first draft of questions API in http #1091

jreidinger · 2024-03-13T15:53:09Z

Problem

Questions are not exposed in new architecture 2024

Solution

Add path to enlist questions and also announce when question is answered or new appear on websocket.

Testing

Tested manually

imobachgs

It is looking good, although I know that quite some work still remains. I just added a comment about how to implement the stream.

About answering a question, we could implement a D-Bus signal that it is more convenient than having to listen for properties changes. Is it worth it?

rust/agama-server/src/questions.rs

rust/agama-server/src/questions/web.rs

imobachgs · 2024-03-13T16:34:55Z

rust/agama-server/src/questions/web.rs

+use serde::{Deserialize, Serialize};
+use serde_json::json;
+
+// TODO: move to lib


only tricky part with moving to lib is that structs for web does not live there...There are GenericQuestion struct, so after move I will need to implement some Into

I still think that the Client should be 1) agnostic from the web layer and 2) live in agama-lib. However, given that we are short on time, we could add a Trello card listing things to improve and refactor. After all, we are still learning how to organize our code.

imobachgs · 2024-03-13T16:41:34Z

rust/agama-server/src/questions/web.rs

+    let add_stream = proxy
+        .receive_interfaces_added()
+        .await?
+        .then(|_| async move {


I do not know what your plan is here, but to simplify things a bit, you could include the question number (taken from the D-Bus path) and let the client (on the JavaScript side) retrieve the question.

well, current API does not allow to retrieve single question. That is different to DBus.
Basically my idea about API is:

list all unanswered questions at /questions

answer specific question according to its id with /questions/:id/answer

get event that list of unanswered questions changed

and now when I am thinking about it, we need also way to provide answers file, so some API for it.

Reason why I design it this way is that common workflow is question arise, answer is provided and then another question arise. I think that having multiple unanswered question is quite rare situation, so I optimize API for that single case, but do not prevent in future to extend it e.g. to also get single question if there will be many questions.

OK, I get the idea. About the answers file, we are not using it right now, so you can skip that part.

jreidinger · 2024-03-13T21:36:26Z

It is looking good, although I know that quite some work still remains. I just added a comment about how to implement the stream.

About answering a question, we could implement a D-Bus signal that it is more convenient than having to listen for properties changes. Is it worth it?

Well, as said, issue is that it is not about properties, but about object manager...which makes sense for dbus, but working with it in signals is not so easy...especially when it talks about interfaces, so we had that known race condition when you have question with multiple interfaces. So maybe having specific signal on Questions interface that will just say questions changed or two specialized like NewQuestion and QuestionAnswered can help and maybe makes sense even for http API?

imobachgs · 2024-03-14T06:43:31Z

It is looking good, although I know that quite some work still remains. I just added a comment about how to implement the stream.
About answering a question, we could implement a D-Bus signal that it is more convenient than having to listen for properties changes. Is it worth it?

Well, as said, issue is that it is not about properties, but about object manager...which makes sense for dbus, but working with it in signals is not so easy...especially when it talks about interfaces, so we had that known race condition when you have question with multiple interfaces. So maybe having specific signal on Questions interface that will just say questions changed or two specialized like NewQuestion and QuestionAnswered can help and maybe makes sense even for http API?

If adding those signals could help, I am all for it.

…s_http_api

imobachgs · 2024-03-20T07:11:10Z

rust/agama-server/src/questions/web.rs

+
+/// Facade of agama_lib::questions::GenericQuestion
+/// For fields details see it.
+#[derive(Clone, Serialize, Deserialize, utoipa::ToSchema)]


Why do you need a facade? If it is because of the utoipa::ToSchema, it is fine with me. I have derived the utoipa::ToSchema for some structs in lib and it feels wrong to me.

However, having to use a facade just because of our documentation library feels wrong too.

No, it is not related to utoipa at all. It is because I do not want to break dbus code and I like more the approach with generic question and composition of question parts. Original code contain QuestionWithPassword that contain link to GenericQuestion, which I do not like much.

Well, as soon as you do not break the D-Bus external API, you can refactor the internals if you wish. If you decide to keep the facade, please, write down the reason in the comment.

well, I will write it to comment. In DBus we have attributes and in question is included also answer attribute. Which is not what I want to http API. I have there two parts: 1. question and 2. answer. So original one struct is split into two and the first one is used as output and the second as expected input. At least that is my idea. As said I will write it to comment

…s_http_api

coveralls · 2024-03-21T21:11:54Z

coverage: 73.596% (-0.4%) from 73.968%
when pulling 3646c0b on questions_http_api
into 0cc18ac on architecture_2024.

imobachgs · 2024-03-22T10:55:14Z

rust/agama-server/src/questions/web.rs

+use std::{collections::HashMap, pin::Pin};
+use thiserror::Error;
+use tokio_stream::{Stream, StreamExt};
+use zbus::zvariant::ObjectPath;


You can merge this line and the next.

imobachgs · 2024-03-22T10:57:35Z

rust/agama-server/src/questions/web.rs

+use serde::{Deserialize, Serialize};
+use serde_json::json;
+
+// TODO: move to lib


I still think that the Client should be 1) agnostic from the web layer and 2) live in agama-lib. However, given that we are short on time, we could add a Trello card listing things to improve and refactor. After all, we are still learning how to organize our code.

imobachgs · 2024-03-22T11:02:00Z

rust/agama-server/src/questions/web.rs

+    }
+}
+
+#[derive(Error, Debug)]


This error do not bring any value. As we already did in the software layer, you can directly use crate::error::Error.

imobachgs · 2024-03-22T11:02:17Z

rust/agama-server/src/questions/web.rs

+
+/// Facade of agama_lib::questions::GenericQuestion
+/// For fields details see it.
+#[derive(Clone, Serialize, Deserialize, utoipa::ToSchema)]


Well, as soon as you do not break the D-Bus external API, you can refactor the internals if you wish. If you decide to keep the facade, please, write down the reason in the comment.

imobachgs · 2024-03-22T11:02:29Z

rust/agama-server/src/questions/web.rs

+
+/// Facade of agama_lib::questions::WithPassword
+/// For fields details see it.
+#[derive(Clone, Serialize, Deserialize, utoipa::ToSchema)]


Same than above.

imobachgs · 2024-03-22T11:04:25Z

rust/agama-server/src/questions/web.rs

+    );
+    let proxy = ObjectManagerProxy::builder(&dbus)
+        .path(question_path)
+        .context("Failed to create object manager path")?


To be honest, I am still not a big fan of using anyhow in libraries. But I can leave with that :-)

me neither, but it is much faster then adding each zvariant error :)

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first draft of questions API in http

cf8ce2e

imobachgs reviewed Mar 13, 2024

View reviewed changes

jreidinger added 3 commits March 15, 2024 09:53

add proxies for question interfaces

76caa2f

initial implementation of real service without attachment

9de4004

Merge remote-tracking branch 'origin/architecture_2024' into question…

bc5d034

…s_http_api

jreidinger changed the base branch from master to architecture_2024 March 19, 2024 20:33

imobachgs reviewed Mar 20, 2024

View reviewed changes

jreidinger added 6 commits March 21, 2024 07:37

fix routing of questions

eebbbd4

apply formatter and fix creating object proxy

22a936c

add also proper destination for object manager

281e053

another fix for destination

ba5a4dd

provide openapi documentation

da4a343

Merge remote-tracking branch 'origin/architecture_2024' into question…

46abecb

…s_http_api

jreidinger marked this pull request as ready for review March 21, 2024 21:24

apply clippy suggestions

189f24e

imobachgs approved these changes Mar 22, 2024

View reviewed changes

apply suggestions

bccf78c

imobachgs approved these changes Mar 22, 2024

View reviewed changes

fix formatting

3646c0b

jreidinger merged commit f02dc7d into architecture_2024 Mar 22, 2024
2 checks passed

jreidinger deleted the questions_http_api branch March 22, 2024 16:00

imobachgs mentioned this pull request May 3, 2024

Merge architecture_2024 branch into master #1177

Merged

imobachgs mentioned this pull request May 17, 2024

Update to release 8 #1232

Merged

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first draft of questions API in http #1091

first draft of questions API in http #1091

jreidinger commented Mar 13, 2024 •

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jreidinger Mar 22, 2024

first draft of questions API in http #1091

first draft of questions API in http #1091

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jreidinger commented Mar 13, 2024 • edited Loading

Problem

Solution

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jreidinger commented Mar 13, 2024

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jreidinger commented Mar 13, 2024 •

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coveralls commented Mar 21, 2024 •

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