chore: Move API source code to API folder.

api/src/backendimpl/base.ts

@@ -0,0 +1,59 @@
+export type ParameterReturnedValue = { 
+  success: boolean,
+  message?: string
+}
+
+export type ForwardRule = {
+  sourceIP: string,
+  sourcePort: number,
+  destPort: number
+};
+
+export type ConnectedClient = {
+  ip: string,
+  port: number,
+  
+  connectionDetails: ForwardRule
+};
+
+export class BackendBaseClass {
+  state: "stopped" | "stopping" | "started" | "starting";
+
+  clients?: ConnectedClient[]; // Not required to be implemented, but more consistency
+  logs: string[];
+
+  constructor(parameters: string) {
+    this.logs = [];
+    this.clients = [];
+    
+    this.state = "stopped";
+  }
+
+  addConnection(sourceIP: string, sourcePort: number, destPort: number, protocol: "tcp" | "udp"): void {};
+  removeConnection(sourceIP: string, sourcePort: number, destPort: number, protocol: "tcp" | "udp"): void {};
+
+  async start(): Promise<boolean> {
+    return true;
+  }
+
+  async stop(): Promise<boolean> {
+    return true;
+  };
+
+  getAllConnections(): ConnectedClient[] {
+    if (this.clients == null) return [];
+    return this.clients;
+  };
+
+  static checkParametersConnection(sourceIP: string, sourcePort: number, destPort: number, protocol: "tcp" | "udp"): ParameterReturnedValue {
+    return {
+      success: true
+    }
+  };
+
+  static checkParametersBackendInstance(data: string): ParameterReturnedValue {
+    return {
+      success: true
+    }
+  };
+}