add history of previous connections, remodel storageModel to use backslash as path separator

src/Model/connectionModel.ts

@@ -1,13 +1,14 @@
 // this file is responsible for managing UDN connections.
 
+import StorageModel, { storageKeys } from "./storageModel";
 import UDNFrontend, { Message } from "udn-frontend";
 
 import { ChatMessage } from "./chatModel";
 import { stringify } from "./Utility/utility";
 
 export default class ConnectionModel {
-  // basic
   udn: UDNFrontend;
+  storageModel: StorageModel;
 
   // data
   get isConnected(): boolean {
@@ -29,6 +30,11 @@ export default class ConnectionModel {
 
   handleConnectionChange = (): void => {
     console.log("connection status:", this.isConnected, this.address);
+    if (this.isConnected == false) return;
+
+    if (this.address) {
+      this.storeAddress(this.address);
+    }
   };
 
   // messaging
@@ -37,28 +43,52 @@ export default class ConnectionModel {
     return this.udn.sendMessage(chatMessage.channel, stringifiedBody);
   };
 
+  // storage
+  private getAddressPath = (address: string): string[] => {
+    const dirPath = storageKeys.previousAddresses;
+    return [...dirPath, address];
+  };
+
+  storeAddress = (address: string): void => {
+    const addressPath = this.getAddressPath(address);
+    this.storageModel.store(addressPath, "");
+  };
+
+  removeAddress = (address: string): void => {
+    const addressPath = this.getAddressPath(address);
+    this.storageModel.remove(addressPath);
+  };
+
+  getAddresses = (): string[] => {
+    const dirPath = storageKeys.previousAddresses;
+    return this.storageModel.list(dirPath);
+  };
+
   // setup
   constructor(configuration: ConnectionModelConfiguration) {
     // create frontend
     this.udn = new UDNFrontend();
+    this.storageModel = configuration.storageModel;
 
     // setup handlers
     this.udn.onmessage = (data: Message) => {
-        configuration.messageHandler(data);
+      configuration.messageHandler(data);
     };
     this.udn.onconnect = () => {
-        this.handleConnectionChange();
-        configuration.connectionChangeHandler();
+      this.handleConnectionChange();
+      configuration.connectionChangeHandler();
     };
     this.udn.ondisconnect = () => {
-        this.handleConnectionChange();
-        configuration.connectionChangeHandler();
+      this.handleConnectionChange();
+      configuration.connectionChangeHandler();
     };
   }
 }
 
 // types
 export interface ConnectionModelConfiguration {
+  storageModel: StorageModel;
+
   connectionChangeHandler: () => void;
   messageHandler: (data: Message) => void;
 }