Add artist lookup by genre

[brackets.git] / routes / artist / artist.go

diff --git a/routes/artist/artist.go b/routes/artist/artist.go
index c3029d5..e6eb320 100644 (file)
--- a/routes/artist/artist.go
+++ b/routes/artist/artist.go
@@ -1,13 +1,73 @@
 package artist
 
 import (
+       "encoding/json"
        "git.jacobcasper.com/brackets/env"
        "git.jacobcasper.com/brackets/routes"
+       "git.jacobcasper.com/brackets/types"
        "github.com/zmb3/spotify"
        "log"
        "net/http"
 )
 
+func Index(env *env.Env) routes.Handler {
+       return func(w http.ResponseWriter, r *http.Request) {
+               if r.Method != "GET" {
+                       http.Error(w, http.StatusText(http.StatusMethodNotAllowed), http.StatusMethodNotAllowed)
+                       return
+               }
+
+               w.Header().Set("Content-Type", "application/json")
+
+               artistId := r.FormValue("id")
+               if artistId != "" {
+                       artist := types.Artist{}
+                       row := env.Db.Db.QueryRow("SELECT ID, NAME FROM ARTIST WHERE ID = ?", artistId)
+                       if err := row.Scan(&artist.ID, &artist.Name); err != nil {
+                               http.Error(w, http.StatusText(http.StatusInternalServerError), http.StatusInternalServerError)
+                               return
+                       }
+                       b, err := json.Marshal(artist)
+                       if err != nil {
+                               log.Print(err)
+                               http.Error(w, http.StatusText(http.StatusInternalServerError), http.StatusInternalServerError)
+                               return
+                       }
+                       w.Write(b)
+                       return
+               }
+
+               rows, err := env.Db.Db.Query("SELECT ID, NAME FROM ARTIST LIMIT 20")
+               if err != nil {
+                       http.Error(w, http.StatusText(http.StatusInternalServerError), http.StatusInternalServerError)
+                       return
+               }
+               defer rows.Close()
+
+               artists := make([]types.Artist, 0)
+               for rows.Next() {
+                       artist := types.Artist{}
+                       if err := rows.Scan(&artist.ID, &artist.Name); err != nil {
+                               http.Error(w, http.StatusText(http.StatusInternalServerError), http.StatusInternalServerError)
+                               return
+                       }
+                       artists = append(artists, artist)
+               }
+               if err = rows.Err(); err != nil {
+                       log.Print(err)
+                       http.Error(w, http.StatusText(http.StatusInternalServerError), http.StatusInternalServerError)
+                       return
+               }
+               b, err := json.Marshal(artists)
+               if err != nil {
+                       log.Print(err)
+                       http.Error(w, http.StatusText(http.StatusInternalServerError), http.StatusInternalServerError)
+                       return
+               }
+               w.Write(b)
+       }
+}
+
 func Add(env *env.Env) routes.Handler {
        return func(w http.ResponseWriter, r *http.Request) {
                if r.Method != "POST" {
@@ -35,7 +95,7 @@ func Add(env *env.Env) routes.Handler {
                env.Db.Db.Exec("INSERT INTO ARTIST (ID, NAME) VALUES (?, ?)", artist.ID, artist.Name)
 
                for _, genre := range artist.Genres {
-                       result, err := env.Db.Db.Exec("REPLACE INTO GENRE (NAME) VALUES (?)", genre)
+                       result, err := env.Db.Db.Exec("INSERT OR IGNORE INTO GENRE (NAME) VALUES (?)", genre)
                        if err != nil {
                                log.Printf("Failed to insert genre %s: %s", genre, err.Error())
                                http.Error(w, http.StatusText(http.StatusInternalServerError), http.StatusInternalServerError)
@@ -54,3 +114,46 @@ func Add(env *env.Env) routes.Handler {
                w.WriteHeader(http.StatusCreated)
        }
 }
+
+func ByGenre(env *env.Env) routes.Handler {
+       return func(w http.ResponseWriter, r *http.Request) {
+               if r.Method != "GET" {
+                       http.Error(w, http.StatusText(http.StatusMethodNotAllowed), http.StatusMethodNotAllowed)
+                       return
+               }
+
+               w.Header().Set("Content-Type", "application/json")
+               genreName := r.FormValue("genre_name")
+               if genreName != "" {
+                       rows, err := env.Db.Db.Query("SELECT ID, NAME FROM ARTIST WHERE ID IN (SELECT ARTIST_ID FROM ARTIST_GENRE_XREF WHERE GENRE_ID IN (SELECT ID FROM GENRE WHERE NAME = lower(?))) LIMIT 20", genreName)
+                       if err != nil {
+                               log.Print(err)
+                               http.Error(w, http.StatusText(http.StatusInternalServerError), http.StatusInternalServerError)
+                               return
+                       }
+                       defer rows.Close()
+
+                       artists := make([]types.Artist, 0)
+                       for rows.Next() {
+                               artist := types.Artist{}
+                               if err := rows.Scan(&artist.ID, &artist.Name); err != nil {
+                                       http.Error(w, http.StatusText(http.StatusInternalServerError), http.StatusInternalServerError)
+                                       return
+                               }
+                               artists = append(artists, artist)
+                       }
+                       if err = rows.Err(); err != nil {
+                               log.Print(err)
+                               http.Error(w, http.StatusText(http.StatusInternalServerError), http.StatusInternalServerError)
+                               return
+                       }
+                       b, err := json.Marshal(artists)
+                       if err != nil {
+                               log.Print(err)
+                               http.Error(w, http.StatusText(http.StatusInternalServerError), http.StatusInternalServerError)
+                               return
+                       }
+                       w.Write(b)
+               }
+       }
+}