Merge pull request #450 from B0pol/fileutils

create FileUtils

extractor/src/test/java/org/schabi/newpipe/FileUtils.java

@@ -0,0 +1,79 @@
+package org.schabi.newpipe;
+
+import com.grack.nanojson.JsonArray;
+import com.grack.nanojson.JsonObject;
+import com.grack.nanojson.JsonWriter;
+
+import java.io.BufferedWriter;
+import java.io.File;
+import java.io.FileWriter;
+import java.io.IOException;
+import java.nio.file.Files;
+import java.nio.file.Paths;
+
+/**
+ * Util class to write file to disk
+ * <p>
+ * Can be used to debug and test, for example writing a service's JSON response
+ * (especially useful if the response provided by the service is not documented)
+ */
+public class FileUtils {
+
+    public static void createFile(String path, JsonObject content) throws IOException {
+        createFile(path, jsonObjToString(content));
+    }
+
+    public static void createFile(String path, JsonArray array) throws IOException {
+        createFile(path, jsonArrayToString(array));
+    }
+
+    /**
+     * Create a file given a path and its content. Create subdirectories if needed
+     *
+     * @param path    the path to write the file, including the filename (and its extension)
+     * @param content the content to write
+     * @throws IOException
+     */
+    public static void createFile(final String path, final String content) throws IOException {
+        final String[] dirs = path.split("/");
+        if (dirs.length > 1) {
+            String pathWithoutFileName = path.replace(dirs[dirs.length - 1], "");
+            if (!Files.exists(Paths.get(pathWithoutFileName))) { //create dirs if they don't exist
+                if (!new File(pathWithoutFileName).mkdirs()) {
+                    throw new IOException("An error occurred while creating directories");
+                }
+            }
+        }
+        writeFile(path, content);
+    }
+
+    /**
+     * Write a file to disk
+     *
+     * @param filename the file name (and its extension if wanted)
+     * @param content  the content to write
+     * @throws IOException
+     */
+    private static void writeFile(final String filename, final String content) throws IOException {
+        final BufferedWriter writer = new BufferedWriter(new FileWriter(filename));
+        writer.write(content);
+        writer.flush();
+        writer.close();
+    }
+
+    /**
+     * Convert a JSON object to String
+     * toString() does not produce a valid JSON string
+     */
+    public static String jsonObjToString(JsonObject object) {
+        return JsonWriter.string(object);
+    }
+
+    /**
+     * Convert a JSON array to String
+     * toString() does not produce a valid JSON string
+     */
+    public static String jsonArrayToString(JsonArray array) {
+        return JsonWriter.string(array);
+    }
+}