Initial commit

backend/index.js

@@ -0,0 +1,157 @@
+const express=require('express');
+const cors=require('cors');
+const sqlite3=require('sqlite3');
+
+const app=express();
+const db=new sqlite3.Database('./chinook.db');
+app.use(cors());
+app.use(express.json());
+app.use(express.urlencoded({extended:true}));
+
+app.listen(8000,()=>{console.log("Running")});
+
+app.get('/',(req,res)=>{
+    res.send("Chinook adatbázis");
+})
+
+
+app.get('/genres',(req,res)=>{
+    db.all("select * from genres"
+    ,(error,rows)=>{
+        if(error){
+            res.status(400).json(error);
+        }
+        res.status(200).json(rows);
+
+    });
+
+});
+app.get('/artists',(req,res)=>{
+    db.all("select * from artists"
+    ,(error,rows)=>{
+        if(error){
+            res.status(400).json(error);
+        }
+        res.status(200).json(rows);
+
+    });
+
+});
+
+app.post('/genres',(req,res)=>{
+    const name=req.body.name;
+    db.run("insert into genres (Name) values(?)"
+    ,[name]
+    ,function (error){
+        if(error){
+            res.status(400).json(error.message);
+        }
+        console.log(this.lastID);
+      
+        res.status(201).json({message:"Beszúrás rendben "+this.lastID});
+        
+
+    });
+});
+
+app.post('/artist',(req,res)=>{
+    const name=req.body.name;
+    db.run("insert into artists (Name) values(?)"
+    ,[name]
+    ,function (error){
+        if(error){
+            res.status(400).json(error.message);
+        }
+        console.log(this.lastID);
+      
+        res.status(201).json({message:"Beszúrás rendben "+this.lastID});
+        
+
+    });
+
+});
+
+
+
+
+app.get('/artist-albums/:artist',(req,res)=>{
+    const artist=req.params.artist;
+
+    db.all("select Title from albums,artists where albums.ArtistId=artists.ArtistId and artists.Name=?"
+    ,[artist]
+    ,(error,rows)=>{
+        if(error){
+            res.status(400).json(error.message);
+        }
+        if(rows.length>0){
+            res.status(200).json(rows);     
+        } else {
+            res.status(200).json({message:"Az előadónak nincs albuma"});     
+        }
+                                                    
+        
+    });
+
+});
+
+app.get('/artistcount',(req,res)=>{
+    db.all("select count(*) as db,name from artists,albums where artists.ArtistId=albums.ArtistId group by name"
+    
+    ,(error,rows)=>{
+        if(error){
+            res.status(400).json(error.message);
+        }
+        if(rows.length>0){
+            res.status(200).json(rows);     
+        } else {
+            res.status(200).json({message:"Nincs ilyen!"});     
+        }
+                                                   
+        
+    });
+
+
+});
+
+app.get('/artist-albums-tracks/artist/:artist',(req,res)=>{
+    const artist=req.params.artist;
+    db.all(`select artists.Name,albums.Title as 'album',tracks.Name as 'track',genres.Name as 'genre'
+    from artists,albums,tracks,genres,media_types
+    where artists.ArtistId=albums.ArtistId
+    and
+    albums.AlbumId=tracks.AlbumId
+    and
+    tracks.GenreId=genres.GenreId
+    and
+    tracks.MediaTypeId=media_types.MediaTypeId
+    and artists.Name=?`
+    ,[artist]
+    ,(error,rows)=>{
+        if(error){
+            res.status(400).json("Hiba"+error.message);
+        }
+        if(rows.length>0){
+            
+            res.status(200).json(rows);     
+        } else {
+            res.status(200).json({message:"Nincs ilyen!"});     
+        }
+                                                   
+        
+    });
+
+})
+app.delete('/genres/:id',(req,res)=>{
+    const id=req.params.id;
+    db.run("delete from genres where GenreId=?"
+    ,[id]
+    ,function(error){
+        if(error){
+            res.status(400).json({message:error.message});
+        } else if(this.changes===0){
+            res.status(404).json({message:"Nem található ilyen id-jú rekord"});
+        } else {
+            res.status(200).json({message:"Törlés sikeres"});
+        }
+    });
+})