name: CI - PR Comments

 # This workflow has write permissions on the repo
 # It must not checkout a PR and run untrusted code

# Also requesting write permissions on PR to be able to comment
permissions:
  pull-requests: 'write'

on:
  workflow_run:
    workflows: ["CI"]
    types:
      - completed

jobs:

  missing-examples:
    runs-on: ubuntu-latest
    if: >
      github.event.workflow_run.event == 'pull_request' &&
      github.event.workflow_run.conclusion == 'failure'
    steps:
      - name: 'Download artifact'
        id: find-artifact
        uses: actions/github-script@v6
        with:
          result-encoding: string
          script: |
            var artifacts = await github.rest.actions.listWorkflowRunArtifacts({
               owner: context.repo.owner,
               repo: context.repo.repo,
               run_id: ${{github.event.workflow_run.id }},
            });
            var matchArtifacts = artifacts.data.artifacts.filter((artifact) => {
              return artifact.name == "missing-examples"
            });
            if (matchArtifacts.length == 0) { return "false" }
            var matchArtifact = matchArtifacts[0];
            var download = await github.rest.actions.downloadArtifact({
               owner: context.repo.owner,
               repo: context.repo.repo,
               artifact_id: matchArtifact.id,
               archive_format: 'zip',
            });
            var fs = require('fs');
            fs.writeFileSync('${{github.workspace}}/missing-examples.zip', Buffer.from(download.data));
            return "true"
      - run: unzip missing-examples.zip
        if: ${{ steps.find-artifact.outputs.result == 'true' }}
      - name: 'Comment on PR'
        if: ${{ steps.find-artifact.outputs.result == 'true' }}
        uses: actions/github-script@v6
        with:
          github-token: ${{ secrets.GITHUB_TOKEN }}
          script: |
            var fs = require('fs');
            var issue_number = Number(fs.readFileSync('./NR'));
            if (fs.existsSync('./missing-metadata')) {
              await github.rest.issues.createComment({
                owner: context.repo.owner,
                repo: context.repo.repo,
                issue_number: issue_number,
                body: 'You added a new example but didn\'t add metadata for it. Please update the root Cargo.toml file.'
              });
            }
            if (fs.existsSync('./missing-update')) {
              await github.rest.issues.createComment({
                owner: context.repo.owner,
                repo: context.repo.repo,
                issue_number: issue_number,
                body: 'The generated `examples/README.md` is out of sync with the example metadata in `Cargo.toml` or the example readme template. Please run `cargo run -p build-templated-pages -- update examples` to update it, and commit the file change.'
              });
            }

  missing-features:
    runs-on: ubuntu-latest
    if: >
      github.event.workflow_run.event == 'pull_request' &&
      github.event.workflow_run.conclusion == 'failure'
    steps:
      - name: 'Download artifact'
        id: find-artifact
        uses: actions/github-script@v6
        with:
          result-encoding: string
          script: |
            var artifacts = await github.rest.actions.listWorkflowRunArtifacts({
               owner: context.repo.owner,
               repo: context.repo.repo,
               run_id: ${{github.event.workflow_run.id }},
            });
            var matchArtifacts = artifacts.data.artifacts.filter((artifact) => {
              return artifact.name == "missing-features"
            });
            if (matchArtifacts.length == 0) { return "false" }
            var matchArtifact = matchArtifacts[0];
            var download = await github.rest.actions.downloadArtifact({
               owner: context.repo.owner,
               repo: context.repo.repo,
               artifact_id: matchArtifact.id,
               archive_format: 'zip',
            });
            var fs = require('fs');
            fs.writeFileSync('${{github.workspace}}/missing-features.zip', Buffer.from(download.data));
            return "true"
      - run: unzip missing-features.zip
        if: ${{ steps.find-artifact.outputs.result == 'true' }}
      - name: 'Comment on PR'
        if: ${{ steps.find-artifact.outputs.result == 'true' }}
        uses: actions/github-script@v6
        with:
          github-token: ${{ secrets.GITHUB_TOKEN }}
          script: |
            var fs = require('fs');
            var issue_number = Number(fs.readFileSync('./NR'));
            if (fs.existsSync('./missing-features')) {
              await github.rest.issues.createComment({
                owner: context.repo.owner,
                repo: context.repo.repo,
                issue_number: issue_number,
                body: 'You added a new feature but didn\'t add a description for it. Please update the root Cargo.toml file.'
              });
            }
            if (fs.existsSync('./missing-update')) {
              await github.rest.issues.createComment({
                owner: context.repo.owner,
                repo: context.repo.repo,
                issue_number: issue_number,
                body: 'You added a new feature but didn\'t update the readme. Please run `cargo run -p build-templated-pages -- update features` to update it, and commit the file change.'
              });
            }

  msrv:
    runs-on: ubuntu-latest
    if: >
      github.event.workflow_run.event == 'pull_request' &&
      github.event.workflow_run.conclusion == 'failure'
    steps:
      - name: 'Download artifact'
        id: find-artifact
        uses: actions/github-script@v6
        with:
          result-encoding: string
          script: |
            var artifacts = await github.rest.actions.listWorkflowRunArtifacts({
               owner: context.repo.owner,
               repo: context.repo.repo,
               run_id: ${{github.event.workflow_run.id }},
            });
            var matchArtifacts = artifacts.data.artifacts.filter((artifact) => {
              return artifact.name == "msrv"
            });
            if (matchArtifacts.length == 0) { return "false" }
            var matchArtifact = matchArtifacts[0];
            var download = await github.rest.actions.downloadArtifact({
               owner: context.repo.owner,
               repo: context.repo.repo,
               artifact_id: matchArtifact.id,
               archive_format: 'zip',
            });
            var fs = require('fs');
            fs.writeFileSync('${{github.workspace}}/msrv.zip', Buffer.from(download.data));
            return "true"
      - run: unzip msrv.zip
        if: ${{ steps.find-artifact.outputs.result == 'true' }}
      - name: 'Comment on PR'
        if: ${{ steps.find-artifact.outputs.result == 'true' }}
        uses: actions/github-script@v6
        with:
          github-token: ${{ secrets.GITHUB_TOKEN }}
          script: |
            var fs = require('fs');
            var issue_number = Number(fs.readFileSync('./NR'));
            await github.rest.issues.createComment({
              owner: context.repo.owner,
              repo: context.repo.repo,
              issue_number: issue_number,
              body: 'Your PR increases Bevy Minimum Supported Rust Version. Please update the `rust-version` field in the root Cargo.toml file.'
            });