feat: initialize helper client

client/index.js

@@ -0,0 +1,78 @@
+import { createConnection } from 'node:net';
+import { serialize, deserialize } from 'bson';
+import EventEmitter from 'node:events';
+
+class HelperClient extends EventEmitter {
+    constructor({ server }) {
+        super();
+        if (!server.port) throw new Error('You did not specify the server port.');
+        this.server = server;
+    };
+
+    connect() {
+        this.client = createConnection(this.server.port, this.server.host ? this.server.host : 'localhost', () => {
+            this.emit('connect');
+        });
+
+        this.client.on('data', (data) => {
+            const eventData = deserialize(data);
+
+            switch (eventData.op) {
+                case 2: {
+                    // The 'aiResponse' event.
+
+                    this.emit('aiResponse', eventData);
+                };
+
+                case 6: {
+                    // The 'ocrResponse' event.
+
+                    this.emit('ocrResponse', eventData);
+                };
+            };
+        });
+    };
+
+    sendData(data) {
+        this.client.write(serialize(data));
+        return;
+    };
+
+    scanText(text, id) {
+        this.sendData({
+            op: 1,
+            id, 
+            text
+        });
+
+        return;
+    };
+
+    scanImage(url, id) {
+        this.sendData({
+            op: 5,
+            id, 
+            url
+        });
+
+        return;
+    };
+
+    sendTrainData(text, label) {
+        this.sendData({
+            op: 5,
+            label, 
+            text
+        });
+
+        return;
+    };
+
+    trainAI() {
+        this.sendData({ op: 4 });
+
+        return;
+    };
+};
+
+export default HelperClient;