Added subday module with a subday handlers

.gitignore

@@ -1 +1,2 @@
 tokens/*token
+backups/*

main.go

@@ -7,6 +7,7 @@ import (
 	"galched-bot/modules/discord"
 	"galched-bot/modules/grace"
 	"galched-bot/modules/settings"
+	"galched-bot/modules/subday"
 
 	"go.uber.org/fx"
 )
@@ -25,14 +26,16 @@ type (
 
 func (s *silentPrinter) Printf(str string, i ...interface{}) {}
 
-func start(p appParam) {
+func start(p appParam) error {
 	var err error
 
 	log.Print("main: starting galched-bot v", p.Settings.Version)
 
 	err = p.Discord.Start()
 	if err != nil {
-		log.Fatal("discord: cannot start instance", err)
+		log.Print("discord: cannot start instance", err)
+		return err
+
 	}
 	log.Printf("main: discord instance running")
 	log.Printf("main: — — —")
@@ -42,17 +45,19 @@ func start(p appParam) {
 
 	err = p.Discord.Stop()
 	if err != nil {
-		log.Fatal("discord: cannot stop instance", err)
+		log.Print("discord: cannot stop instance", err)
+		return err
 	}
 
 	log.Print("main: galched bot successfully stopped")
+	return nil
 }
 
 func main() {
 	var err error
 	app := fx.New(
 		fx.Logger(new(silentPrinter)),
-		fx.Provide(settings.New, grace.New, discord.New),
+		fx.Provide(settings.New, grace.New, discord.New, subday.New),
 		fx.Invoke(start))
 
 	err = app.Start(context.Background())

modules/discord/discord.go

@@ -5,6 +5,7 @@ import (
 	"log"
 
 	"galched-bot/modules/settings"
+	"galched-bot/modules/subday"
 
 	"github.com/bwmarrin/discordgo"
 	"github.com/pkg/errors"
@@ -18,7 +19,7 @@ type (
 	}
 )
 
-func New(s *settings.Settings) (*Discord, error) {
+func New(s *settings.Settings, subday *subday.Subday) (*Discord, error) {
 	key := fmt.Sprintf("Bot %s", s.DiscordToken)
 	instance, err := discordgo.New(key)
 	if err != nil {
@@ -26,6 +27,9 @@ func New(s *settings.Settings) (*Discord, error) {
 	}
 
 	processor := NewProcessor(s.Version)
+	for _, subdayHandler := range SubdayHandlers(subday, s.PermittedRoles) {
+		processor.AddHandler(subdayHandler)
+	}
 
 	log.Printf("discord: added %d message handlers", len(processor.handlers))
 	if len(processor.handlers) > 0 {
@@ -45,6 +49,13 @@ func LogMessage(m *discordgo.MessageCreate) {
 	log.Printf("discord: msg [%s]: %s", m.Author.Username, m.Content)
 }
 
+func SendMessage(s *discordgo.Session, m *discordgo.MessageCreate, text string) {
+	_, err := s.ChannelMessageSend(m.ChannelID, text)
+	if err != nil {
+		log.Printf("discord: cannot send message [%s]: %v", text, err)
+	}
+}
+
 func (d *Discord) Start() error {
 	d.session.AddHandler(d.processor.Process)
 	return d.session.Open()

modules/discord/subdayhandlers.go

@@ -0,0 +1,150 @@
+package discord
+
+import (
+	"fmt"
+	"log"
+	"strings"
+
+	"galched-bot/modules/subday"
+
+	"github.com/bwmarrin/discordgo"
+)
+
+type SubdayListHandler struct {
+	subday *subday.Subday
+}
+
+func (h *SubdayListHandler) Signature() string {
+	return "!sublist"
+}
+func (h *SubdayListHandler) Description() string {
+	return "список игр для сабдея"
+}
+func (h *SubdayListHandler) IsValid(msg string) bool {
+	return msg == "!sublist"
+}
+func (h *SubdayListHandler) Handle(s *discordgo.Session, m *discordgo.MessageCreate) {
+	h.subday.RLock()
+	defer h.subday.RUnlock()
+	LogMessage(m)
+
+	c, err := s.State.Channel(m.ChannelID)
+	if err != nil {
+		log.Print("discord: cannot obtain state", err)
+		return
+	}
+	g, err := s.State.Guild(c.GuildID)
+	if err != nil {
+		log.Print("discord: cannot obtain guild", err)
+		return
+	}
+	message := "Игры предыдущих сабдеев:\n**20.10.18**: _DmC_ -> _Fable 1_ -> _Overcooked 2_\n" +
+		"**17.11.18**: _The Witcher_ -> _Xenus: Белое Золото_ -> _NFS: Underground 2_\n" +
+		"**22.12.18**: _True Crime: Streets of LA_ -> _Serious Sam 3_ -> _Kholat_\n" +
+		"**26.01.19**: _Disney’s Aladdin_ -> _~~Gothic~~_ -> _Scrapland_ -> _Donut County_\n\n" +
+		"Список игр для следующего сабдея:\n"
+	for k, v := range h.subday.Database() {
+		nickname := " "
+		for _, member := range g.Members {
+			if k == member.User.ID {
+				if member.Nick != "" {
+					nickname = member.Nick
+				} else {
+					nickname = member.User.Username
+				}
+			}
+		}
+		for _, game := range v {
+			message += fmt.Sprintf("   **- %s** от _%s_\n", game, nickname)
+		}
+	}
+	_, err = s.ChannelMessageSend(m.ChannelID, strings.Trim(message, "\n"))
+	if err != nil {
+		log.Printf("discord: cannot send message [%s]: %v", message, err)
+	}
+}
+
+type SubdayAddHandler struct {
+	subday *subday.Subday
+	roles  []string
+}
+
+func (h *SubdayAddHandler) Signature() string {
+	return "!subday <game-name>"
+}
+func (h *SubdayAddHandler) Description() string {
+	return "добавление игры в список сабдея"
+}
+func (h *SubdayAddHandler) IsValid(msg string) bool {
+	return strings.HasPrefix(msg, "!subday")
+}
+func (h *SubdayAddHandler) Handle(s *discordgo.Session, m *discordgo.MessageCreate) {
+	h.subday.Lock()
+	defer h.subday.Unlock()
+	LogMessage(m)
+
+	c, err := s.State.Channel(m.ChannelID)
+	if err != nil {
+		log.Print("discord: cannot obtain state", err)
+		return
+	}
+	g, err := s.State.Guild(c.GuildID)
+	if err != nil {
+		log.Print("discord: cannot obtain guild", err)
+		return
+	}
+	member, err := s.State.Member(g.ID, m.Author.ID)
+	if err != nil {
+		log.Print("discord: cannot obtain user role", err)
+		return
+	}
+
+	if g.Name != "AV" && g.Name != "Galched" {
+		log.Printf("discord: message from unsupported guild %s, ignore", g.Name)
+		return
+	}
+
+	permissionGranted := false
+loop:
+	for i := range member.Roles {
+		for j := range h.roles {
+			if member.Roles[i] == h.roles[j] {
+				permissionGranted = true
+				break loop
+			}
+		}
+	}
+
+	if permissionGranted {
+		game := strings.Trim(strings.Replace(m.Content, "!subday", "", 1), " ")
+		if game != "" {
+			gameList, ok := h.subday.Database()[m.Author.ID]
+			if ok && len(gameList) > 10 {
+				SendMessage(s, m, "Нельзя заказать больше 10 игр")
+				return
+			} else if ok {
+				for i := range gameList {
+					if game == gameList[i] {
+						SendMessage(s, m, "Эта игра уже заказана вами")
+						return
+					}
+				}
+			}
+			h.subday.Database()[m.Author.ID] = append(h.subday.Database()[m.Author.ID], game)
+			log.Printf("subday: game [%s] is added to subday database", game)
+			SendMessage(s, m, fmt.Sprintf("Игра \"%s\" добавлена в список", game))
+			h.subday.DumpToFile()
+		}
+	} else {
+		log.Print("subday: game is not added, insufficient rights")
+		SendMessage(s, m, "Заказ игр для сабдея доступен только для подписчиков канала (и Нифлая)")
+	}
+}
+
+func SubdayHandlers(s *subday.Subday, r []string) []MessageHandler {
+	var result []MessageHandler
+
+	addHandler := &SubdayAddHandler{s, r}
+	listHandler := &SubdayListHandler{s}
+	return append(result, addHandler, listHandler)
+}

modules/discord/testhandler.go

@@ -6,20 +6,20 @@ import (
 
 type testHandler struct{}
 
-var _ = (testHandler)(nil) // ignore unused warning
+var _ = testHandler{} // ignore unused warning
 
-func (t *testHandler) Signature() string {
+func (h *testHandler) Signature() string {
 	return "!test"
 }
 
-func (t *testHandler) Description() string {
+func (h *testHandler) Description() string {
 	return "тестовый хэндлер"
 }
 
-func (t *testHandler) IsValid(msg string) bool {
+func (h *testHandler) IsValid(msg string) bool {
 	return msg == "!test"
 }
 
-func (t *testHandler) Handle(s *discordgo.Session, m *discordgo.MessageCreate) {
+func (h *testHandler) Handle(s *discordgo.Session, m *discordgo.MessageCreate) {
 	LogMessage(m)
 }

modules/settings/settings.go

@@ -3,32 +3,43 @@ package settings
 import (
 	"io/ioutil"
 	"log"
-	"os"
-
-	"github.com/pkg/errors"
+	"time"
 )
 
 const (
-	version          = "3.0.0"
-	discordTokenPath = "./tokens/.discordtoken"
+	version            = "3.0.0"
+	discordTokenPath   = "./tokens/.discordtoken"
+	subdayDataPath     = "./backups/subday"
+	subdayDataDuration = 10 // in seconds
+
+	// Permitted roles in discord for subday
+	subRole1    = "433672344737677322"
+	subRole2    = "433680494635515904"
+	galchedRole = "301467455497175041"
+	smorcRole   = "301470784491356172"
 )
 
 type (
 	Settings struct {
-		Version      string
-		DiscordToken string
+		Version           string
+		DiscordToken      string
+		SubdayDataPath    string
+		SubdayJobDuration time.Duration
+		PermittedRoles    []string
 	}
 )
 
 func New() (*Settings, error) {
-	log.Print(os.Getwd())
 	discordToken, err := ioutil.ReadFile(discordTokenPath)
 	if err != nil {
-		return nil, errors.Wrap(err, "cannot read discord token file")
+		log.Print("settings: cannot read discord token file", err)
 	}
 
 	return &Settings{
-		Version:      version,
-		DiscordToken: string(discordToken),
+		Version:           version,
+		DiscordToken:      string(discordToken),
+		SubdayDataPath:    subdayDataPath,
+		SubdayJobDuration: subdayDataDuration * time.Second,
+		PermittedRoles:    []string{subRole1, subRole2, galchedRole, smorcRole},
 	}, nil
 }

modules/subday/subday.go

@@ -0,0 +1,73 @@
+package subday
+
+import (
+	"encoding/json"
+	"fmt"
+	"io/ioutil"
+	"log"
+	"os"
+	"sync"
+
+	"galched-bot/modules/settings"
+)
+
+type Subday struct {
+	sync.RWMutex
+	path     string
+	database map[string][]string
+}
+
+func New(s *settings.Settings) (*Subday, error) {
+	var (
+		err  error
+		data = make(map[string][]string)
+	)
+
+	subdayData, err := ioutil.ReadFile(s.SubdayDataPath)
+	if err != nil {
+		log.Print("subday: cannot read subday data file", err)
+		log.Print("subday: creating new subday database")
+	} else {
+		err = json.Unmarshal(subdayData, &data)
+		if err != nil {
+			data = make(map[string][]string)
+			log.Print("subday: cannot unmarshal subday data file", err)
+			log.Print("subday: creating new subday database")
+		} else {
+			log.Print("subday: using previously saved subday database")
+		}
+	}
+
+	subday := &Subday{
+		RWMutex:  sync.RWMutex{},
+		path:     s.SubdayDataPath,
+		database: data,
+	}
+	return subday, nil
+}
+
+func (s *Subday) Database() map[string][]string {
+	return s.database
+}
+
+func (s *Subday) DumpToFile() {
+	data, err := json.Marshal(s.database)
+	if err != nil {
+		log.Print("subday: cannot marshal database file", err)
+		return
+	}
+	file, err := os.Create(s.path)
+	if err != nil {
+		log.Print("subday: cannot open database file", err)
+		return
+	}
+	_, err = fmt.Fprintf(file, string(data))
+	if err != nil {
+		log.Print("subday: cannot write to database file")
+	}
+	err = file.Close()
+	if err != nil {
+		log.Print("subday: cannot close database file")
+	}
+	log.Print("subday: database dumped to file")
+}