From 2e26f472eab3a3d235f3e625e4d82716f0e4dd9a Mon Sep 17 00:00:00 2001
From: Jiiks <jiiks@windowslive.com>
Date: Tue, 16 Jan 2018 03:49:26 +0200
Subject: [PATCH] FileUtils

---
 client/src/modules/index.js |  2 +-
 client/src/modules/utils.js | 88 ++++++++++++++++++++++++++++++++++++-
 2 files changed, 88 insertions(+), 2 deletions(-)

diff --git a/client/src/modules/index.js b/client/src/modules/index.js
index 0240d6cf..783f9629 100644
--- a/client/src/modules/index.js
+++ b/client/src/modules/index.js
@@ -1,4 +1,4 @@
-export { Logger, Utils } from './utils';
+export { Logger, Utils, FileUtils } from './utils';
 export { PluginManager } from './pluginmanager';
 export { Pluging } from './plugin';
 export { BDIpc } from './bdipc';
diff --git a/client/src/modules/utils.js b/client/src/modules/utils.js
index 1d969556..5238edac 100644
--- a/client/src/modules/utils.js
+++ b/client/src/modules/utils.js
@@ -48,7 +48,93 @@ class Utils {
             cb(...args);
         }
     }
+
+    static async tryParseJson(jsonString) {
+        try {
+            return JSON.parse(jsonString);
+        } catch (err) {
+            throw ({
+                'message': 'Failed to parse json',
+                err
+            });
+        }
+    }
     
 }
 
-module.exports = { Logger, Utils }
\ No newline at end of file
+class FileUtils {
+
+    static async fileExists(path) {
+        return new Promise((resolve, reject) => {
+            fs.stat(path, (err, stats) => {
+                if (err) return reject({
+                    'message': `No such file or directory: ${err.path}`,
+                    err
+                });
+
+                if (!stats.isFile()) return reject({
+                    'message': `Not a file: ${path}`,
+                    stats
+                });
+
+                resolve();
+            });
+        });
+    }
+
+    static async directoryExists(path) {
+        return new Promise(resolve => {
+            fs.stat(path, (err, stats) => {
+                if (err) return reject({
+                    'message': `Directory does not exist: ${path}`,
+                    err
+                });
+
+                if (!stats.isDirectory()) return reject({
+                    'message': `Not a directory: ${path}`,
+                    stats
+                });
+
+                resolve();
+            });
+        });
+    }
+
+    static async readFile(path) {
+        try {
+            await this.fileExists(path);
+        } catch (err) {
+            throw (err);
+        }
+
+        return new Promise(resolve => {
+            fs.readFile(path, 'utf-8', (err, data) => {
+                if (err) reject({
+                    'message': `Could not read file: ${path}`,
+                    err
+                });
+
+                resolve(data);
+            });
+        });
+    }
+
+    static async readJsonFromFile(path) {
+        let readFile;
+        try {
+            readFile = await this.readFile(path);
+        } catch (err) {
+            throw (err);
+        }
+
+        try {
+            const parsed = await Utils.tryParseJson(readFile);
+            return parsed;
+        } catch (err) {
+            throw (Object.assign(err, { path }));
+        }
+    }
+}
+
+
+module.exports = { Logger, Utils, FileUtils }
\ No newline at end of file