Move testing to 3001 port (#8)

Create separate database for testing
Add runtime configuration file support

src/utils/rcparser.js

@@ -0,0 +1,102 @@
+const fs = require('fs');
+const path = require('path');
+const config = require('../../config');
+const rcPath = path.resolve(__dirname, '../../', config.rcFile || './.codexdocsrc');
+
+/**
+ * @typedef {Object} RCData
+ * @property {string} title - website title
+ * @property {object[]} menu - options for website menu
+ * @property {string} menu[].title - menu option title
+ * @property {string} menu[].uri - menu option href
+ */
+
+/**
+ * @class RCParser
+ * @classdesc Class to parse runtime configuration file for CodeX Docs engine
+ */
+module.exports = class RCParser {
+  /**
+   *  Default CodeX Docs configuration
+   *
+   * @static
+   * @return {{title: string, menu: Array}}
+   */
+  static get DEFAULTS() {
+    return {
+      title: 'CodeX Docs',
+      menu: []
+    };
+  }
+
+  /**
+   * Find and parse runtime configuration file
+   *
+   * @static
+   * @return {{title: string, menu: []}}
+   */
+  static getConfiguration() {
+    if (!fs.existsSync(rcPath)) {
+      return RCParser.DEFAULTS;
+    }
+
+    const file = fs.readFileSync(rcPath, {encoding: 'UTF-8'});
+    const rConfig = {};
+    let userConfig;
+
+    try {
+      userConfig = JSON.parse(file);
+    } catch (e) {
+      console.log('CodeX Docs rc file should be in JSON format.');
+      return RCParser.DEFAULTS;
+    }
+
+    rConfig.title = userConfig.title || RCParser.DEFAULTS.title;
+    rConfig.menu = userConfig.menu || RCParser.DEFAULTS.menu;
+
+    if (!(rConfig.menu instanceof Array)) {
+      console.log('Menu section in the rc file must be an array.');
+      rConfig.menu = RCParser.DEFAULTS.menu;
+    }
+
+    rConfig.menu = rConfig.menu.filter((option, i) => {
+      i = i + 1;
+      if (typeof option === 'string') {
+        return true;
+      }
+
+      if (!option || option instanceof Array || typeof option !== 'object') {
+        console.log(`Menu option #${i} in rc file must be a string or an object`);
+        return false;
+      }
+
+      const {title, uri} = option;
+
+      if (!title || typeof title !== 'string') {
+        console.log(`Menu option #${i} title must be a string.`);
+        return false;
+      }
+
+      if (!uri || typeof uri !== 'string') {
+        console.log(`Menu option #${i} uri must be a string.`);
+        return false;
+      }
+
+      return true;
+    });
+
+    rConfig.menu = rConfig.menu.map(option => {
+      if (typeof option === 'string') {
+        return {
+          title: option,
+          /* Replace all non alpha- and numeric-symbols with '-' */
+          uri: '/' + option.toLowerCase().replace(/[ -/:-@[-`{-~]+/, '-')
+        };
+      }
+
+      return option;
+    });
+
+    return rConfig;
+  }
+};