[Feature] Create GitHub Issues from Rocket.Chat channels

[samad-yar-khan]

Issue(s)

closes #10

Acceptance Criteria fulfillment

• [x] Add slash command to open a new issues modal with input fields required to create an issue
• [x] Send Authenticated request to GitHub API to create a new issue
• [x] Handle edge cases with non authenticated developers
• [x] Repository owners can Add Assignees and Labels to the issue.

Proposed changes (including videos or screenshots)

• Users can type /github new-issue to display a modal which takes input needed to create a new issue.
• Notify users about created issue.
• Repository owners can add assignees and labels to the issue.
• Assignees and labels drop for users who dont have edit access to the repository.

https://user-images.githubusercontent.com/70485812/179430347-0d3af688-ecbc-4aa9-8ed9-5d1c821f123a.mp4

[samad-yar-khan]

@RonLek @Sing-Li I have added the feature to fetch issue templates . I have also updated the slash command /github new-issue to github issue as it seemed it more intuitive, let me know if we should change back to the original slash command.

• I have added two new methods to the GitHubSDK :
  • getIssueTemplates() : This method uses the GitHub Content API to fetch the files from .github/ISSUE_TEMPLATES directory location. If the location does not exits, we set template_not_found property of the response to true ,indicating that no issue templates exist.
  • getIssueTemplateCode() : This methods takes download_url of a fille on GitHub and returns the code on that file.
• Whenever the user enters /github issue command, newIssueStarterModal will be triggered, and user will be prompted to enter repository name.
• When user clicks on Next, we call getIssueTemplates() method. If templates exist, we trigger issueTemplateSelectionModal to display all the issue templates available.
• When the user clicks on Select we use the getIssueTemplateCode() fetches the code for the selected template and triggers newIssueModal with the template code.
• if issue templates do not exist on a repository, newIssueModal will be triggered with a blank template.

I have tested this with repositories which have issue templates and those without issue templates and have tried to handle all the edge cases. This was the only work-around I could think of, since there are no Template API as of now.

https://user-images.githubusercontent.com/70485812/180505080-a1a30516-4a79-4520-a774-3fa3ed8082d0.mp4

[RonLek]

Changes LGTM. Merging this in.