError{
+			Context: ctx,
+			Message: "The channel passed is not in this guild.",
+			Error:   err,
+		}
+		return
+	}
+	_, err = utils.Database.Exec("UPDATE guilds SET puzzle_channel=$1 WHERE id=$2;", idString, ctx.Guild.ID)
+	if err != nil {
+		ctx.ErrorChannel <- disgoman.CommandError{
+			Context: ctx,
+			Message: "Error Updating Database",
+			Error:   err,
+		}
+		return
+	}
+	_, _ = ctx.Send("Puzzle Channel Updated.")
+}
+
+func getPuzzleChannel(ctx disgoman.Context, _ []string) {
+	var channelID string
+	row := utils.Database.QueryRow("SELECT puzzle_channel FROM guilds where id=$1", ctx.Guild.ID)
+	err := row.Scan(&channelID)
+	if err != nil {
+		fmt.Println(err)
+		ctx.ErrorChannel <- disgoman.CommandError{
+			Context: ctx,
+			Message: "Error getting data from the database.",
+			Error:   err,
+		}
+		return
+	}
+	if channelID == "" {
+		_, _ = ctx.Send("The puzzle channel is not set.")
+		return
+	}
+	channel, err := ctx.Session.State.GuildChannel(ctx.Guild.ID, channelID)
+	if err != nil {
+		fmt.Println(err)
+		ctx.ErrorChannel <- disgoman.CommandError{
+			Context: ctx,
+			Message: "I got the channel ID but it does not appear to be a valid channel in this guild.",
+			Error:   err,
+		}
+		return
+	}
+	_, _ = ctx.Send(fmt.Sprintf("The puzzle channel is currently %s", channel.Mention()))
+	return
+}

exts/init.go

@@ -0,0 +1,234 @@
+package exts
+
+import (
+	"github.com/dustinpianalto/disgoman"
+)
+
+func AddCommandHandlers(h *disgoman.CommandManager) {
+	// Arguments:
+	// name - command name - string
+	// desc - command description - string
+	// owneronly - only allow owners to run - bool
+	// hidden - hide command from non-owners - bool
+	// perms - permissisions required - anpan.Permission (int)
+	// type - command type, sets where the command is available
+	// run - function to run - func(anpan.Context, []string) / CommandRunFunc
+	_ = h.AddCommand(&disgoman.Command{
+		Name:                "ping",
+		Aliases:             nil,
+		Description:         "Check the bot's ping",
+		OwnerOnly:           false,
+		Hidden:              false,
+		RequiredPermissions: 0,
+		Invoke:              pingCommand,
+	})
+	_ = h.AddCommand(&disgoman.Command{
+		Name:                "say",
+		Aliases:             nil,
+		Description:         "Repeat a message",
+		OwnerOnly:           false,
+		Hidden:              false,
+		RequiredPermissions: 0,
+		SanitizeEveryone:    true,
+		Invoke:              sayCommand,
+	})
+	_ = h.AddCommand(&disgoman.Command{
+		Name:                "user",
+		Aliases:             nil,
+		Description:         "Get user info",
+		OwnerOnly:           false,
+		Hidden:              false,
+		RequiredPermissions: 0,
+		Invoke:              userCommand,
+	})
+	_ = h.AddCommand(&disgoman.Command{
+		Name:                "git",
+		Aliases:             nil,
+		Description:         "Show my github link",
+		OwnerOnly:           false,
+		Hidden:              false,
+		RequiredPermissions: 0,
+		Invoke:              gitCommand,
+	})
+	_ = h.AddCommand(&disgoman.Command{
+		Name:                "tag",
+		Aliases:             nil,
+		Description:         "Get a tag",
+		OwnerOnly:           false,
+		Hidden:              false,
+		RequiredPermissions: 0,
+		Invoke:              tagCommand,
+	})
+	_ = h.AddCommand(&disgoman.Command{
+		Name:                "addtag",
+		Aliases:             nil,
+		Description:         "Add a tag",
+		OwnerOnly:           false,
+		Hidden:              false,
+		RequiredPermissions: 0,
+		SanitizeEveryone:    true,
+		Invoke:              addTagCommand,
+	})
+	_ = h.AddCommand(&disgoman.Command{
+		Name:                "invite",
+		Aliases:             nil,
+		Description:         "Get the invite link for this bot or others",
+		OwnerOnly:           false,
+		Hidden:              false,
+		RequiredPermissions: 0,
+		Invoke:              inviteCommand,
+	})
+	_ = h.AddCommand(&disgoman.Command{
+		Name:                "P",
+		Aliases:             nil,
+		Description:         "Interpret a P\" program and return the results",
+		OwnerOnly:           false,
+		Hidden:              false,
+		RequiredPermissions: 0,
+		Invoke:              pCommand,
+	})
+	_ = h.AddCommand(&disgoman.Command{
+		Name:                "set-logging-channel",
+		Aliases:             []string{"slc"},
+		Description:         "Set the channel logging messages will be sent to.",
+		OwnerOnly:           false,
+		Hidden:              false,
+		RequiredPermissions: disgoman.PermissionManageServer,
+		Invoke:              loggingChannel,
+	})
+	_ = h.AddCommand(&disgoman.Command{
+		Name:                "get-logging-channel",
+		Aliases:             []string{"glc"},
+		Description:         "Gets the channel logging messages will be sent to.",
+		OwnerOnly:           false,
+		Hidden:              false,
+		RequiredPermissions: disgoman.PermissionManageServer,
+		Invoke:              getLoggingChannel,
+	})
+	_ = h.AddCommand(&disgoman.Command{
+		Name:                "set-welcome-channel",
+		Aliases:             []string{"swc"},
+		Description:         "Set the channel welcome messages will be sent to.",
+		OwnerOnly:           false,
+		Hidden:              false,
+		RequiredPermissions: disgoman.PermissionManageServer,
+		Invoke:              welcomeChannel,
+	})
+	_ = h.AddCommand(&disgoman.Command{
+		Name:                "get-welcome-channel",
+		Aliases:             []string{"gwc"},
+		Description:         "Gets the channel welcome messages will be sent to.",
+		OwnerOnly:           false,
+		Hidden:              false,
+		RequiredPermissions: disgoman.PermissionManageServer,
+		Invoke:              getWelcomeChannel,
+	})
+	_ = h.AddCommand(&disgoman.Command{
+		Name:                "kick",
+		Aliases:             nil,
+		Description:         "Kicks the given user with the given reason",
+		OwnerOnly:           false,
+		Hidden:              false,
+		RequiredPermissions: disgoman.PermissionKickMembers,
+		Invoke:              kickUserCommand,
+	})
+	_ = h.AddCommand(&disgoman.Command{
+		Name:                "addGuild",
+		Aliases:             nil,
+		Description:         "Adds the current guild to the database",
+		OwnerOnly:           true,
+		Hidden:              false,
+		RequiredPermissions: disgoman.PermissionManageServer,
+		Invoke:              addGuildCommand,
+	})
+	_ = h.AddCommand(&disgoman.Command{
+		Name:                "ban",
+		Aliases:             []string{"ban-no-delete"},
+		Description:         "Bans the given user with the given reason",
+		OwnerOnly:           false,
+		Hidden:              false,
+		RequiredPermissions: disgoman.PermissionBanMembers,
+		Invoke:              banUserCommand,
+	})
+	_ = h.AddCommand(&disgoman.Command{
+		Name:                "unban",
+		Aliases:             nil,
+		Description:         "Unbans the given user",
+		OwnerOnly:           false,
+		Hidden:              false,
+		RequiredPermissions: disgoman.PermissionBanMembers,
+		Invoke:              unbanUserCommand,
+	})
+	_ = h.AddCommand(&disgoman.Command{
+		Name:                "remind",
+		Aliases:             nil,
+		Description:         "Remind me at a later time",
+		OwnerOnly:           false,
+		Hidden:              false,
+		RequiredPermissions: 0,
+		Invoke:              addReminderCommand,
+	})
+	_ = h.AddCommand(&disgoman.Command{
+		Name:                "encode",
+		Aliases:             []string{"e"},
+		Description:         "Encode 2 numbers",
+		OwnerOnly:           false,
+		Hidden:              false,
+		RequiredPermissions: 0,
+		Invoke:              interleave,
+	})
+	_ = h.AddCommand(&disgoman.Command{
+		Name:                "decode",
+		Aliases:             []string{"d"},
+		Description:         "Decode 1 number into 2",
+		OwnerOnly:           false,
+		Hidden:              false,
+		RequiredPermissions: 0,
+		Invoke:              deinterleave,
+	})
+	_ = h.AddCommand(&disgoman.Command{
+		Name:                "set-puzzle-channel",
+		Aliases:             []string{"spc"},
+		Description:         "Set the channel puzzle messages will be sent to.",
+		OwnerOnly:           false,
+		Hidden:              false,
+		RequiredPermissions: disgoman.PermissionManageServer,
+		Invoke:              puzzleChannel,
+	})
+	_ = h.AddCommand(&disgoman.Command{
+		Name:                "get-puzzle-channel",
+		Aliases:             []string{"gpc"},
+		Description:         "Gets the channel puzzle messages will be sent to.",
+		OwnerOnly:           false,
+		Hidden:              false,
+		RequiredPermissions: disgoman.PermissionManageServer,
+		Invoke:              getPuzzleChannel,
+	})
+	_ = h.AddCommand(&disgoman.Command{
+		Name:                "RPN",
+		Aliases:             []string{"rpn"},
+		Description:         "Convert infix to rpn",
+		OwnerOnly:           false,
+		Hidden:              false,
+		RequiredPermissions: 0,
+		Invoke:              generateRPNCommand,
+	})
+	_ = h.AddCommand(&disgoman.Command{
+		Name:                "ParseRPN",
+		Aliases:             []string{"PRPN", "prpn"},
+		Description:         "Parse RPN string and return the result",
+		OwnerOnly:           false,
+		Hidden:              false,
+		RequiredPermissions: 0,
+		Invoke:              parseRPNCommand,
+	})
+	_ = h.AddCommand(&disgoman.Command{
+		Name:                "solve",
+		Aliases:             []string{"math", "infix"},
+		Description:         "Solve infix equation and return the result",
+		OwnerOnly:           false,
+		Hidden:              false,
+		RequiredPermissions: 0,
+		Invoke:              solveCommand,
+	})
+}

exts/tags.go

@@ -0,0 +1,137 @@
+package exts
+
+import (
+	"errors"
+	"fmt"
+	"log"
+	"strings"
+
+	"github.com/dustinpianalto/disgoman"
+	"github.com/dustinpianalto/goff/utils"
+	"github.com/kballard/go-shellquote"
+)
+
+func addTagCommand(ctx disgoman.Context, input []string) {
+	if len(input) >= 1 {
+		args, err := shellquote.Split(strings.Join(input, " "))
+		if err != nil {
+			if strings.Contains(err.Error(), "Unterminated") {
+				args = strings.SplitN(strings.Join(args, " "), " ", 2)
+			} else {
+				ctx.ErrorChannel <- disgoman.CommandError{
+					Context: ctx,
+					Message: "",
+					Error:   err,
+				}
+				return
+			}
+		}
+		queryString := `SELECT tags.id, tags.tag, tags.content from tags
+		WHERE tags.guild_id = $1
+		AND tags.tag = $2;`
+		row := utils.Database.QueryRow(queryString, ctx.Guild.ID, args[0])
+		var dest string
+		if err := row.Scan(&dest); err != nil {
+			tag := args[0]
+			if tag == "" {
+				ctx.ErrorChannel <- disgoman.CommandError{
+					Context: ctx,
+					Message: "That is not a valid tag name",
+					Error:   err,
+				}
+				return
+			}
+			if len(args) <= 1 {
+				ctx.ErrorChannel <- disgoman.CommandError{
+					Context: ctx,
+					Message: "I got a name but no value",
+					Error:   err,
+				}
+				return
+			}
+			value := args[1]
+			if value == "" {
+				ctx.ErrorChannel <- disgoman.CommandError{
+					Context: ctx,
+					Message: "You have to include a content for the tag",
+					Error:   err,
+				}
+				return
+			}
+			queryString = `INSERT INTO tags (tag, content, creator, guild_id) VALUES ($1, $2, $3, $4);`
+			_, err := utils.Database.Exec(queryString, tag, value, ctx.Message.Author.ID, ctx.Guild.ID)
+			if err != nil {
+				ctx.Send(err.Error())
+				ctx.ErrorChannel <- disgoman.CommandError{
+					Context: ctx,
+					Message: "",
+					Error:   err,
+				}
+				return
+			}
+			ctx.Send(fmt.Sprintf("Tag %v added successfully.", tag))
+			return
+		} else {
+			ctx.ErrorChannel <- disgoman.CommandError{
+				Context: ctx,
+				Message: "That tag already exists",
+				Error:   err,
+			}
+			return
+		}
+	} else {
+		ctx.Send("You need to tell me what tag you want to add...")
+		ctx.ErrorChannel <- disgoman.CommandError{
+			Context: ctx,
+			Message: "You need to tell me what tag you want to add...",
+			Error:   errors.New("nothing to do"),
+		}
+		return
+	}
+}
+
+func tagCommand(ctx disgoman.Context, args []string) {
+	if len(args) >= 1 {
+		tagString := strings.Join(args, " ")
+		queryString := `SELECT tags.id, tags.tag, tags.content from tags
+		WHERE tags.guild_id = $1;`
+		rows, err := utils.Database.Query(queryString, ctx.Guild.ID)
+		if err != nil {
+			ctx.ErrorChannel <- disgoman.CommandError{
+				Context: ctx,
+				Message: "",
+				Error:   err,
+			}
+			return
+		} else {
+			for rows.Next() {
+				var (
+					id      int
+					tag     string
+					content string
+				)
+				if err := rows.Scan(&id, &tag, &content); err != nil {
+					log.Fatal(err)
+				}
+				if tagString == tag {
+					ctx.Send(content)
+					return
+				}
+			}
+			ctx.ErrorChannel <- disgoman.CommandError{
+				Context: ctx,
+				Message: fmt.Sprintf("Tag %v not found", args[0]),
+				Error:   err,
+			}
+			return
+		}
+	} else {
+		ctx.Send("I need a tag to fetch...")
+		ctx.ErrorChannel <- disgoman.CommandError{
+			Context: ctx,
+			Message: "I need a tag to fetch...",
+			Error:   errors.New("nothing to do"),
+		}
+		return
+	}
+}

exts/tasks.go

@@ -0,0 +1,56 @@
+package exts
+
+import (
+	"errors"
+	"fmt"
+	"strings"
+	"time"
+
+	"github.com/dustinpianalto/disgoman"
+	"github.com/dustinpianalto/goff/utils"
+	"github.com/olebedev/when"
+	"github.com/olebedev/when/rules/common"
+	"github.com/olebedev/when/rules/en"
+)
+
+func addReminderCommand(ctx disgoman.Context, args []string) {
+	w := when.New(nil)
+	w.Add(en.All...)
+	w.Add(common.All...)
+
+	text := strings.Join(args, " ")
+	r, err := w.Parse(text, time.Now())
+	if err != nil {
+		ctx.ErrorChannel <- disgoman.CommandError{
+			Context: ctx,
+			Message: "Error parsing time",
+			Error:   err,
+		}
+		return
+	}
+	if r == nil {
+		ctx.ErrorChannel <- disgoman.CommandError{
+			Context: ctx,
+			Message: "You need to include a valid time",
+			Error:   errors.New("no time found"),
+		}
+		return
+	}
+	content := strings.Replace(text, r.Text+" ", "", 1)
+	query := "INSERT INTO tasks (type, content, guild_id, channel_id, user_id, trigger_time) " +
+		"VALUES ('Reminder', $1, $2, $3, $4, $5)"
+	_, err = utils.Database.Exec(query, content, ctx.Guild.ID, ctx.Channel.ID, ctx.User.ID, r.Time)
+	if err != nil {
+		ctx.ErrorChannel <- disgoman.CommandError{
+			Context: ctx,
+			Message: "Error adding task to database",
+			Error:   err,
+		}
+		return
+	}
+	_ = ctx.Session.MessageReactionAdd(ctx.Channel.ID, ctx.Message.ID, "✅")
+	_, _ = ctx.Session.ChannelMessageSend(
+		ctx.Channel.ID,
+		fmt.Sprintf("I will remind you at %v, with `%v`", r.Time.Format(time.RFC1123), content),
+	)
+}

exts/user_management.go

@@ -0,0 +1,256 @@
+package exts
+
+import (
+	"errors"
+	"fmt"
+	"strings"
+	"time"
+
+	"github.com/bwmarrin/discordgo"
+	"github.com/dustinpianalto/disgoman"
+	"github.com/dustinpianalto/goff/utils"
+)
+
+func kickUserCommand(ctx disgoman.Context, args []string) {
+	var member *discordgo.Member
+	var err error
+	if len(ctx.Message.Mentions) > 0 {
+		member, err = ctx.Session.GuildMember(ctx.Guild.ID, ctx.Message.Mentions[0].ID)
+	} else if len(args) >= 1 {
+		idString := args[0]
+		if strings.HasPrefix(idString, "<@!") && strings.HasSuffix(idString, ">") {
+			idString = idString[3 : len(idString)-1]
+		}
+		member, err = ctx.Session.GuildMember(ctx.Guild.ID, idString)
+	} else {
+		err = errors.New("that is not a valid id")
+	}
+	if err != nil {
+		ctx.ErrorChannel <- disgoman.CommandError{
+			Context: ctx,
+			Message: "Couldn't get that member",
+			Error:   err,
+		}
+		return
+	}
+
+	if higher, _ := disgoman.HasHigherRole(ctx.Session, ctx.Guild.ID, ctx.Message.Author.ID, member.User.ID); !higher {
+		ctx.ErrorChannel <- disgoman.CommandError{
+			Context: ctx,
+			Message: "You must have a higher role than the person you are trying to kick",
+			Error:   errors.New("need higher role"),
+		}
+		return
+	}
+
+	if higher, _ := disgoman.HasHigherRole(ctx.Session, ctx.Guild.ID, ctx.Session.State.User.ID, member.User.ID); !higher {
+		ctx.ErrorChannel <- disgoman.CommandError{
+			Context: ctx,
+			Message: "I don't have a high enough role to kick that person",
+			Error:   errors.New("need higher role"),
+		}
+		return
+	}
+
+	var reason string
+	if len(args) > 1 {
+		reason = strings.Join(args[1:], " ")
+	} else {
+		reason = "No Reason Given"
+	}
+	auditReason := fmt.Sprintf("%v#%v: %v", ctx.User.Username, ctx.User.Discriminator, reason)
+	err = ctx.Session.GuildMemberDeleteWithReason(ctx.Guild.ID, member.User.ID, auditReason)
+
+	if err != nil {
+		ctx.ErrorChannel <- disgoman.CommandError{
+			Context: ctx,
+			Message: fmt.Sprintf("Something went wrong kicking %v", member.User.Username),
+			Error:   err,
+		}
+		return
+	}
+
+	event := &utils.LogEvent{
+		Embed: discordgo.MessageEmbed{
+			Title: "User Kicked",
+			Description: fmt.Sprintf(
+				"User %v#%v was kicked by %v.\nReason: %v",
+				member.User.Username,
+				member.User.Discriminator,
+				ctx.Message.Author.Username,
+				reason),
+			Timestamp: time.Now().Format("2006-01-02 15:04:05"),
+			Color:     0xff8c00,
+		},
+		GuildID: ctx.Guild.ID,
+		Session: ctx.Session,
+	}
+	utils.LoggingChannel <- event
+	_, _ = ctx.Send(fmt.Sprintf("User %v#%v has been kicked.", member.User.Username, member.User.Discriminator))
+}
+
+func banUserCommand(ctx disgoman.Context, args []string) {
+	var user *discordgo.User
+	var err error
+	if len(ctx.Message.Mentions) > 0 {
+		user, err = ctx.Session.User(ctx.Message.Mentions[0].ID)
+	} else if len(args) >= 1 {
+		idString := args[0]
+		if strings.HasPrefix(idString, "<@!") && strings.HasSuffix(idString, ">") {
+			idString = idString[3 : len(idString)-1]
+		}
+		user, err = ctx.Session.User(idString)
+	} else {
+		err = errors.New("that is not a valid id")
+	}
+	if err != nil {
+		ctx.ErrorChannel <- disgoman.CommandError{
+			Context: ctx,
+			Message: "Couldn't get that user",
+			Error:   err,
+		}
+		return
+	}
+
+	if higher, err := disgoman.HasHigherRole(ctx.Session, ctx.Guild.ID, ctx.Message.Author.ID, user.ID); err != nil {
+		if err.Error() == "can't find caller member" {
+			ctx.ErrorChannel <- disgoman.CommandError{
+				Context: ctx,
+				Message: "Who are you?",
+				Error:   err,
+			}
+			return
+		}
+	} else if !higher {
+		ctx.ErrorChannel <- disgoman.CommandError{
+			Context: ctx,
+			Message: "You must have a higher role than the person you are trying to ban",
+			Error:   errors.New("need higher role"),
+		}
+		return
+	}
+
+	if higher, err := disgoman.HasHigherRole(ctx.Session, ctx.Guild.ID, ctx.Session.State.User.ID, user.ID); err != nil {
+		if err.Error() == "can't find caller member" {
+			ctx.ErrorChannel <- disgoman.CommandError{
+				Context: ctx,
+				Message: "Who am I?",
+				Error:   err,
+			}
+			return
+		}
+	} else if !higher {
+		ctx.ErrorChannel <- disgoman.CommandError{
+			Context: ctx,
+			Message: "I don't have a high enough role to ban that person",
+			Error:   errors.New("need higher role"),
+		}
+		return
+	}
+
+	var reason string
+	if len(args) > 1 {
+		reason = strings.Join(args[1:], " ")
+	} else {
+		reason = "No Reason Given"
+	}
+	auditReason := fmt.Sprintf("%v#%v: %v", ctx.User.Username, ctx.User.Discriminator, reason)
+	days := 7
+	if ctx.Invoked == "ban-no-delete" {
+		days = 0
+	}
+	err = ctx.Session.GuildBanCreateWithReason(ctx.Guild.ID, user.ID, auditReason, days)
+
+	if err != nil {
+		ctx.ErrorChannel <- disgoman.CommandError{
+			Context: ctx,
+			Message: fmt.Sprintf("Something went wrong banning %v", user.Username),
+			Error:   err,
+		}
+		return
+	}
+
+	event := &utils.LogEvent{
+		Embed: discordgo.MessageEmbed{
+			Title: "User Banned",
+			Description: fmt.Sprintf(
+				"User %v#%v was banned by %v.\nReason: %v",
+				user.Username,
+				user.Discriminator,
+				ctx.Message.Author.Username,
+				reason),
+			Timestamp: time.Now().Format("2006-01-02 15:04:05"),
+			Color:     0xff0000,
+		},
+		GuildID: ctx.Guild.ID,
+		Session: ctx.Session,
+	}
+	utils.LoggingChannel <- event
+	_, _ = ctx.Send(fmt.Sprintf("User %v#%v has been banned.", user.Username, user.Discriminator))
+}
+
+func unbanUserCommand(ctx disgoman.Context, args []string) {
+	var user *discordgo.User
+	var err error
+	if len(ctx.Message.Mentions) > 0 {
+		user, err = ctx.Session.User(ctx.Message.Mentions[0].ID)
+	} else if len(args) >= 1 {
+		idString := args[0]
+		if strings.HasPrefix(idString, "<@!") && strings.HasSuffix(idString, ">") {
+			idString = idString[3 : len(idString)-1]
+		}
+		user, err = ctx.Session.User(idString)
+	} else {
+		err = errors.New("that is not a valid id")
+	}
+	if err != nil {
+		ctx.ErrorChannel <- disgoman.CommandError{
+			Context: ctx,
+			Message: "Couldn't get that user",
+			Error:   err,
+		}
+		return
+	}
+
+	bans, err := ctx.Session.GuildBans(ctx.Guild.ID)
+	if err != nil {
+		ctx.ErrorChannel <- disgoman.CommandError{
+			Context: ctx,
+			Message: "Error processing current bans",
+			Error:   err,
+		}
+		return
+	}
+	for _, ban := range bans {
+		if ban.User.ID == user.ID {
+			err = ctx.Session.GuildBanDelete(ctx.Guild.ID, user.ID)
+			if err != nil {
+				ctx.ErrorChannel <- disgoman.CommandError{
+					Context: ctx,
+					Message: fmt.Sprintf("Something went wrong unbanning %v", user.Username),
+					Error:   err,
+				}
+				return
+			}
+			event := &utils.LogEvent{
+				Embed: discordgo.MessageEmbed{
+					Title: "User Banned",
+					Description: fmt.Sprintf(
+						"User %v#%v was unbanned by %v.\nOrignal Ban Reason: %v",
+						user.Username,
+						user.Discriminator,
+						ctx.Message.Author.Username,
+						ban.Reason),
+					Timestamp: time.Now().Format("2006-01-02 15:04:05"),
+					Color:     0x00ff00,
+				},
+				GuildID: ctx.Guild.ID,
+				Session: ctx.Session,
+			}
+			utils.LoggingChannel <- event
+			_, _ = ctx.Send(fmt.Sprintf("User %v#%v has been unbanned.", user.Username, user.Discriminator))
+			return
+		}
+	}
+	_, _ = ctx.Send(fmt.Sprintf("%v#%v is not banned in this guild.", user.Username, user.Discriminator))
+}

exts/utils.go

@@ -0,0 +1,169 @@
+package exts
+
+import (
+	"fmt"
+	"sort"
+	"strconv"
+	"strings"
+	"time"
+
+	"github.com/bwmarrin/discordgo"
+	"github.com/dustinpianalto/disgoman"
+	"github.com/dustinpianalto/goff/utils"
+)
+
+func pingCommand(ctx disgoman.Context, _ []string) {
+	timeBefore := time.Now()
+	msg, _ := ctx.Send("Pong!")
+	took := time.Now().Sub(timeBefore)
+	_, err := ctx.Session.ChannelMessageEdit(ctx.Message.ChannelID, msg.ID, fmt.Sprintf("Pong!\nPing Took **%s**", took.String()))
+	if err != nil {
+		ctx.ErrorChannel <- disgoman.CommandError{
+			Context: ctx,
+			Message: "Ping Failed",
+			Error:   err,
+		}
+	}
+}
+
+func inviteCommand(ctx disgoman.Context, args []string) {
+	var ids []string
+	if len(args) == 0 {
+		ids = []string{ctx.Session.State.User.ID}
+	} else {
+		for _, id := range args {
+			ids = append(ids, id)
+		}
+	}
+	for _, id := range ids {
+		url := fmt.Sprintf("<https://discordapp.com/oauth2/authorize?client_id=%v&scope=bot>", id)
+		_, err := ctx.Send(url)
+		if err != nil {
+			ctx.ErrorChannel <- disgoman.CommandError{
+				Context: ctx,
+				Message: "Couldn't send the invite link.",
+				Error:   err,
+			}
+		}
+	}
+}
+
+func gitCommand(ctx disgoman.Context, _ []string) {
+	embed := &discordgo.MessageEmbed{
+		Title: "Hi there, My code is on Github",
+		Color: 0,
+		URL:   "https://github.com/dustinpianalto/Goff",
+	}
+	_, err := ctx.Session.ChannelMessageSendEmbed(ctx.Channel.ID, embed)
+	if err != nil {
+		ctx.ErrorChannel <- disgoman.CommandError{
+			Context: ctx,
+			Message: "Git failed",
+			Error:   err,
+		}
+	}
+}
+
+func sayCommand(ctx disgoman.Context, args []string) {
+	resp := strings.Join(args, " ")
+	resp = strings.ReplaceAll(resp, "@everyone", "@\ufff0everyone")
+	resp = strings.ReplaceAll(resp, "@here", "@\ufff0here")
+	_, err := ctx.Session.ChannelMessageSend(ctx.Message.ChannelID, resp)
+	if err != nil {
+		ctx.ErrorChannel <- disgoman.CommandError{
+			Context: ctx,
+			Message: "Say Failed",
+			Error:   err,
+		}
+	}
+}
+
+func userCommand(ctx disgoman.Context, args []string) {
+	var member *discordgo.Member
+	if len(args) == 0 {
+		member, _ = ctx.Session.GuildMember(ctx.Guild.ID, ctx.Message.Author.ID)
+	} else {
+		var err error
+		if len(ctx.Message.Mentions) > 0 {
+			member, err = ctx.Session.GuildMember(ctx.Guild.ID, ctx.Message.Mentions[0].ID)
+		} else {
+			member, err = ctx.Session.GuildMember(ctx.Guild.ID, args[0])
+		}
+		if err != nil {
+			ctx.ErrorChannel <- disgoman.CommandError{
+				Context: ctx,
+				Message: "Couldn't get that member",
+				Error:   err,
+			}
+			return
+		}
+	}
+	thumb := &discordgo.MessageEmbedThumbnail{
+		URL: member.User.AvatarURL(""),
+	}
+
+	var botString string
+	if member.User.Bot {
+		botString = "BOT"
+	} else {
+		botString = ""
+	}
+
+	var roles []*discordgo.Role
+	for _, roleID := range member.Roles {
+		role, _ := ctx.Session.State.Role(ctx.Guild.ID, roleID)
+		roles = append(roles, role)
+	}
+	sort.Slice(roles, func(i, j int) bool { return roles[i].Position > roles[j].Position })
+	var roleMentions []string
+	for _, role := range roles {
+		roleMentions = append(roleMentions, role.Mention())
+	}
+	var rolesString string
+	if len(roleMentions) > 0 {
+		rolesString = strings.Join(roleMentions, " ")
+	} else {
+		rolesString = "None"
+	}
+
+	rolesField := &discordgo.MessageEmbedField{
+		Name:   "Roles:",
+		Value:  rolesString,
+		Inline: false,
+	}
+
+	guildJoinTime, _ := member.JoinedAt.Parse()
+	guildJoinedField := &discordgo.MessageEmbedField{
+		Name:   "Joined Guild:",
+		Value:  utils.ParseDateString(guildJoinTime),
+		Inline: false,
+	}
+
+	int64ID, _ := strconv.ParseInt(member.User.ID, 10, 64)
+	s := utils.ParseSnowflake(int64ID)
+	discordJoinedField := &discordgo.MessageEmbedField{
+		Name:   "Joined Discord:",
+		Value:  utils.ParseDateString(s.CreationTime),
+		Inline: false,
+	}
+
+	embed := &discordgo.MessageEmbed{
+		Title:       fmt.Sprintf("%v#%v  %v", member.User.Username, member.User.Discriminator, botString),
+		Description: fmt.Sprintf("**%v** (%v)", member.Nick, member.User.ID),
+		Color:       ctx.Session.State.UserColor(member.User.ID, ctx.Channel.ID),
+		Thumbnail:   thumb,
+		Fields: []*discordgo.MessageEmbedField{
+			guildJoinedField,
+			discordJoinedField,
+			rolesField,
+		},
+	}
+	_, err := ctx.Session.ChannelMessageSendEmbed(ctx.Channel.ID, embed)
+	if err != nil {
+		ctx.ErrorChannel <- disgoman.CommandError{
+			Context: ctx,
+			Message: "Couldn't send the user embed",
+			Error:   err,
+		}
+	}
+}

go.mod

@@ -1,13 +1,13 @@
-module djpianalto.com/goff
+module github.com/dustinpianalto/goff
 
 go 1.14
 
 require (
 	github.com/bwmarrin/discordgo v0.20.3-0.20200525154655-ca64123b05de
 	github.com/dustinpianalto/disgoman v0.0.10
+	github.com/dustinpianalto/rpnparse v1.0.1
 	github.com/emersion/go-imap v1.0.5
 	github.com/emersion/go-message v0.12.0
-	github.com/dustinpianalto/rpnparse v1.0.1
 	github.com/kballard/go-shellquote v0.0.0-20180428030007-95032a82bc51
 	github.com/lib/pq v1.3.0
 	github.com/olebedev/when v0.0.0-20190311101825-c3b538a97254

goff.go

@@ -0,0 +1,136 @@
+package main
+
+import (
+	"fmt"
+	"log"
+
+	"github.com/dustinpianalto/disgoman"
+	"github.com/dustinpianalto/goff/events"
+	"github.com/dustinpianalto/goff/exts"
+	"github.com/dustinpianalto/goff/utils"
+
+	//"github.com/MikeModder/anpan"
+	"os"
+	"os/signal"
+	"syscall"
+
+	"github.com/bwmarrin/discordgo"
+)
+
+var (
+	Token string
+)
+
+//func init() {
+//	flag.StringVar(&Token, "t", "", "Bot Token")
+//	flag.Parse()
+//}
+
+func main() {
+	Token = os.Getenv("DISCORDGO_TOKEN")
+	dg, err := discordgo.New("Bot " + Token)
+	if err != nil {
+		fmt.Println("There was an error when creating the Discord Session, ", err)
+		return
+	}
+	dg.State.MaxMessageCount = 100
+
+	utils.ConnectDatabase(os.Getenv("DATABASE_URL"))
+	utils.InitializeDatabase()
+	//utils.LoadTestData()
+
+	//prefixes := []string{
+	//	"Go.",
+	//}
+	owners := []string{
+		"351794468870946827",
+	}
+
+	// Arguments are:
+	// prefixes    - []string
+	// owner ids   - []string
+	// ignore bots - bool
+	// check perms - bool
+	handler := disgoman.CommandManager{
+		Prefixes:         getPrefixes,
+		Owners:           owners,
+		StatusManager:    disgoman.GetDefaultStatusManager(),
+		ErrorChannel:     make(chan disgoman.CommandError, 10),
+		Commands:         make(map[string]*disgoman.Command),
+		IgnoreBots:       true,
+		CheckPermissions: false,
+	}
+
+	// Add Command Handlers
+	exts.AddCommandHandlers(&handler)
+
+	//if _, ok := handler.Commands["help"]; !ok {
+	//	handler.AddDefaultHelpCommand()
+	//}
+
+	dg.AddHandler(handler.OnMessage)
+	dg.AddHandler(handler.StatusManager.OnReady)
+	dg.AddHandler(events.OnMessageUpdate)
+	dg.AddHandler(events.OnMessageDelete)
+	dg.AddHandler(events.OnGuildMemberAddLogging)
+	dg.AddHandler(events.OnGuildMemberRemoveLogging)
+
+	err = dg.Open()
+	if err != nil {
+		fmt.Println("There was an error opening the connection, ", err)
+		return
+	}
+
+	// Start the Error handler in a goroutine
+	go ErrorHandler(handler.ErrorChannel)
+
+	// Start the Logging handler in a goroutine
+	go utils.LoggingHandler(utils.LoggingChannel)
+
+	// Start the task handler in a goroutine
+	go utils.ProcessTasks(dg, 1)
+
+	go utils.RecieveEmail(dg)
+
+	fmt.Println("The Bot is now running.")
+	sc := make(chan os.Signal, 1)
+	signal.Notify(sc, syscall.SIGINT, syscall.SIGTERM, os.Interrupt, os.Kill)
+	<-sc
+
+	fmt.Println("Shutting Down...")
+	err = dg.Close()
+	if err != nil {
+		fmt.Println(err)
+	}
+}
+
+func getPrefixes(guildID string) []string {
+	queryString := "Select prefix from prefixes p, x_guilds_prefixes xgp where xgp.guild_id = $1 and xgp.prefix_id = p.id"
+	rows, err := utils.Database.Query(queryString, guildID)
+	if err != nil {
+		log.Println(err)
+		return []string{"Go.", "go."}
+	}
+	var prefixes []string
+	for rows.Next() {
+		var prefix string
+		err = rows.Scan(&prefix)
+		if err != nil {
+			log.Println(err)
+			return []string{"Go.", "go."}
+		}
+		prefixes = append(prefixes, prefix)
+	}
+	return prefixes
+}
+
+func ErrorHandler(ErrorChan chan disgoman.CommandError) {
+	for ce := range ErrorChan {
+		msg := ce.Message
+		if msg == "" {
+			msg = ce.Error.Error()
+		}
+		_, _ = ce.Context.Send(msg)
+		fmt.Println(ce.Error)
+	}
+}

utils/database.go

@@ -0,0 +1,154 @@
+package utils
+
+import (
+	"database/sql"
+	"fmt"
+	"log"
+
+	_ "github.com/lib/pq"
+)
+
+var (
+	Database *sql.DB
+)
+
+func ConnectDatabase(dbConnString string) {
+	db, err := sql.Open("postgres", dbConnString)
+	if err != nil {
+		panic(fmt.Sprintf("Can't connect to the database. %v", err))
+	} else {
+		fmt.Println("Database Connected.")
+	}
+	Database = db
+}
+
+func InitializeDatabase() {
+	_, err := Database.Query("CREATE TABLE IF NOT EXISTS users(" +
+		"id varchar(30) primary key," +
+		"banned bool not null default false," +
+		"logging bool not null default true," +
+		"steam_id varchar(30) NOT NULL DEFAULT ''," +
+		"is_active bool not null default true," +
+		"is_staff bool not null default false," +
+		"is_admin bool not null default false" +
+		")")
+	if err != nil {
+		fmt.Println(err)
+	}
+	_, err = Database.Query("CREATE TABLE IF NOT EXISTS guilds(" +
+		"id varchar(30) primary key," +
+		"welcome_message varchar(1000) NOT NULL DEFAULT ''," +
+		"goodbye_message varchar(1000) NOT NULL DEFAULT ''," +
+		"logging_channel varchar(30) NOT NULL DEFAULT ''," +
+		"welcome_channel varchar(30) NOT NULL DEFAULT ''" +
+		")")
+	if err != nil {
+		fmt.Println(err)
+	}
+	_, err = Database.Query("CREATE TABLE IF NOT EXISTS prefixes(" +
+		"id serial primary key," +
+		"prefix varchar(10) not null unique default 'Go.'" +
+		")")
+	if err != nil {
+		fmt.Println(err)
+	}
+	_, err = Database.Query("CREATE TABLE IF NOT EXISTS tags(" +
+		"id serial primary key," +
+		"tag varchar(100) not null unique," +
+		"content varchar(1000) not null," +
+		"creator varchar(30) not null references users(id)," +
+		"creation_time timestamp not null default NOW()," +
+		"guild_id varchar(30) not null references guilds(id)" +
+		")")
+	if err != nil {
+		fmt.Println(err)
+	}
+	_, err = Database.Query("CREATE TABLE IF NOT EXISTS x_users_guilds(" +
+		"guild_id varchar(30) not null references guilds(id)," +
+		"user_id varchar(30) not null references users(id)" +
+		")")
+	if err != nil {
+		fmt.Println(err)
+	}
+	_, err = Database.Query("CREATE TABLE IF NOT EXISTS x_guilds_prefixes(" +
+		"guild_id varchar(30) not null references guilds(id)," +
+		"prefix_id int not null references prefixes(id)" +
+		")")
+	if err != nil {
+		fmt.Println(err)
+	}
+	_, err = Database.Query("CREATE TABLE IF NOT EXISTS tasks(" +
+		"id serial primary key," +
+		"type varchar(10) not null," +
+		"content text not null," +
+		"guild_id varchar(30) not null references guilds(id)," +
+		"channel_id varchar(30) not null," +
+		"user_id varchar(30) not null," +
+		"creation_time timestamp not null default NOW()," +
+		"trigger_time timestamp not null," +
+		"completed bool not null default false," +
+		"processing bool default false)")
+	if err != nil {
+		fmt.Println(err)
+	}
+	_, err = Database.Query(`CREATE TABLE IF NOT EXISTS postfixes(
+		id serial primary key,
+		name varchar(100) not null,
+		time timestamp not null default NOW())`)
+	if err != nil {
+		log.Println(err)
+	}
+	_, err = Database.Exec(`CREATE TABLE IF NOT EXISTS puzzles(
+		id serial primary key,
+		text text not null,
+		time timestamp not null
+		)`)
+	if err != nil {
+		log.Println(err)
+	}
+	_, err = Database.Exec(`CREATE TABLE IF NOT EXISTS x_guilds_puzzles(
+		id serial primary key,
+		guild_id varchar(30) not null references guilds(id),
+		puzzle_id int not null references puzzles(id),
+		message_id varchar(30) not null
+		)`)
+	RunPostfixes()
+}
+
+func LoadTestData() {
+	_, err := Database.Query("INSERT INTO users (id, banned, logging, steam_id, is_active, is_staff, is_admin) values " +
+		"('351794468870946827', false, true, '76561198024193239', true, true, true)," +
+		"('692908139506434065', false, true, '', true, false, false)," +
+		"('396588996706304010', false, true, '', true, true, false)")
+	if err != nil {
+		fmt.Println(err)
+	}
+	_, err = Database.Query("INSERT INTO guilds (id, welcome_message, goodbye_message) VALUES " +
+		"('265828729970753537', 'Hey there is someone new here.', 'Well fine then... Just leave without saying goodbye')")
+	if err != nil {
+		fmt.Println(err)
+	}
+	_, err = Database.Query("INSERT INTO prefixes (prefix) VALUES ('Godev.'), ('godev.'), ('godev,')")
+	if err != nil {
+		fmt.Println(err)
+	}
+	_, err = Database.Query("INSERT INTO x_users_guilds (guild_id, user_id) VALUES " +
+		"('265828729970753537', '351794468870946827')," +
+		"('265828729970753537', '692908139506434065')," +
+		"('265828729970753537', '396588996706304010')")
+	if err != nil {
+		fmt.Println(err)
+	}
+	_, err = Database.Query("INSERT INTO x_guilds_prefixes (guild_id, prefix_id) VALUES " +
+		"('265828729970753537', 1)," +
+		"('265828729970753537', 2)," +
+		"('265828729970753537', 3)")
+	if err != nil {
+		fmt.Println(err)
+	}
+	_, err = Database.Query("INSERT INTO tags (tag, content, creator, guild_id) VALUES " +
+		"('test', 'This is a test of the tag system', '351794468870946827', '265828729970753537')")
+	if err != nil {
+		fmt.Println(err)
+	}
+}

utils/date_strings.go

@@ -0,0 +1,64 @@
+package utils
+
+import (
+	"fmt"
+	"time"
+)
+
+func ParseDateString(inTime time.Time) string {
+	d := time.Now().Sub(inTime)
+	s := int64(d.Seconds())
+	days := s / 86400
+	s = s - (days * 86400)
+	hours := s / 3600
+	s = s - (hours * 3600)
+	minutes := s / 60
+	seconds := s - (minutes * 60)
+	dateString := ""
+	if days != 0 {
+		dateString += fmt.Sprintf("%v days ", days)
+	}
+	if hours != 0 {
+		dateString += fmt.Sprintf("%v hours ", hours)
+	}
+	if minutes != 0 {
+		dateString += fmt.Sprintf("%v minutes ", minutes)
+	}
+	if seconds != 0 {
+		dateString += fmt.Sprintf("%v seconds ", seconds)
+	}
+	if dateString != "" {
+		dateString += " ago."
+	} else {
+		dateString = "Now"
+	}
+	stamp := inTime.Format("2006-01-02 15:04:05")
+	return fmt.Sprintf("%v\n%v", dateString, stamp)
+}
+
+func ParseDurationString(inDur time.Duration) string {
+	s := int64(inDur.Seconds())
+	days := s / 86400
+	s = s - (days * 86400)
+	hours := s / 3600
+	s = s - (hours * 3600)
+	minutes := s / 60
+	seconds := s - (minutes * 60)
+	durString := ""
+	if days != 0 {
+		durString += fmt.Sprintf("%v days ", days)
+	}
+	if hours != 0 {
+		durString += fmt.Sprintf("%v hours ", hours)
+	}
+	if minutes != 0 {
+		durString += fmt.Sprintf("%v minutes ", minutes)
+	}
+	if seconds != 0 {
+		durString += fmt.Sprintf("%v seconds ", seconds)
+	}
+	if durString == "" {
+		durString = "0 seconds"
+	}
+	return fmt.Sprintf("%v", durString)
+}

utils/email.go

@@ -0,0 +1,132 @@
+package utils
+
+import (
+	"io"
+	"log"
+	"os"
+	"strings"
+	"sync"
+	"time"
+
+	"github.com/bwmarrin/discordgo"
+	imap "github.com/emersion/go-imap"
+	"github.com/emersion/go-imap/client"
+	"github.com/emersion/go-message/mail"
+)
+
+const ()
+
+var (
+	emailUsername = os.Getenv("GOFF_EMAIL_USERNAME")
+	emailPassword = os.Getenv("GOFF_EMAIL_PASSWORD")
+	puzzleAddress = mail.Address{
+		Name:    "Daily Coding Problem",
+		Address: "founders@dailycodingproblem.com",
+	}
+)
+
+var EmailClient client.Client
+
+func RecieveEmail(dg *discordgo.Session) {
+	for {
+		log.Println("Connecting to Email server.")
+
+		EmailClient, err := client.DialTLS("mail.djpianalto.com:993", nil)
+		if err != nil {
+			log.Println(err)
+			return
+		}
+		if err = EmailClient.Login(emailUsername, emailPassword); err != nil {
+			log.Println(err)
+			return
+		}
+		log.Println("Connected to Email server.")
+
+		mbox, err := EmailClient.Select("INBOX", false)
+		if err != nil {
+			log.Println(err)
+			return
+		}
+
+		if mbox.Messages == 0 {
+			log.Println("No Messages in Mailbox")
+		}
+
+		criteria := imap.NewSearchCriteria()
+		criteria.WithoutFlags = []string{"\\Seen"}
+		uids, err := EmailClient.Search(criteria)
+		if err != nil {
+			log.Println(err)
+		}
+		if len(uids) > 0 {
+			seqset := new(imap.SeqSet)
+			seqset.AddNum(uids...)
+			section := &imap.BodySectionName{}
+			items := []imap.FetchItem{section.FetchItem()}
+			messages := make(chan *imap.Message, 10)
+			go func() {
+				if err = EmailClient.Fetch(seqset, items, messages); err != nil {
+					log.Println(err)
+					return
+				}
+			}()
+
+			var wg sync.WaitGroup
+
+			for msg := range messages {
+				if msg == nil {
+					log.Println("No New Messages")
+					continue
+				}
+				r := msg.GetBody(section)
+				if r == nil {
+					log.Println("Server didn't send a message body")
+					continue
+				}
+				wg.Add(1)
+				go processEmail(r, dg, &wg)
+			}
+			wg.Wait()
+		}
+
+		EmailClient.Logout()
+		time.Sleep(300 * time.Second)
+	}
+}
+
+func processEmail(r io.Reader, dg *discordgo.Session, wg *sync.WaitGroup) {
+	defer wg.Done()
+	mr, err := mail.CreateReader(r)
+	if err != nil {
+		log.Println(err)
+		return
+	}
+	header := mr.Header
+	from, err := header.AddressList("From")
+	if err != nil {
+		log.Println(err)
+		return
+	}
+	subject, err := header.Subject()
+	if err != nil {
+		log.Println(err)
+		return
+	}
+	log.Println(from)
+	log.Println(subject)
+	if addressIn(from, puzzleAddress) &&
+		strings.Contains(subject, "Daily Coding Problem:") {
+		log.Println("Processing Puzzle")
+		ProcessPuzzleEmail(mr, dg)
+	}
+
+}
+
+func addressIn(s []*mail.Address, a mail.Address) bool {
+	for _, item := range s {
+		if item.String() == a.String() {
+			return true
+		}
+	}
+	return false
+}

utils/logging.go

@@ -0,0 +1,34 @@
+package utils
+
+import (
+	"fmt"
+	"github.com/bwmarrin/discordgo"
+)
+
+var LoggingChannel = make(chan *LogEvent, 10)
+
+type LogEvent struct {
+	// Embed with log message
+	Embed discordgo.MessageEmbed
+	// Guild to log event in
+	GuildID string
+	// Discordgo Session. Needed for sending messages
+	Session *discordgo.Session
+}
+
+func LoggingHandler(lc chan *LogEvent) {
+	for event := range lc {
+		var channelID string
+		row := Database.QueryRow("SELECT logging_channel FROM guilds where id=$1", event.GuildID)
+		err := row.Scan(&channelID)
+		if err != nil {
+			fmt.Println(err)
+			return
+		}
+		if channelID == "" {
+			return
+		}
+
+		_, _ = event.Session.ChannelMessageSendEmbed(channelID, &event.Embed)
+	}
+}

utils/postfixes.go

@@ -0,0 +1,77 @@
+package utils
+
+import "log"
+
+type postfix struct {
+	Name   string
+	Invoke func(bool) error
+}
+
+var postfixes = []postfix{
+	postfix{
+		Name:   "1_Update_Guild_for_Puzzle",
+		Invoke: updateGuildForPuzzle,
+	},
+	postfix{
+		Name:   "1_Update_X_Guild_Prefixes_to_add_ID",
+		Invoke: updateXGuildPrefixesToAddID,
+	},
+}
+
+func RunPostfixes() {
+	for _, postfix := range postfixes {
+		queryString := "SELECT * from postfixes where name = $1"
+		rows, err := Database.Query(queryString, postfix.Name)
+		if err != nil {
+			log.Println(err)
+			continue
+		}
+		if rows.Next() {
+			continue
+		} else {
+			err := postfix.Invoke(false)
+			if err != nil {
+				continue
+			}
+			_, err = Database.Exec("INSERT INTO postfixes (name) VALUES ($1)", postfix.Name)
+			if err != nil {
+				log.Println(err)
+				continue
+			}
+		}
+	}
+}
+
+func updateGuildForPuzzle(revert bool) error {
+	var queryString string
+	if !revert {
+		queryString = `ALTER TABLE guilds
+		ADD COLUMN puzzle_channel varchar(30) not null default ''`
+	} else {
+		queryString = `ALTER TABLE guilds
+		DROP COLUMN puzzleChat`
+	}
+	_, err := Database.Exec(queryString)
+	if err != nil {
+		log.Println(err)
+		return err
+	}
+	return nil
+}
+
+func updateXGuildPrefixesToAddID(revert bool) error {
+	var queryString string
+	if !revert {
+		queryString = `ALTER TABLE x_guilds_prefixes
+		ADD COLUMN id serial primary key`
+	} else {
+		queryString = `ALTER TABLE x_guilds_prefixes
+		DROP COLUMN id`
+	}
+	_, err := Database.Exec(queryString)
+	if err != nil {
+		log.Println(err)
+		return err
+	}
+	return nil
+}

utils/puzzles.go

@@ -0,0 +1,93 @@
+package utils
+
+import (
+	"io"
+	"io/ioutil"
+	"log"
+	"strings"
+	"time"
+
+	"github.com/bwmarrin/discordgo"
+	"github.com/emersion/go-message/mail"
+)
+
+func ProcessPuzzleEmail(mr *mail.Reader, dg *discordgo.Session) {
+	var body []byte
+	for {
+		p, err := mr.NextPart()
+		if err == io.EOF {
+			break
+		} else if err != nil {
+			log.Println(err)
+			break
+		}
+
+		switch h := p.Header.(type) {
+		case *mail.InlineHeader:
+			// This is the message's text (can be plain-text or HTML)
+			if t, _, _ := h.ContentType(); t == "text/plain" {
+				body, _ = ioutil.ReadAll(p.Body)
+				break
+			}
+		}
+	}
+	if len(body) > 0 {
+		s := string(body)
+		puzzle := strings.Split(s, "----------")[0]
+		date, err := mr.Header.Date()
+		if err != nil {
+			log.Println(err)
+			return
+		}
+		e := discordgo.MessageEmbed{
+			Title:       "Daily Coding Problem",
+			URL:         "https://dailycodingproblem.com/",
+			Description: "```" + puzzle + "```",
+			Timestamp:   date.Format(time.RFC3339),
+			Footer: &discordgo.MessageEmbedFooter{
+				Text: "Daily Coding Problem",
+			},
+		}
+		var guilds []Guild
+		queryString := `SELECT id, puzzle_channel from guilds`
+		rows, err := Database.Query(queryString)
+		if err != nil {
+			log.Println(err)
+		}
+		for rows.Next() {
+			var guild Guild
+			err := rows.Scan(&guild.ID, &guild.PuzzleChannel)
+			if err != nil {
+				log.Println(err)
+				continue
+			}
+			guilds = append(guilds, guild)
+		}
+		var puzzleID int64
+		queryString = "INSERT INTO puzzles (text, time) VALUES ($1, $2) RETURNING id"
+		err = Database.QueryRow(queryString, puzzle, date).Scan(&puzzleID)
+		if err != nil {
+			log.Println(err)
+			return
+		}
+		for _, g := range guilds {
+			if g.PuzzleChannel == "" {
+				continue
+			}
+			msg := discordgo.MessageSend{
+				Embed: &e,
+			}
+			m, err := dg.ChannelMessageSendComplex(g.PuzzleChannel, &msg)
+			if err != nil {
+				log.Println(err)
+			}
+			queryString = "INSERT INTO x_guilds_puzzles (guild_id, puzzle_id, message_id) VALUES ($1, $2, $3)"
+			_, err = Database.Exec(queryString, g.ID, puzzleID, m.ID)
+			if err != nil {
+				log.Println(err)
+				continue
+			}
+		}
+	}
+
+}

utils/rpn.go

@@ -0,0 +1,156 @@
+package utils
+
+import (
+	"fmt"
+	"strconv"
+	"strings"
+)
+
+type Operator struct {
+	Token       string
+	Precedence  int
+	Association string
+}
+
+func (o Operator) HasHigherPrecedence(t Operator) bool {
+	return o.Precedence < t.Precedence // lower number is higher precedence
+}
+
+func (o Operator) HasEqualPrecedence(t Operator) bool {
+	return o.Precedence == t.Precedence
+}
+
+func (o Operator) IsLeftAssociative() bool {
+	return o.Association == "left"
+}
+
+var operators = map[string]Operator{
+	"+": Operator{
+		Token:       "+",
+		Precedence:  4,
+		Association: "left",
+	},
+	"-": Operator{
+		Token:       "-",
+		Precedence:  4,
+		Association: "left",
+	},
+	"*": Operator{
+		Token:       "*",
+		Precedence:  3,
+		Association: "left",
+	},
+	"/": Operator{
+		Token:       "/",
+		Precedence:  3,
+		Association: "left",
+	},
+	"%": Operator{
+		Token:       "%",
+		Precedence:  3,
+		Association: "left",
+	},
+	"(": Operator{
+		Token:       "(",
+		Precedence:  1,
+		Association: "left",
+	},
+	")": Operator{
+		Token:       ")",
+		Precedence:  1,
+		Association: "left",
+	},
+}
+
+type Stack []Operator
+
+func (s *Stack) IsEmpty() bool {
+	return len(*s) == 0
+}
+
+func (s *Stack) Push(op Operator) {
+	*s = append(*s, op)
+}
+
+func (s *Stack) Pop() (Operator, bool) {
+	if s.IsEmpty() {
+		return Operator{}, false
+	}
+	index := len(*s) - 1
+	element := (*s)[index]
+	*s = (*s)[:index]
+	return element, true
+}
+
+func (s *Stack) Top() Operator {
+	if s.IsEmpty() {
+		return Operator{}
+	}
+	return (*s)[len(*s)-1]
+}
+
+func GenerateRPN(tokens []string) (string, error) {
+	output := ""
+	s := Stack{}
+	for _, token := range tokens {
+		err := processToken(token, &s, &output)
+		if err != nil {
+			return "", err
+		}
+	}
+	for !s.IsEmpty() {
+		ele, _ := s.Pop()
+		output += " " + ele.Token
+	}
+
+	return strings.TrimSpace(output), nil
+}
+
+func processToken(t string, s *Stack, o *string) error {
+	if _, err := strconv.Atoi(t); err == nil {
+		*o += " " + t
+		return nil
+	} else if op, ok := operators[t]; ok {
+		if op.Token == "(" {
+			s.Push(op)
+		} else if op.Token == ")" {
+			if s.IsEmpty() {
+				return fmt.Errorf("mismatched parentheses")
+			}
+			for s.Top().Token != "(" {
+				if ele, ok := s.Pop(); ok {
+					*o += " " + ele.Token
+				} else {
+					return fmt.Errorf("mismatched parentheses")
+				}
+				if s.IsEmpty() {
+					break
+				}
+			}
+			s.Pop() // Pop and discard the (
+		} else if !s.IsEmpty() {
+			for {
+				if (s.Top().HasHigherPrecedence(op) ||
+					(s.Top().HasEqualPrecedence(op) &&
+						op.IsLeftAssociative())) &&
+					s.Top().Token != "(" {
+					if ele, ok := s.Pop(); ok {
+						*o += " " + ele.Token
+						if s.IsEmpty() {
+							break
+						}
+						continue
+					} else {
+						break
+					}
+				}
+				break
+			}
+			s.Push(op)
+		} else {
+			s.Push(op)
+		}
+		return nil
+	}
+	return fmt.Errorf("invalid character %s", t)
+}

utils/rpnParser.go

@@ -0,0 +1,95 @@
+package utils
+
+import (
+	"errors"
+	"fmt"
+	"math"
+	"strconv"
+)
+
+type FStack []float64
+
+func (s *FStack) IsEmpty() bool {
+	return len(*s) == 0
+}
+
+func (s *FStack) Push(op float64) {
+	*s = append(*s, op)
+}
+
+func (s *FStack) Pop() (float64, bool) {
+	if s.IsEmpty() {
+		return 0, false
+	}
+	index := len(*s) - 1
+	element := (*s)[index]
+	*s = (*s)[:index]
+	return element, true
+}
+
+func (s *FStack) PopTwo() (float64, float64, bool) {
+	if s.IsEmpty() || len(*s) < 2 {
+		return 0, 0, false
+	}
+	index := len(*s) - 1
+	b := (*s)[index]
+	a := (*s)[index-1]
+	*s = (*s)[:index-1]
+	return a, b, true
+
+}
+
+func (s *FStack) Top() float64 {
+	if s.IsEmpty() {
+		return 0
+	}
+	return (*s)[len(*s)-1]
+}
+
+func ParseRPN(args []string) (float64, error) {
+	s := FStack{}
+	for _, token := range args {
+		switch token {
+		case "+":
+			if a, b, ok := s.PopTwo(); ok {
+				s.Push(a + b)
+			} else {
+				return 0, fmt.Errorf("not enough operands on stack for +: %v", s)
+			}
+		case "-":
+			if a, b, ok := s.PopTwo(); ok {
+				s.Push(a - b)
+			} else {
+				return 0, fmt.Errorf("not enough operands on stack for -: %v", s)
+			}
+		case "*":
+			if a, b, ok := s.PopTwo(); ok {
+				s.Push(a * b)
+			} else {
+				return 0, fmt.Errorf("not enough operands on stack for *: %v", s)
+			}
+		case "/":
+			if a, b, ok := s.PopTwo(); ok {
+				s.Push(a / b)
+			} else {
+				return 0, fmt.Errorf("not enough operands on stack for /: %v", s)
+			}
+		case "%":
+			if a, b, ok := s.PopTwo(); ok {
+				s.Push(math.Mod(a, b))
+			} else {
+				return 0, fmt.Errorf("not enough operands on stack for %: %v", s)
+			}
+		default:
+			f, err := strconv.ParseFloat(token, 64)
+			if err != nil {
+				return 0, err
+			}
+			s.Push(f)
+		}
+	}
+	if res, ok := s.Pop(); ok {
+		return res, nil
+	}
+	return 0, errors.New("no result")
+}

utils/snowflake.go

@@ -0,0 +1,32 @@
+package utils
+
+import "time"
+
+type Snowflake struct {
+	CreationTime time.Time
+	WorkerID     int8
+	ProcessID    int8
+	Increment    int16
+}
+
+func ParseSnowflake(s int64) Snowflake {
+	const (
+		DISCORD_EPOCH   = 1420070400000
+		TIME_BITS_LOC   = 22
+		WORKER_ID_LOC   = 17
+		WORKER_ID_MASK  = 0x3E0000
+		PROCESS_ID_LOC  = 12
+		PROCESS_ID_MASK = 0x1F000
+		INCREMENT_MASK  = 0xFFF
+	)
+	creationTime := time.Unix(((s>>TIME_BITS_LOC)+DISCORD_EPOCH)/1000.0, 0)
+	workerID := (s & WORKER_ID_MASK) >> WORKER_ID_LOC
+	processID := (s & PROCESS_ID_MASK) >> PROCESS_ID_LOC
+	increment := s & INCREMENT_MASK
+	return Snowflake{
+		CreationTime: creationTime,
+		WorkerID:     int8(workerID),
+		ProcessID:    int8(processID),
+		Increment:    int16(increment),
+	}
+}

utils/tasks.go

@@ -0,0 +1,132 @@
+package utils
+
+import (
+	"fmt"
+	"github.com/bwmarrin/discordgo"
+	"log"
+	"time"
+)
+
+type Task struct {
+	ID           int64
+	Type         string
+	Content      string
+	GuildID      string
+	ChannelID    string
+	UserID       string
+	CreationTime time.Time
+	TriggerTime  time.Time
+}
+
+func processTask(task *Task, s *discordgo.Session) {
+	query := "SELECT completed, processing from tasks where id = $1"
+	res, err := Database.Query(query, task.ID)
+	if err != nil {
+		log.Println(err)
+		return
+	}
+	var completed bool
+	var processing bool
+	res.Next()
+	err = res.Scan(&completed, &processing)
+	if err != nil {
+		log.Println(err)
+		return
+	}
+	if completed || processing {
+		return
+	}
+	closeQuery := "Update tasks set completed = true where id = $1"
+	processQuery := "UPDATE tasks SET processing = true WHERE id = $1"
+	defer Database.Exec(closeQuery, task.ID)
+	_, err = Database.Exec(processQuery, task.ID)
+	if err != nil {
+		log.Println(err)
+		return
+	}
+	log.Println(fmt.Sprintf("Processing task %v", task.ID))
+	guild, err := s.Guild(task.GuildID)
+	if err != nil {
+		log.Print(fmt.Sprintf("Can't find guild with ID %v. Canceling task %v.", task.GuildID, task.ID))
+		return
+	}
+	channel, err := s.Channel(task.ChannelID)
+	if err != nil {
+		log.Print(fmt.Sprintf("Can't find channel with ID %v. Canceling task %v.", task.ChannelID, task.ID))
+		return
+	}
+	if channel.GuildID != guild.ID {
+		log.Print(fmt.Sprintf("The channel %v is not in guild %v. Canceling task %v.", channel.Name, guild.Name, task.ID))
+		return
+	}
+	member, err := s.GuildMember(guild.ID, task.UserID)
+	if err != nil {
+		log.Print(fmt.Sprintf("Can't find user with ID %v in guild %v. Canceling task %v.", task.UserID, guild.Name, task.ID))
+		return
+	}
+	if task.Type == "Reminder" {
+		color := s.State.UserColor(member.User.ID, channel.ID)
+		e := discordgo.MessageEmbed{
+			Title:       "REMINDER",
+			Description: task.Content,
+			Timestamp:   task.CreationTime.Format(time.RFC3339),
+			Color:       color,
+			Footer: &discordgo.MessageEmbedFooter{
+				Text: "Created: ",
+			},
+		}
+		msg := discordgo.MessageSend{
+			Content: member.Mention(),
+			Embed:   &e,
+		}
+		_, err = s.ChannelMessageSendComplex(channel.ID, &msg)
+		if err != nil {
+			log.Println(err)
+		}
+	}
+	processQuery = "UPDATE tasks SET processing = false WHERE id = $1"
+	_, err = Database.Exec(processQuery, task.ID)
+	if err != nil {
+		log.Println(err)
+	}
+
+}
+
+func getTasksToRun() []Task {
+	query := "SELECT id, type, content, guild_id, channel_id, user_id, creation_time, trigger_time " +
+		"from tasks where completed is false and processing is false and trigger_time < $1"
+	res, err := Database.Query(query, time.Now())
+	if err != nil {
+		log.Println(err)
+	}
+	var tasks []Task
+	for res.Next() {
+		var t Task
+		err = res.Scan(&t.ID, &t.Type, &t.Content, &t.GuildID, &t.ChannelID, &t.UserID, &t.CreationTime, &t.TriggerTime)
+		if err != nil {
+			log.Println(err)
+		}
+		for _, task := range tasks {
+			if task.ID == t.ID {
+				continue
+			}
+		}
+		tasks = append(tasks, t)
+	}
+
+	return tasks
+}
+
+func ProcessTasks(s *discordgo.Session, interval int) {
+	for {
+		time.Sleep(time.Duration(interval * 1e9))
+
+		tasks := getTasksToRun()
+
+		if len(tasks) > 0 {
+			for _, t := range tasks {
+				go processTask(&t, s)
+			}
+		}
+	}
+}

utils/types.go

@@ -0,0 +1,10 @@
+package utils
+
+type Guild struct {
+	ID             string
+	WelcomeMessage string
+	GoodbyeMessage string
+	LoggingChannel string
+	WelcomeChannel string
+	PuzzleChannel  string
+}