Added class to fetch from database

Added a class with methods that will fetch data from the database using php files on the server

app/src/main/java/com/example/soulfood_assignment2/databaseInterface.java

+package com.example.soulfood_assignment2;
+
+import android.util.Log;
+import java.io.BufferedInputStream;
+import java.io.BufferedReader;
+import java.io.DataOutputStream;
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.InputStreamReader;
+import java.io.UnsupportedEncodingException;
+import java.net.HttpURLConnection;
+import java.net.URL;
+import java.net.URLEncoder;
+import java.util.ArrayList;
+import java.util.HashMap;
+
+public class databaseInterface {
+
+    public String getSongByID(String id) {
+        HashMap<String, String> params = new HashMap<>();
+        params.put("id", id);
+
+        StringBuilder sbParams = new StringBuilder();
+        int i = 0;
+        for (String key : params.keySet()) {
+            try {
+                if (i != 0){
+                    sbParams.append("&");
+                }
+                sbParams.append(key).append("=").append(URLEncoder.encode(params.get(key), "UTF-8"));
+
+            } catch (UnsupportedEncodingException e) {
+                e.printStackTrace();
+            }
+            i++;
+        }
+
+        String spotify = "failed to fetch from database";
+
+        try {
+            String url = "https://cs2s.yorkdc.net/~jade.woodward/mobile-app-development/getsongbyid.php";
+            URL urlObj = new URL(url);
+
+            HttpURLConnection conn = (HttpURLConnection) urlObj.openConnection();
+
+            conn.setDoOutput(true);
+            conn.setRequestMethod("POST");
+            conn.setRequestProperty("Accept-Charset", "UTF-8");
+
+            conn.setReadTimeout(10000);
+            conn.setConnectTimeout(15000);
+
+            conn.connect();
+
+            String paramsString = sbParams.toString();
+
+            DataOutputStream wr = new DataOutputStream(conn.getOutputStream());
+            wr.writeBytes(paramsString);
+            wr.flush();
+            wr.close();
+
+            try {
+                InputStream is = conn.getInputStream();
+                BufferedInputStream in = new BufferedInputStream(is);
+
+                BufferedReader reader = new BufferedReader(new InputStreamReader(in));
+                StringBuilder result = new StringBuilder();
+                String line;
+
+                while ((line = reader.readLine()) != null) {
+                    result.append(line);
+                }
+
+                spotify = result.toString();
+
+            } catch (IOException e) {
+                e.printStackTrace();
+            }
+
+            if (conn != null) {
+                conn.disconnect();
+            }
+        } catch (IOException e) {
+            e.printStackTrace();
+        }
+
+        return spotify;
+    }
+
+
+    public String getPlaylistSongIDsByID(String id) {
+        HashMap<String, String> params = new HashMap<>();
+        params.put("id", id);
+
+        StringBuilder sbParams = new StringBuilder();
+        int i = 0;
+        for (String key : params.keySet()) {
+            try {
+                if (i != 0){
+                    sbParams.append("&");
+                }
+                sbParams.append(key).append("=").append(URLEncoder.encode(params.get(key), "UTF-8"));
+
+            } catch (UnsupportedEncodingException e) {
+                e.printStackTrace();
+            }
+            i++;
+        }
+
+        String spotify = "failed to fetch from database";
+
+        try {
+            String url = "https://cs2s.yorkdc.net/~jade.woodward/mobile-app-development/getplaylistbyid.php";
+            URL urlObj = new URL(url);
+
+            HttpURLConnection conn = (HttpURLConnection) urlObj.openConnection();
+
+            conn.setDoOutput(true);
+            conn.setRequestMethod("POST");
+            conn.setRequestProperty("Accept-Charset", "UTF-8");
+
+            conn.setReadTimeout(10000);
+            conn.setConnectTimeout(15000);
+
+            conn.connect();
+
+            String paramsString = sbParams.toString();
+
+            DataOutputStream wr = new DataOutputStream(conn.getOutputStream());
+            wr.writeBytes(paramsString);
+            wr.flush();
+            wr.close();
+
+            try {
+                InputStream is = conn.getInputStream();
+                BufferedInputStream in = new BufferedInputStream(is);
+
+                BufferedReader reader = new BufferedReader(new InputStreamReader(in));
+                StringBuilder result = new StringBuilder();
+                String line;
+
+                while ((line = reader.readLine()) != null) {
+                    result.append(line);
+                }
+
+                spotify = result.toString();
+
+            } catch (IOException e) {
+                e.printStackTrace();
+            }
+
+            if (conn != null) {
+                conn.disconnect();
+            }
+        } catch (IOException e) {
+            e.printStackTrace();
+        }
+
+        return spotify;
+    }
+
+    public ArrayList<String> getPlaylistByID(String id) {
+        String songids = getPlaylistSongIDsByID(id);
+
+        ArrayList<String> ids = parseOutSpaces(songids);
+        ArrayList<String> spotifys = new ArrayList<>();
+
+        for (String indv: ids) {
+            String spotty = getSongByID(indv);
+            spotifys.add(spotty);
+        }
+
+        return spotifys;
+    }
+
+    private ArrayList<String> parseOutSpaces(String original) {
+        ArrayList<String> results = new ArrayList<>();
+
+        for(String id : original.split(" ")) {
+            results.add(id);
+        }
+
+        return results;
+    }
+
+}