Initial commit

wwwroot/core/utils/jsonManager.js

@@ -0,0 +1,84 @@
+import path from 'path';
+import {readFileSync, writeFileSync} from 'fs';
+import {Logger} from '../logging/logger.js';
+
+export default class JsonManager {
+
+    /**
+     * Read the current data in a file
+     * @param {*} filePath 
+     * @returns deserialized content
+     */
+    static read(filePath) {
+        try {
+            const fullPath = path.resolve(filePath);
+            const jsonString = readFileSync(fullPath, 'utf8');
+
+            return JSON.parse(jsonString);
+        } catch (err) {
+            Logger.error('Error reading JSON file: ', err.message);
+            return null;
+        }
+    }
+
+    /**
+     * Write the given data in a file by overriding the previous data 
+     * @param {*} filePath 
+     * @param {*} data
+     * @returns 
+     */
+    static writeUnsafe(filePath, data) {
+        try {
+            const fullPath = path.resolve(filePath);
+            
+            const jsonString = JSON.stringify(data);
+
+            writeFileSync(fullPath, jsonString, 'utf8', async err =>  {
+                if(err) await Logger.error(err.message);
+            });
+
+        } catch (err) {
+            Logger.error('Error writting in JSON file: ', err.message);
+            return null;
+        }
+    }
+
+    static upsertToken(filePath, userData) {
+        const existingData = JsonManager.read(filePath);
+
+        const index = existingData.findIndex(e => e.userId === userData.userId);
+
+        if (index !== -1) {
+            existingData.splice(index, 1, userData);
+        } else {
+            existingData.push(userData);
+        }
+
+        JsonManager.writeUnsafe(filePath, existingData);
+        return existingData;
+    }
+
+    static upsertPost(filePath, { userId, permalink }) {
+        const data = JsonManager.read(filePath);
+        let modified = false;
+
+        const index = data.findIndex(e => e.userId === userId);
+
+        if (index !== -1) {
+            if (data[index].permalink !== permalink) {
+                data[index].permalink = permalink;
+                modified = true;
+            }
+        } else {
+            data.push({ userId, permalink });
+            modified = true;
+        }
+
+        if (modified) {
+            JsonManager.writeUnsafe(filePath, data);
+        }
+
+        return modified;
+    }
+}
+