Add capability to ignore channels (#14)

Dockerfile

@@ -1,5 +1,5 @@
 # Build Stage: Build bot using the alpine image, also install doppler in it
-FROM golang:1.18.2-alpine3.15 AS builder
+FROM golang:1.18-alpine AS builder
 RUN apk add --update --no-cache git
 WORKDIR /app
 COPY . .

README.md

@@ -25,6 +25,8 @@ Can be found on telegram as [@RestrictChannelRobot](https://telegram.dog/Restric
 # Variables
  ---------------
  - `BOT_TOKEN` - Get it from [@BotFather](https://t.me/BotFather)
+ - `DB_URI` - MongoDB Connection String
+ - `DB_NAME` - MongoDB Database Name
 -----------------
 
 * Some advanced configuration may also require other variables, but with just bot token you are good to go!

app.json

@@ -19,6 +19,16 @@
       "description": "Bot Token, Get It From @BotFather.",
       "value": "",
       "required": true
+    },
+    "DB_URI": {
+      "description": "MongoDB Connection String.",
+      "value": "",
+      "required": true
+    },
+    "DB_NAME": {
+      "description": "MongoDB Database Name.",
+      "value": "",
+      "required": true
     }
   },
   "buildpacks": [

config.go

@@ -14,6 +14,8 @@ var (
 	botToken      string
 	apiUrl        string
 	webhookUrl    string
+	databaseUrl   string
+	databaseName  string
 )
 
 func init() {
@@ -42,6 +44,9 @@ func init() {
 		"Port for the webhook",
 	)
 
+	flag.StringVar(&databaseUrl, "DB_URI", os.Getenv("DB_URI"), "Database URI for MongoDB")
+	flag.StringVar(&databaseName, "DB_NAME", os.Getenv("DB_NAME"), "Bot database name in MongoDB")
+
 	if apiUrl == "" {
 		apiUrl = "https://api.telegram.org"
 	}

db.go

@@ -0,0 +1,108 @@
+package main
+
+import (
+	"context"
+	"time"
+
+	log "github.com/sirupsen/logrus"
+	"go.mongodb.org/mongo-driver/bson"
+	"go.mongodb.org/mongo-driver/mongo"
+	"go.mongodb.org/mongo-driver/mongo/options"
+)
+
+type IgnoreList struct {
+	ChatId          int64   `bson:"_id,omitempty" json:"_id,omitempty"`
+	IgnoredChannels []int64 `bson:"ignored_channels" json:"ignored_channels"`
+}
+
+var (
+	mongoClient *mongo.Client
+
+	// Contexts
+	tdCtx = context.TODO()
+	bgCtx = context.Background()
+
+	// define collections
+	ignoreListCollection *mongo.Collection
+)
+
+func init() {
+	mongoClient, err := mongo.NewClient(
+		options.Client().ApplyURI(databaseUrl),
+	)
+	if err != nil {
+		log.Errorf("[Database][Client]: %v", err)
+	}
+
+	ctx, cancel := context.WithTimeout(bgCtx, 10*time.Second)
+	defer cancel()
+
+	err = mongoClient.Connect(ctx)
+	if err != nil {
+		log.Errorf("[Database][Connect]: %v", err)
+	}
+
+	// Open Connections to Collections
+	log.Info("Opening Database Collections...")
+	ignoreListCollection = mongoClient.Database(databaseName).Collection("ignore_list")
+}
+
+func updateOne(collecion *mongo.Collection, filter bson.M, data interface{}) (err error) {
+	_, err = collecion.UpdateOne(tdCtx, filter, bson.M{"$set": data}, options.Update().SetUpsert(true))
+	if err != nil {
+		log.Errorf("[Database][updateOne]: %v", err)
+	}
+	return
+}
+
+func findOne(collecion *mongo.Collection, filter bson.M) (res *mongo.SingleResult) {
+	res = collecion.FindOne(tdCtx, filter)
+	return
+}
+
+func getIgnoreSettings(chatID int64) *IgnoreList {
+	return _checkIgnoreSettings(chatID)
+}
+
+func _checkIgnoreSettings(chatID int64) (ignorerc *IgnoreList) {
+	defaultIgnoreSettings := &IgnoreList{ChatId: chatID, IgnoredChannels: make([]int64, 0)}
+
+	errS := findOne(ignoreListCollection, bson.M{"_id": chatID}).Decode(&ignorerc)
+	if errS == mongo.ErrNoDocuments {
+		ignorerc = defaultIgnoreSettings
+		err := updateOne(ignoreListCollection, bson.M{"_id": chatID}, defaultIgnoreSettings)
+		if err != nil {
+			log.Errorf("[Database][_checkIgnoreSettings]: %v ", err)
+		}
+	} else if errS != nil {
+		log.Errorf("[Database][_checkIgnoreSettings]: %v", errS)
+		ignorerc = defaultIgnoreSettings
+	}
+	return ignorerc
+}
+
+func ignoreChat(chatID, ignoreChannelId int64) {
+	ignorerc := _checkIgnoreSettings(chatID)
+	ignorerc.IgnoredChannels = append(
+		ignorerc.IgnoredChannels,
+		ignoreChannelId,
+	)
+	err := updateOne(ignoreListCollection, bson.M{"_id": chatID}, ignorerc)
+	if err != nil {
+		log.Errorf("[Database] ignoreChat: %v", err)
+	}
+}
+
+func unignoreChat(chatID, ignoreChannelId int64) {
+	ignorerc := _checkIgnoreSettings(chatID)
+	for i, v := range ignorerc.IgnoredChannels {
+		if v == ignoreChannelId {
+			ignorerc.IgnoredChannels = append(ignorerc.IgnoredChannels[:i], ignorerc.IgnoredChannels[i+1:]...)
+			break
+		}
+	}
+	err := updateOne(ignoreListCollection, bson.M{"_id": chatID}, ignorerc)
+	if err != nil {
+		log.Errorf("[Database] unignoreChat: %v", err)
+	}
+}

go.mod

@@ -3,4 +3,23 @@ module github.com/DivideProjects/GoLangTgBot
 // +heroku goVersion go1.18
 go 1.18
 
-require github.com/PaulSonOfLars/gotgbot/v2 v2.0.0-rc.8
+require (
+	github.com/PaulSonOfLars/gotgbot/v2 v2.0.0-rc.8
+	github.com/sirupsen/logrus v1.8.1
+	go.mongodb.org/mongo-driver v1.9.1
+)
+
+require (
+	github.com/go-stack/stack v1.8.0 // indirect
+	github.com/golang/snappy v0.0.1 // indirect
+	github.com/klauspost/compress v1.13.6 // indirect
+	github.com/pkg/errors v0.9.1 // indirect
+	github.com/xdg-go/pbkdf2 v1.0.0 // indirect
+	github.com/xdg-go/scram v1.0.2 // indirect
+	github.com/xdg-go/stringprep v1.0.2 // indirect
+	github.com/youmark/pkcs8 v0.0.0-20181117223130-1be2e3e5546d // indirect
+	golang.org/x/crypto v0.0.0-20201216223049-8b5274cf687f // indirect
+	golang.org/x/sync v0.0.0-20190911185100-cd5d95a43a6e // indirect
+	golang.org/x/sys v0.0.0-20191026070338-33540a1f6037 // indirect
+	golang.org/x/text v0.3.5 // indirect
+)

go.sum

@@ -1,2 +1,62 @@
 github.com/PaulSonOfLars/gotgbot/v2 v2.0.0-rc.8 h1:ISVCuGnT0yYmdlfhJ8LQS4G2UXf9SuDWpvTSH86Mh2I=
 github.com/PaulSonOfLars/gotgbot/v2 v2.0.0-rc.8/go.mod h1:r815fYWTudnU9JhtsJAxUtuV7QrSgKpChJkfTSMFpfg=
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