140 lines
3.7 KiB
Go
140 lines
3.7 KiB
Go
package main
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import (
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"errors"
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"log"
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"net/http"
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"os"
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"github.com/gin-contrib/cors"
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"github.com/gin-gonic/gin"
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"github.com/glebarez/sqlite"
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"github.com/joho/godotenv"
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"gorm.io/gorm"
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"gorm.io/gorm/clause"
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"log101-blog-services/middleware"
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)
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var db *gorm.DB
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// Emoji counts for each post are retrieved in this format
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type PostReaction struct {
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Emoji string
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TotalCount int
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}
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type EmojiReaction struct {
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UserAnonIp string `gorm:"index:idx_anon,unqiue"`
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PostId string `gorm:"index:idx_anon,unique"`
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Emoji string
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}
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// Get the emoji counts foe a given post id
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func countEmojis(postId string) (map[string]int, error) {
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postReactions := []PostReaction{}
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// Get the emoji counts for each emoji
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rows := db.Model(&EmojiReaction{}).Where("post_id = ?", postId).Select([]string{"emoji", "COUNT(*) as total_count"}).Group("emoji").Find(&postReactions)
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if rows.Error != nil {
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return nil, errors.New("couldn't get emoji counts")
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}
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// Transform rows to map
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result := make(map[string]int)
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for _, reaction := range postReactions {
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result[reaction.Emoji] = reaction.TotalCount
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}
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return result, nil
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}
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func main() {
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// Load environment variables
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err := godotenv.Load()
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if err != nil {
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log.Fatal("Error loading .env file")
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}
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dbPath := os.Getenv("DB_PATH")
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db, err = gorm.Open(sqlite.Open(dbPath), &gorm.Config{})
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if err != nil {
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panic("failed to connect database")
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}
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db.AutoMigrate(&EmojiReaction{})
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r := gin.Default()
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r.LoadHTMLGlob("templates/*")
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// CORS configuration
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corsConfig := cors.DefaultConfig()
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corsConfig.AllowOrigins = []string{"https://log101.dev", "http://blog.log101.local", "https://blog.log101.dev"}
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ginMode := gin.Mode()
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if ginMode == gin.DebugMode {
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corsConfig.AllowOrigins = append(corsConfig.AllowOrigins, "http://localhost:4321")
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}
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corsConfig.AllowHeaders = []string{"hx-current-url", "hx-request", "hx-target", "hx-trigger"}
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// Middlewares
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r.Use(cors.New(corsConfig))
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r.Use(middleware.AnonymizeIPMiddleware())
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blogForm := r.Group("/blog/api/")
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{
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// Get the emoji form, you must provide postId query parameter
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blogForm.GET("/forms/emoji", func(c *gin.Context) {
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postId := c.Query("postId")
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// get emoji counts for each emoji
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emojiCounter, err := countEmojis(postId)
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if err != nil {
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c.HTML(http.StatusOK, "emoji_form.tmpl", gin.H{"error": "error getting the emoji counts"})
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return
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}
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// Return the html template
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c.HTML(http.StatusOK, "emoji_form.tmpl", gin.H{
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"results": emojiCounter,
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})
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})
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// Update the user's reaction to post, this handler will
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// add a new entry to the database with anonymized ip
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// updates if user reacted before
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blogForm.POST("/forms/emoji/post", func(c *gin.Context) {
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reactedPostId := c.PostForm("postId")
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reaction := c.PostForm("emojiInput")
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// Check if parameters are missing
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if reactedPostId == "" || reaction == "" {
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c.HTML(http.StatusOK, "emoji_form.tmpl", gin.H{"error": "missing parameters"})
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return
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}
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// Add the new emoji reaction to the database
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result := db.Clauses(clause.OnConflict{
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DoUpdates: clause.AssignmentColumns([]string{"emoji"}),
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}).Create(&EmojiReaction{UserAnonIp: c.Request.RemoteAddr, Emoji: reaction, PostId: reactedPostId})
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if result.Error != nil {
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c.HTML(http.StatusOK, "emoji_form.tmpl", gin.H{"error": "error writing to database"})
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return
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}
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// get emoji counts for each emoji
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emojiCounter, err := countEmojis(reactedPostId)
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if err != nil {
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c.HTML(http.StatusOK, "emoji_form.tmpl", gin.H{"error": "error getting the emoji counts"})
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return
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}
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// Return the html with the updated emoji counter
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c.HTML(http.StatusOK, "emoji_form.tmpl", gin.H{"results": emojiCounter})
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})
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}
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r.Run(":8000")
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}
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