Add MQTT Support

[mmjsmohit]

PR Description

This PR adds support for MQTT v3 (3.1 and 3.1.1) Client Testing using the mqtt_client package.

1. The foundation of our MQTT service has been expanded with the addition of new models.
2. A working version of our MQTT service has been successfully implemented.
3. I've added support for MQTT topic subscriptions, allowing users to subscribe to multiple topics at once.
4. Some level of error handling has been taken care of. I plan to make a separate PR for writing and fixing tests and implementing comprehensive level of error handling.

Related Issues

• Related Issue Add Support for MQTT #115

Checklist

• I have gone through the contributing guide
• I have run the tests (flutter test) and all tests are passing.

Some tests are failing, I plan to make a separate PR for fixing and writing more tests.

Added/updated tests?

We encourage you to add relevant test cases.

• Yes
• No, and this is why: I plan to make a separate PR for adding tests.

[mmjsmohit]

@ashitaprasad @animator Would love to receive your inputs on the current implementation!

Go API Dash! 🫶🏻

[khanjasir90]

@mmjsmohit can we use json_serializable for to and from json code generation and equatable for ==.
@ashitaprasad what's your take on this.

[mmjsmohit]

@mmjsmohit can we use json_serializable for to and from json code generation and equatable for ==. @ashitaprasad what's your take on this.

Sure! That's a good suggestion @khanjasir90 considering the model classes are fairly complex. Currently, I am busy with my mid-terms. Will add that soon.

[animator]

@mmjsmohit Please make this change #307

[mmjsmohit]

Required changes made!

protocol.dropdown.mp4

[ashitaprasad]

@mmjsmohit Can you resolve the conflicts for this PR.
Some feedback on the existing implementation :
State management of the values being entered is not correct. When the user switches screens, the values disappear.

mohit.feedback.mov

And change the color of the switch from purple. Keep it in accordance with the theme of API Dash

[mmjsmohit]

Hi @ashitaprasad,

I’ve resolved the conflicts in the PR and also migrated to DataTable2 from DaviTable. Additionally, I’ve made several UI fixes. You can find more details in the video and screenshots below:

Light Mode:

Dark Mode:

Video:

Screencast.from.2024-04-05.16-15-58.webm

[ashitaprasad]

@mmjsmohit There is an issue in the implementation. Every time, I create a new MQTT request, automatically the response and request fields of the previous MQTT request gets filled. This should not happen.

[mmjsmohit]

I am currently enhancing the handling of MQTT requests to ensure robustness. Should I create a new model specifically for MQTT, or would it be better to modify the existing request model?

[ashitaprasad]

@mmjsmohit It should be a new model.

[ashitaprasad]

Closing this PR as request model has now been updated.