Refactor the Server project

[Lensual]

1. [refactor] Reorganize the server project structure
2. [feat] Add graceful exit
3. [fix] fixed return the shadowing err variable
4. [feat] read manifest.json to memory only, no change origin file
5. [feat] add ManifestProvider & TtsProvider, enhance for support different TTS providers based on language selected #72
6. [fix] kill -9 is not recommend, syscall.Kill SIGTERM instead of.

[Lensual]

manifest.json 这块不是很了解，我觉得 #72 根据不同的语言来使用不同的 manifest.json 可能有一些破坏性修改。

我通过Provider的形式来选择对应的 Vendor 并 Hook manifest.json的处理过程

[Lensual]

看到一处代码，不确定这个是不是bug

https://github.com/Lensual/ASTRA.ai/blob/server/server/internal/service/service.go#L266

>>> //TODO check is correct? not req.AgoraAsrLanguage?
>>> language := gjson.Get(manifestJson, `predefined_graphs.0.nodes.#(name=="agora_rtc").property.agora_asr_language`).String()
	manifestJson, err = tts.ProcessManifest(manifestJson, common.Language(language), req.VoiceType)
	if err != nil {
		slog.Error("handlerStart tts ProcessManifest failed", "err", err, "requestId", req.RequestId, logTag)
		return "", "", err
	}
...

[sunshinexcode]

看到一处代码，不确定这个是不是bug

https://github.com/Lensual/ASTRA.ai/blob/server/server/internal/service/service.go#L266

>>> //TODO check is correct? not req.AgoraAsrLanguage?
>>> language := gjson.Get(manifestJson, `predefined_graphs.0.nodes.#(name=="agora_rtc").property.agora_asr_language`).String()
	manifestJson, err = tts.ProcessManifest(manifestJson, common.Language(language), req.VoiceType)
	if err != nil {
		slog.Error("handlerStart tts ProcessManifest failed", "err", err, "requestId", req.RequestId, logTag)
		return "", "", err
	}
...

@Lensual
在 256 行会进行设置
if req.AgoraAsrLanguage != "" {
manifestJson, _ = sjson.Set(manifestJson, predefined_graphs.0.nodes.#(name=="agora_rtc").property.agora_asr_language, req.AgoraAsrLanguage)
}

这里再进行获取
language := gjson.Get(manifestJson, predefined_graphs.0.nodes.#(name=="agora_rtc").property.agora_asr_language).String()

逻辑上没问题

[sunshinexcode]

manifest.json 这块不是很了解，我觉得 #72 根据不同的语言来使用不同的 manifest.json 可能有一些破坏性修改。

我通过Provider的形式来选择对应的 Vendor 并 Hook manifest.json的处理过程

@Lensual
使用 azure TTS 和 Elevenlabs TTS 采用的 manifest.json 编排不一样, 使用了 manifest.json.example 和 manifest.json.elevenlabs.example, 根据环境变量 TTS_VENDOR_CHINESE / TTS_VENDOR_ENGLISH 来决定采用哪个.

[cyfyifanchen]

Keep it going, I like to see this kinds of talk.

[Lensual]

也许前端提供一个 manifest.json 选项会更好一些，并且提供在线编辑的接口

[sunshinexcode]

也许前端提供一个 manifest.json 选项会更好一些，并且提供在线编辑的接口

@Lensual
前端目前是轻逻辑, manifest.json 目前是需要预先编排好, 需要对 RTE 整体架构有一定了解, 这块目前暂时都放在后端来处理.
不久会提供manifest.json的可视化编排工具, 就会便捷很多, 到时候会再考虑优化

[Lensual]

这个提交是不是过大了，需要拆分吗

[cyfyifanchen]

@Lensual Right, we updated a few things. Merge the latest changes into your branch and see if you can split the code into smaller chunks for a better review.

[Lensual]

I was wrong, 3. [fix] fixed return the shadowing err variable is not a bug.

:P

[cyfyifanchen]

This PR needs to be updated.