Handlers Directory and Universal Import Fix (#86)

* Update: split jsonHandler.ts to different files

* Add: handlers folder and moved some files there

* Update: interface file name

src/utils/handlers/configHandler.ts

@@ -0,0 +1,87 @@
+import { Configuration, ServerConfig, UserConfig, isServerConfigurationKey } from '../index.js'
+import fs from 'fs'
+
+/**
+ * Method to open a file in the working directory and modify/create it
+ * 
+ * @param filename name of the file
+ * @param key key value to access
+ * @param value new value to assign
+ */
+// add type of change (server, user)
+export function openConfig(filename: string, key: string, value: any) {
+    const fullFileName = `data/${filename}`
+    
+    // check if the file exists, if not then make the config file
+    if (fs.existsSync(fullFileName)) {
+        fs.readFile(fullFileName, 'utf8', (error, data) => {
+            if (error)
+                console.log(`[Error: openConfig] Incorrect file format`)
+            else {
+                const object = JSON.parse(data)
+                object['options'][key] = value
+                fs.writeFileSync(fullFileName, JSON.stringify(object, null, 2))
+            }
+        })
+    } else { // work on dynamic file creation
+        let object: Configuration
+        if (isServerConfigurationKey(key))
+            object = JSON.parse('{ \"name\": \"Server Confirgurations\" }')
+        else
+            object = JSON.parse('{ \"name\": \"User Confirgurations\" }')
+
+        // set standard information for config file and options
+        object['options'] = {
+            [key]: value
+        }
+
+        fs.writeFileSync(`data/${filename}`, JSON.stringify(object, null, 2))
+        console.log(`[Util: openConfig] Created '${filename}' in working directory`)
+    }
+}
+
+/**
+ * Method to obtain the configurations of the message chat/thread
+ * 
+ * @param filename name of the configuration file to get
+ * @param callback function to allow a promise from getting the config
+ */
+export async function getServerConfig(filename: string, callback: (config: ServerConfig | undefined) => void): Promise<void> {
+    const fullFileName = `data/${filename}`
+
+    // attempt to read the file and get the configuration
+    if (fs.existsSync(fullFileName)) {
+        fs.readFile(fullFileName, 'utf8', (error, data) => {
+            if (error) {
+                callback(undefined) 
+                return // something went wrong... stop
+            }
+            callback(JSON.parse(data))
+        })
+    } else {
+        callback(undefined) // file not found
+    }
+}
+
+/**
+ * Method to obtain the configurations of the message chat/thread
+ * 
+ * @param filename name of the configuration file to get
+ * @param callback function to allow a promise from getting the config
+ */
+export async function getUserConfig(filename: string, callback: (config: UserConfig | undefined) => void): Promise<void> {
+    const fullFileName = `data/${filename}`
+
+    // attempt to read the file and get the configuration
+    if (fs.existsSync(fullFileName)) {
+        fs.readFile(fullFileName, 'utf8', (error, data) => {
+            if (error) {
+                callback(undefined) 
+                return // something went wrong... stop
+            }
+            callback(JSON.parse(data))
+        })
+    } else {
+        callback(undefined) // file not found
+    }
+}