Added Trivia (#1600)

* added trivia

* added trivia

---------

Co-authored-by: Ashish Jhanwar <ashishjh-bst@users.noreply.github.com>

cmd/yagpdb/main.go

@@ -7,6 +7,7 @@ import (
 	"github.com/botlabs-gg/yagpdb/v2/common/prom"
 	"github.com/botlabs-gg/yagpdb/v2/common/run"
 	"github.com/botlabs-gg/yagpdb/v2/lib/confusables"
+	"github.com/botlabs-gg/yagpdb/v2/trivia"
 	"github.com/botlabs-gg/yagpdb/v2/web/discorddata"
 
 	// Core yagpdb packages
@@ -90,6 +91,7 @@ func main() {
 	internalapi.RegisterPlugin()
 	prom.RegisterPlugin()
 	featureflags.RegisterPlugin()
+	trivia.RegisterPlugin()
 
 	// Register confusables replacer
 	confusables.Init()

common/config.go

@@ -35,6 +35,7 @@ var (
 	ConfLargeBotShardingEnabled = config.RegisterOption("yagpdb.large_bot_sharding", "Set to enable large bot sharding (for 200k+ guilds)", false)
 	ConfBucketsPerNode          = config.RegisterOption("yagpdb.shard.buckets_per_node", "Number of buckets per node", 8)
 	ConfShardBucketSize         = config.RegisterOption("yagpdb.shard.shard_bucket_size", "Shards per bucket", 2)
+	ConfHttpProxy               = config.RegisterOption("yagpdb.http.proxy", "Proxy Url", "")
 
 	BotOwners []int64
 )

common/util.go

@@ -3,6 +3,7 @@ package common
 import (
 	"bytes"
 	"database/sql"
+	"encoding/base64"
 	"fmt"
 	"math/rand"
 	"path/filepath"
@@ -675,3 +676,11 @@ func ParseCodeblock(input string) string {
 	logger.Debugf("Returning %s", parts[1])
 	return parts[1]
 }
+
+func Base64DecodeToString(str string) (string, error) {
+	data, err := base64.StdEncoding.DecodeString(str)
+	if err != nil {
+		return "", err
+	}
+	return string(data), nil
+}

trivia/questions.go

@@ -0,0 +1,95 @@
+package trivia
+
+import (
+	"encoding/json"
+	"fmt"
+	"math/rand"
+	"net/http"
+	"net/url"
+
+	"github.com/botlabs-gg/yagpdb/v2/commands"
+	"github.com/botlabs-gg/yagpdb/v2/common"
+)
+
+type TriviaQuestion struct {
+	Question string   `json:"question"`
+	Answer   string   `json:"correct_answer"`
+	Category string   `json:"category"`
+	Options  []string `json:"incorrect_answers"`
+}
+
+type TriviaResponse struct {
+	Code      int               `json:"response_code"`
+	Questions []*TriviaQuestion `json:"results"`
+}
+
+func FetchQuestions(amount int) ([]*TriviaQuestion, error) {
+	client := &http.Client{}
+	proxy := common.ConfHttpProxy.GetString()
+	if len(proxy) > 0 {
+		proxyUrl, err := url.Parse(proxy)
+		if err == nil {
+			client.Transport = &http.Transport{
+				Proxy: http.ProxyURL(proxyUrl),
+			}
+		} else {
+			logger.WithError(err).Error("Invalid Proxy URL, getting questions without proxy, request maybe ratelimited")
+		}
+	}
+
+	url := fmt.Sprintf("https://opentdb.com/api.php?amount=%d&encode=base64", amount)
+	req, err := http.NewRequest("GET", url, nil)
+	if err != nil {
+		return nil, err
+	}
+
+	resp, err := client.Do(req)
+	if err != nil {
+		return nil, err
+	}
+	defer resp.Body.Close()
+
+	if resp.StatusCode != http.StatusOK {
+		return nil, commands.NewPublicError("Failed Getting Questions from opentdb")
+	}
+
+	var triviaResponse TriviaResponse
+	err = json.NewDecoder(resp.Body).Decode(&triviaResponse)
+	if err != nil {
+		return nil, err
+	}
+
+	if triviaResponse.Code != 0 {
+		return nil, commands.NewPublicError("Error from Trivia API")
+	}
+
+	for _, question := range triviaResponse.Questions {
+		question.Decode()
+		question.RandomizeOptionOrder()
+	}
+
+	return triviaResponse.Questions, nil
+}
+
+func (q *TriviaQuestion) Decode() {
+	q.Question, _ = common.Base64DecodeToString(q.Question)
+	q.Answer, _ = common.Base64DecodeToString(q.Answer)
+	q.Category, _ = common.Base64DecodeToString(q.Category)
+	for index, option := range q.Options {
+		q.Options[index], _ = common.Base64DecodeToString(option)
+	}
+}
+
+// RandomizeOptionOrder randomizes the option order and returns the result
+// this also adds the answer to the list of options
+func (q *TriviaQuestion) RandomizeOptionOrder() {
+	cop := make([]string, len(q.Options)+1)
+	copy(cop, q.Options)
+	cop[len(cop)-1] = q.Answer
+
+	rand.Shuffle(len(cop), func(i, j int) {
+		cop[i], cop[j] = cop[j], cop[i]
+	})
+
+	q.Options = cop
+}

trivia/trivia.go

@@ -0,0 +1,19 @@
+package trivia
+
+import "github.com/botlabs-gg/yagpdb/v2/common"
+
+type Plugin struct{}
+
+func (p *Plugin) PluginInfo() *common.PluginInfo {
+	return &common.PluginInfo{
+		Name:     "Trivia",
+		SysName:  "trivia",
+		Category: common.PluginCategoryMisc,
+	}
+}
+
+var logger = common.GetPluginLogger(&Plugin{})
+
+func RegisterPlugin() {
+	common.RegisterPlugin(&Plugin{})
+}