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import { Component, ElementRef, OnInit, Renderer2, ViewChild, OnDestroy } from '@angular/core';
import { NzMessageService } from 'ng-zorro-antd';
import { SSE } from "sse.js";
import { ActivatedRoute } from '@angular/router';
import { MaasApi } from '@src/app/api/maas.api';
import { TranslateService } from '@ngx-translate/core';
import { MaasService } from '../maas-service.service';
export type StatusEnum = 'typing' | 'finished';
export type Chat = { question: string, answer: string, questionId: string, status: StatusEnum };
@Component({
selector: 'app-use-application',
templateUrl: './use-application.component.html',
styleUrls: ['./use-application.component.less']
})
export class UseApplicationComponent implements OnInit, OnDestroy {
question: string;
communicationMessage: string;
chatHistory: Chat[] = [];
apiUrl = '/api/usecaseui-llm-adaptation/v1/application/chat';
queryParams: { id?: string; name?: string } = {};
selectedName: string | null = null;
options: Array<{ nzValue: string, nzLabel: string }> = [];
send = this.translate.instant('maas.send');
private currentSSE: SSE | null = null;
isGeneratingAnswer: boolean = false;
stopGenerating = this.translate.instant('maas.stopGenerating');
questionId = '';
@ViewChild('questionInput') questionInput: ElementRef;
private keydownListener: () => void;
perHight = 21;
constructor(
private message: NzMessageService,
private route: ActivatedRoute,
private myhttp: MaasApi,
private translate: TranslateService,
private maasService: MaasService,
private renderer: Renderer2
) { }
async ngOnInit() {
await this.fetchAllApplication();
this.route.queryParams.subscribe(params => {
this.queryParams = params;
this.selectedName = this.queryParams.id || this.selectedName;
});
this.keydownListener = this.renderer.listen(this.questionInput.nativeElement, 'keydown', this.handleKeyDown.bind(this));
}
ngOnDestroy() {
if (this.keydownListener) {
this.keydownListener();
}
}
close() {
if (this.currentSSE) {
this.currentSSE.close();
}
}
doAction() {
if (this.isGeneratingAnswer) {
this.close();
this.chatHistory.forEach(item => {item.status = 'finished'});
this.isGeneratingAnswer = false;
} else {
this.submitQuestion();
}
}
submitQuestion() {
if (!this.question) {
return;
}
this.isGeneratingAnswer = true;
const chatParam = {
applicationId: this.selectedName,
question: this.question,
questionId: this.maasService.generateUniqueId()
};
this.currentSSE = new SSE(this.apiUrl, { headers: { 'Content-Type': 'application/json' }, payload: JSON.stringify(chatParam), method: 'POST' });
const questionId = chatParam.questionId;
this.chatHistory.push({ question: chatParam.question, questionId: chatParam.questionId, answer: '', status: 'typing' });
this.currentSSE.addEventListener('message', (event) => {
const chat = this.chatHistory.find(chatItem => chatItem.questionId === questionId);
if (chat) {
if (['[DONE]', 'Network Error'].includes(event.data)) {
chat.status = 'finished';
this.isGeneratingAnswer = false;
if (event.data === 'Network Error') {
this.updateAnswer(event, chat);
}
this.close();
} else {
this.updateAnswer(event, chat);
}
}
});
this.currentSSE.addEventListener('error', () => {
this.currentSSE = null;
this.isGeneratingAnswer = false;
});
this.currentSSE.addEventListener('close', () => {
this.currentSSE = null;
this.isGeneratingAnswer = false;
});
this.question = '';
}
updateAnswer(event: any, chat: Chat): void {
chat.answer += event.data.replace(/__SPACE__/g, ' ');
}
async fetchAllApplication(): Promise<void> {
try {
const data = await this.myhttp.getAllApplication().toPromise();
this.options = data.result_body.map(item => ({
nzValue: item.applicationId,
nzLabel: item.applicationName
}));
this.selectedName = this.options.length > 0 ? this.options[0].nzValue : '';
} catch {
this.message.error('Failed to obtain intent data');
}
}
async copy(content: string): Promise<void> {
try {
await (navigator as any).clipboard.writeText(content);
this.message.success(this.translate.instant('maas.copy_to_clipboard'));
} catch (err) {
console.error(this.translate.instant('maas.copy_failed') + ': ', err);
}
}
deleteQuestion(questionId: string): void {
this.chatHistory = this.chatHistory.filter(item => item.questionId !== questionId);
}
handleKeyDown(event: KeyboardEvent) {
if (event.key === 'Enter') {
if (event.shiftKey || event.ctrlKey || event.altKey) {
const TextareaDom = this.questionInput.nativeElement;
const height = parseInt(TextareaDom.style.height.split('px')[0], 10) + this.perHight;
TextareaDom.style.height = `${height}px`;
if(event.ctrlKey || event.altKey) {
const index = TextareaDom.selectionStart;
const val = TextareaDom.value;
TextareaDom.value = `${val.slice(0, index)}\n${val.slice(index)}`;
TextareaDom.selectionStart = index + 1;
TextareaDom.selectionEnd = index + 1;
}
} else {
event.preventDefault();
if (this.isGeneratingAnswer) {
this.message.warning(this.translate.instant('maas.is_chatting'));
} else {
this.doAction();
}
}
}
}
}
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