Add first plugin version

Author: awaluk

.gitignore

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+.idea/

api-favorites.php

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+<?php
+/**
+ * Q2A API - plugin to Question2Answer
+ * @author Arkadiusz Waluk <arkadiusz@waluk.pl>
+ */
+
+class api_favorites
+{
+    public function match_request($request)
+    {
+        return $request === API_URL.'favorites';
+    }
+
+    public function process_request()
+    {
+        $user_id = qa_get_logged_in_userid();
+        if (empty($user_id)) {
+            return_json_response(['error' => 'User not logged']);
+        }
+
+        $db_questions = qa_db_select_with_pending(qa_db_user_favorite_qs_selectspec($user_id));
+        $questions = array_column($db_questions, 'postid');
+
+        $db_users = qa_db_select_with_pending(qa_db_user_favorite_users_selectspec($user_id));
+        $users = array_column($db_users, 'handle');
+
+        $db_tags = qa_db_select_with_pending(qa_db_user_favorite_tags_selectspec($user_id));
+        $tags = array_column($db_tags, 'word');
+
+        $db_categories = qa_db_select_with_pending(qa_db_user_favorite_categories_selectspec($user_id));
+        $categories = array_column($db_categories, 'title');
+
+        return_json_response([
+            'questions' => $questions,
+            'users' => $users,
+            'tags' => $tags,
+            'categories' => $categories,
+        ]);
+    }
+}

api-functions.php

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+<?php
+/**
+* Q2A API - plugin to Question2Answer
+* @author Arkadiusz Waluk <arkadiusz@waluk.pl>
+*/
+
+define('API_URL', 'api/');
+
+function return_json_response($data, $code = 200)
+{
+    header('Content-Type: application/json');
+    http_response_code($code);
+
+    echo json_encode($data);
+    exit();
+}

metadata.json

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+{
+    "name": "Q2A API",
+    "uri": "",
+    "description": "Simple API serving data from Q2A in JSON",
+    "version": "1.0",
+    "date": "2017-09-01",
+    "author": "Arkadiusz Waluk",
+    "author_uri": "http://waluk.pl",
+    "license": "MIT",
+    "min_q2a": "1.5",
+    "update_uri": ""
+}

qa-plugin.php

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+<?php
+/**
+ * Q2A API - plugin to Question2Answer
+ * @author Arkadiusz Waluk <arkadiusz@waluk.pl>
+ */
+
+/*
+	Plugin Name: Q2A API
+	Plugin URI:
+	Plugin Description: Simple API serving data from Q2A in JSON
+	Plugin Version: 1.0
+	Plugin Date: 2017-09-01
+	Plugin Author: Arkadiusz Waluk
+	Plugin Author URI: https://waluk.pl
+	Plugin License: MIT
+	Plugin Minimum Question2Answer Version: 1.5
+	Plugin Update Check URI:
+*/
+
+if (!defined('QA_VERSION')) {
+	header('Location: ../../');
+	exit;
+}
+
+qa_register_plugin_module('page', 'api-favorites.php', 'api_favorites', 'API user favorites');
+
+require_once 'api-functions.php';