go: Refactor admin commands

GoBot/discord/config/translate.go

@@ -0,0 +1,25 @@
+package config
+
+//==Message Util==
+const UsageTitle = "使用方法Command Usage"
+const UsageColour = 0xF00000
+const ErrorStack = "纠错信息Debug Info"
+const SuccessTitle = "成功Success"
+const SuccessColour = 0x00E000
+
+//==Commands==
+const SendAsUsage = "!sendas <频道ID> <信息>\n!sendas <channel ID> <message>"
+const SendAsSuccessfulDescription = "成功发送该信息。\nSent the message successfully."
+const SendAsSuccessfulMessageID = "Discord编号 // Discord ID"
+
+const EditAsUsage = "!editas <频道ID> <信息ID> <信息>\n!editas <channel ID> <message ID> <message>"
+const EditAsSuccessfulDescription = "成功编辑该信息。\nEdited the message successfully."
+
+//VTL is view trust level
+const VTLColour = 0xE0E000
+const VTLSingleUserTitle = "<@%s>的信誉分 <@%s>'s Trust Score"
+const VTLSingleUserValue = "分数 Trust Score"
+const VTLSingleUserServerTotal = "伺服器总分 Server Total"
+const VTLSingleUserPercentage = "百分比 Percentage"
+const VTLGlobalTitle = "伺服器信誉分报告 Server Trust Score Report"
+const VTLGlobalFieldFormat = "%.1f/%.1f (%.2f%%)"

GoBot/discord/modules/admin.go

@@ -2,86 +2,99 @@ package modules
 
 import (
 	"fmt"
-	"strings"
 
 	"github.com/bwmarrin/discordgo"
 
 	"TerraOceanBot/discord/backend"
+	"TerraOceanBot/discord/config"
 )
 
 //adminID is my Discord user ID (chanbakjsd#7968).
 const adminID = "218983355746746369"
 
-func sendAs(s *discordgo.Session, m *discordgo.MessageCreate, command []string) {
+func adminOnly(passOn CommandHandler) CommandHandler {
+	return func(s *discordgo.Session, m *discordgo.MessageCreate, command []string) {
 		if m.Author.ID != adminID {
 			return
 		}
-	if len(command) < 3 {
-		return
-	}
-	message := strings.SplitN(m.Content, " ", 3)
-	msg, err := s.ChannelMessageSend(message[1], message[2])
-	if err != nil {
-		s.ChannelMessageSend(m.ChannelID, err.Error())
+		passOn(s, m, command)
 	}
-	s.ChannelMessageSend(m.ChannelID, "The message has been sent. Discord ID: "+msg.ID)
 }
 
-func editAs(s *discordgo.Session, m *discordgo.MessageCreate, command []string) {
-	if m.Author.ID != adminID {
-		return
-	}
-	if len(command) < 4 {
-		return
-	}
-	message := strings.SplitN(m.Content, " ", 4)
-	_, err := s.ChannelMessageEdit(message[1], message[2], message[3])
+var sendAs = adminOnly(enforceArgumentCount(config.SendAsUsage, 3,
+	//!sendas <channel ID> <message>
+	func(s *discordgo.Session, m *discordgo.MessageCreate, command []string) {
+		msg, err := s.ChannelMessageSend(command[1], command[2])
 		if err != nil {
-		s.ChannelMessageSend(m.ChannelID, err.Error())
-	}
-	s.ChannelMessageSend(m.ChannelID, "The message has been edited.")
+			sendError(s, m.ChannelID, err)
+			return
 		}
+		initNewEmbed(config.SuccessTitle, config.SendAsSuccessfulDescription, config.SuccessColour).
+			AddField(config.SendAsSuccessfulMessageID, msg.ID).
+			Send(s, m.ChannelID)
+	},
+))
 
-func viewTrustLevel(s *discordgo.Session, m *discordgo.MessageCreate, command []string) {
-	if m.Author.ID != adminID {
+var editAs = adminOnly(enforceArgumentCount(config.EditAsUsage, 4,
+	//!editas <channel ID> <message ID> <message>
+	func(s *discordgo.Session, m *discordgo.MessageCreate, command []string) {
+		_, err := s.ChannelMessageEdit(command[1], command[2], command[3])
+		if err != nil {
+			sendError(s, m.ChannelID, err)
 			return
 		}
+		initNewEmbed(config.SuccessTitle, config.EditAsSuccessfulDescription, config.SuccessColour).
+			Send(s, m.ChannelID)
+	},
+))
+
+var viewTrustLevel = adminOnly(func(s *discordgo.Session, m *discordgo.MessageCreate, command []string) {
 	if len(command) > 1 {
 		value, err := backend.GetTrust(s, command[1])
 		if err != nil {
-			s.ChannelMessageSend(m.ChannelID, err.Error())
+			sendError(s, m.ChannelID, err)
 			return
 		}
 		total, err := backend.GetTotalTrust(s)
 		if err != nil {
-			s.ChannelMessageSend(m.ChannelID, err.Error())
+			sendError(s, m.ChannelID, err)
 			return
 		}
-		s.ChannelMessageSend(m.ChannelID, fmt.Sprintf("Trust level is %.1f/%.1f (%.2f%%) for user <@%d>.", value, total, value/total*100, command[1]))
+		newEmbed().SetColour(config.VTLColour).
+			SetTitle(fmt.Sprintf(config.VTLSingleUserTitle, command[1], command[1])).
+			AddField(config.VTLSingleUserValue, formatFloat(value, 1)).
+			AddField(config.VTLSingleUserServerTotal, formatFloat(total, 1)).
+			AddField(config.VTLSingleUserPercentage, formatFloat(value/total*100, 2)).
+			Send(s, m.ChannelID)
 		return
 	}
 
 	total, err := backend.GetTotalTrust(s)
 	if err != nil {
-		s.ChannelMessageSend(m.ChannelID, err.Error())
+		sendError(s, m.ChannelID, err)
 		return
 	}
-	message := ""
 	members, err := backend.GetAllMembers(s)
 	if err != nil {
-		s.ChannelMessageSend(m.ChannelID, err.Error())
+		sendError(s, m.ChannelID, err)
 		return
 	}
+
+	//Generate message
+	message := newEmbed().SetColour(config.VTLColour).SetTitle(config.VTLGlobalTitle)
 	for _, v := range members {
 		value, err := backend.GetTrust(s, v.User.ID)
 		if err == backend.ErrNotMember {
 			continue
 		}
 		if err != nil {
-			s.ChannelMessageSend(m.ChannelID, err.Error())
+			sendError(s, m.ChannelID, err)
 			return
 		}
-		message += fmt.Sprintf("%s#%s - %.1f/%.1f (%.2f%%)\n", v.User.Username, v.User.Discriminator, value, total, value/total*100)
-	}
-	s.ChannelMessageSend(m.ChannelID, message)
+		message.AddInlineField(
+			v.User.Username+"#"+v.User.Discriminator,
+			fmt.Sprintf(config.VTLGlobalFieldFormat, value, total, value/total*100),
+		)
 	}
+	message.Send(s, m.ChannelID)
+})

GoBot/discord/modules/commands.go

@@ -2,9 +2,10 @@ package modules
 
 import "github.com/bwmarrin/discordgo"
 
+type CommandHandler func(s *discordgo.Session, m *discordgo.MessageCreate, commands []string)
 type Command struct {
 	Name    string
-	Handler func(s *discordgo.Session, m *discordgo.MessageCreate, commands []string)
+	Handler CommandHandler
 }
 
 var Commands = []Command{

GoBot/discord/modules/embed.go

@@ -10,9 +10,15 @@ func newEmbed() *embed {
 	return &embed{&discordgo.MessageEmbed{}}
 }
 
-func (e *embed) Errorify() *embed {
+func initNewEmbed(title, description string, colour int) *embed {
+	return newEmbed().SetTitle(title).SetDescription(description).SetColour(colour)
+}
+
+func initNewErrorEmbed(description string) *embed {
+	e := newEmbed()
 	e.Color = 0xE00000
 	e.Title = "发生错误！An error has occurred!"
+	e.Description = description
 	return e
 }
 
@@ -39,6 +45,19 @@ func (e *embed) AddField(name, value string) *embed {
 	return e
 }
 
+func (e *embed) AddInlineField(name, value string) *embed {
+	e.Fields = append(e.Fields, &discordgo.MessageEmbedField{
+		Name:   name,
+		Value:  value,
+		Inline: true,
+	})
+	return e
+}
+
 func (e *embed) Build() *discordgo.MessageEmbed {
 	return e.MessageEmbed
 }
+
+func (e *embed) Send(s *discordgo.Session, channelID string) {
+	s.ChannelMessageSendEmbed(channelID, e.Build())
+}

GoBot/discord/modules/messageutil.go

@@ -2,6 +2,9 @@ package modules
 
 import (
 	"fmt"
+	"runtime"
+	"strconv"
+	"strings"
 
 	"github.com/bwmarrin/discordgo"
 
@@ -76,3 +79,31 @@ func auditLog(s *discordgo.Session, message string) {
 		fmt.Println(err)
 	}
 }
+
+func enforceArgumentCount(usage string, count int, passOn CommandHandler) CommandHandler {
+	return func(s *discordgo.Session, m *discordgo.MessageCreate, command []string) {
+		if len(command) < count {
+			s.ChannelMessageSendEmbed(
+				m.ChannelID,
+				newEmbed().SetTitle(config.UsageTitle).SetDescription(usage).SetColour(config.UsageColour).Build(),
+			)
+			return
+		}
+		command[count-1] = strings.Join(command[count-1:], " ")
+		passOn(s, m, command[:count])
+	}
+}
+
+func sendError(s *discordgo.Session, channelID string, err error) {
+	stackCache := make([]byte, 512)
+	count := runtime.Stack(stackCache, false)
+	stack := string(stackCache[:count])
+	if count == 512 {
+		stack += "..."
+	}
+	initNewErrorEmbed(err.Error()).AddField(config.ErrorStack, stack).Send(s, channelID)
+}
+
+func formatFloat(n float64, precision int) string {
+	return strconv.FormatFloat(n, 'f', precision, 64)
+}