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+import { Observable, from, of } from 'rxjs';
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+import { switchMap, map, catchError, finalize } from 'rxjs/operators';
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+
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+export interface TestRxjsChatMessage {
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+ role: string;
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+ content: string;
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+}
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+
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+export class TestRxjsChatCompletion {
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+ messageList: Array<TestRxjsChatMessage>;
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+
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+ constructor(messageList: Array<TestRxjsChatMessage>) {
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+ this.messageList = messageList;
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+ }
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+
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+ createCompletionByStream(options?:{
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+ model?:string
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+ }): Observable<{ content: string, cumulativeContent: string, done: boolean }> {
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+ const token = localStorage.getItem("token");
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+ const bodyJson = {
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+ "token": `Bearer ${token}`,
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+ "messages": this.messageList,
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+ "model": options?.model || "fmode-3.6-16k",
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+ "temperature": 0.5,
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+ "presence_penalty": 0,
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+ "frequency_penalty": 0,
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+ "top_p": 1,
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+ "stream": true
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+ };
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+
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+ return from(fetch("https://test.fmode.cn/api/apig/aigc/gpt/v1/chat/completions", {
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+ "headers": {
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+ "accept": "text/event-stream",
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+ "sec-fetch-dest": "empty",
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+ "sec-fetch-mode": "cors",
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+ "sec-fetch-site": "same-site"
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+ },
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+ "referrer": "https://ai.fmode.cn/",
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+ "referrerPolicy": "strict-origin-when-cross-origin",
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+ "body": JSON.stringify(bodyJson),
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+ "method": "POST",
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+ "mode": "cors",
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+ "credentials": "omit"
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+ })).pipe(
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+ switchMap(response => {
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+ const reader = response.body?.getReader();
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+ if (!reader) {
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+ throw new Error("Failed to get the response reader.");
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+ }
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+ const decoder = new TextDecoder();
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+ let buffer = "";
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+ let messageAiReply = "";
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+ let messageIndex = this.messageList.length;
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+
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+ return new Observable<{ content: string, cumulativeContent: string, done: boolean }>(observer => {
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+ const read = () => {
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+ reader.read().then(({ done, value }) => {
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+ if (done) {
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+ observer.complete();
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+ return;
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+ }
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+
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+ buffer += decoder.decode(value);
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+ let messages = buffer.split("\n");
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+
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+ for (let i = 0; i < messages.length - 1; i++) {
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+ let message = messages[i];
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+ let dataText = message.replace("data: ", "");
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+
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+ if (dataText.startsWith("{")) {
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+ try {
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+ let dataJson = JSON.parse(dataText);
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+ let content = dataJson?.choices?.[0]?.delta?.content || "";
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+ messageAiReply += content;
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+ this.messageList[messageIndex] = {
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+ role: "assistant",
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+ content: messageAiReply
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+ };
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+ observer.next({ content, cumulativeContent: messageAiReply, done: false });
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+ } catch (err) { }
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+ }
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+
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+ if (dataText.startsWith("[")) {
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+ this.messageList[messageIndex] = {
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+ role: "assistant",
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+ content: messageAiReply
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+ };
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+ observer.next({ content: "", cumulativeContent: messageAiReply, done: true });
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+ messageAiReply = "";
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+ }
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+
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+ buffer = buffer.slice(message.length + 1);
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+ }
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+
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+ read();
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+ }).catch(err => observer.error(err));
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+ };
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+
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+ read();
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+ });
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+ }),
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+ catchError(err => {
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+ console.error(err);
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+ return of({ content: "", cumulativeContent: "", done: true });
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+ }),
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+ finalize(() => {
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+ console.log("Stream completed");
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+ })
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+ );
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+ }
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+}
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