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‎.github/dependabot.yml‎

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version: 2
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updates:
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# Maintain dependencies for GitHub Actions
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- package-ecosystem: "github-actions"
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directory: "/"
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schedule:
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interval: "weekly"
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groups:
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actions-deps:
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patterns:
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- "*"
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# Maintain dependencies for Maven
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- package-ecosystem: "maven"
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directory: "/"
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schedule:
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interval: "weekly"
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groups:
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maven-deps:
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patterns:
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- "*"

‎.github/workflows/classroom.yml‎

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name: Autograding Tests
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on:
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push:
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branches:
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- main
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pull_request:
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branches:
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- main
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repository_dispatch:
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concurrency:
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group: autograding-${{ github.ref }}
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cancel-in-progress: true
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permissions:
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checks: write
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actions: read
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contents: read
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pull-requests: write
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jobs:
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run-autograding-tests:
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name: AI-Powered Feedback and Autograding
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runs-on: ubuntu-latest
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env:
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OPENROUTER_MODEL: ${{ vars.OPENROUTER_MODEL }}
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SYSTEM_PROMPT: ${{ vars.SYSTEM_PROMPT }}
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steps:
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- name: Checkout repository
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uses: actions/checkout@v5
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with:
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fetch-depth: 0
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- name: Read assignment instructions
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id: instructions
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if: ${{ vars.ENABLE_AI_FEEDBACK == 'true' }}
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run: |
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# Reads the content of the README.md file into an output variable.
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# The `EOF` marker is used to handle multi-line file content.
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echo "instructions=$(cat README.md | sed 's/\"/\\\"/g' | sed 's/$/\\n/' | tr -d '\n' | sed 's/\\n/\\\\n/g')" >> $GITHUB_OUTPUT
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- name: Read source code
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id: source_code
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if: ${{ vars.ENABLE_AI_FEEDBACK == 'true' }}
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run: |
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{
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echo 'source_code<<EOF'
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find src/main/java -type f -name "*.java" | while read -r file; do
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echo "=== File: $file ==="
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cat "$file"
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echo
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done
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echo 'EOF'
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} >> "$GITHUB_OUTPUT"
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- name: Read test code
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id: test_code
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if: ${{ vars.ENABLE_AI_FEEDBACK == 'true' }}
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run: |
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{
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echo 'test_code<<EOF'
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if [ -d "src/test/java" ]; then
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find src/test/java -type f -name "*.java" | while read -r file; do
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echo "=== File: $file ==="
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cat "$file"
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echo
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done
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else
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echo "No test code found."
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fi
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echo 'EOF'
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} >> "$GITHUB_OUTPUT"
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- name: Generate AI Feedback
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id: ai_feedback
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if: ${{ vars.ENABLE_AI_FEEDBACK == 'true' }}
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run: |
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# This step sends the collected data to the OpenRouter API.
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INSTRUCTIONS=$(jq -Rs . <<'EOF'
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${{ steps.instructions.outputs.instructions }}
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EOF
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)
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SOURCE_CODE=$(jq -Rs . <<'EOF'
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${{ steps.source_code.outputs.source_code }}
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EOF
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)
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TEST_CODE=$(jq -Rs . <<'EOF'
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${{ steps.test_code.outputs.test_code }}
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EOF
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)
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if [ -z "$INSTRUCTIONS" ] || [ -z "$SOURCE_CODE" ] || [ -z "$TEST_CODE" ]; then
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echo "Error: One or more required variables are not set."
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exit 1
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fi
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# Assigning to USER_CONTENT with variable expansion
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PAYLOAD="Please provide feedback on the following Java assignment.
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--- Assignment Instructions ---
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${INSTRUCTIONS}
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--- Source files ---
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${SOURCE_CODE}
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--- Test files ---
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${TEST_CODE}"
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JSON_CONTENT=$(jq -n \
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--argjson model "$OPENROUTER_MODEL" \
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--arg system_prompt "$SYSTEM_PROMPT" \
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--arg payload "$PAYLOAD" \
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'{
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models: $model,
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messages: [
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{role: "system", content: $system_prompt},
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{role: "user", content: $payload}
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]
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}')
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echo "$JSON_CONTENT"
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API_RESPONSE=$(echo "$JSON_CONTENT" | curl https://openrouter.ai/api/v1/chat/completions \
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-H "Authorization: Bearer ${{ secrets.OPENROUTER_API_KEY }}" \
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-H "Content-Type: application/json" \
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-d @-)
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echo "$API_RESPONSE"
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FEEDBACK_CONTENT=$(echo "$API_RESPONSE" | jq -r '.choices[0].message.content')
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echo "feedback<<EOF" >> $GITHUB_OUTPUT
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echo "$FEEDBACK_CONTENT" >> $GITHUB_OUTPUT
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echo "EOF" >> $GITHUB_OUTPUT
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- name: Post Feedback as PR Comment ✍️
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if: ${{ vars.ENABLE_AI_FEEDBACK == 'true' && github.event_name == 'pull_request' }}
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uses: actions/github-script@v8
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env:
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FEEDBACK_BODY: ${{ steps.ai_feedback.outputs.feedback }}
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with:
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github-token: ${{ secrets.GITHUB_TOKEN }}
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script: |
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const prNumber = context.payload.pull_request.number;
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const { owner, repo } = context.repo;
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const signature = "🤖 AI Feedback";
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const timestamp = new Date().toISOString();
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const newEntry = `🕒 _Posted on ${timestamp}_\n\n${process.env.FEEDBACK_BODY}\n\n---\n`;
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const { data: comments } = await github.rest.issues.listComments({
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owner,
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repo,
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issue_number: prNumber,
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per_page: 100
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});
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const existing = comments.find(c =>
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c.user?.login === "github-actions[bot]" &&
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c.body?.includes(signature)
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);
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if (existing) {
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const previousContent = existing.body.replace(/^### 🤖 AI Feedback\s*/, '').trim();
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const collapsed = `<details><summary>Previous Feedback</summary>\n\n${previousContent}\n</details>`;
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const updatedBody = `### ${signature}\n\n${newEntry}${collapsed}`;
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await github.rest.issues.updateComment({
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owner,
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repo,
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comment_id: existing.id,
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body: updatedBody
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});
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} else {
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const body = `### ${signature}\n\n${newEntry}`;
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await github.rest.issues.createComment({
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owner,
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repo,
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issue_number: prNumber,
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body
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});
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}
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- name: Set up Java 25
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uses: actions/setup-java@v5
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with:
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distribution: 'temurin'
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java-version: '25'
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- name: Check for modified files and test presence
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id: code-check
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run: |
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# Ensure full history
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git fetch origin main
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# Determine branch name safely
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BRANCH_NAME="${{ github.head_ref || github.ref_name }}"
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echo "Using branch: $BRANCH_NAME"
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git checkout "$BRANCH_NAME"
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git branch --set-upstream-to=origin/main "$BRANCH_NAME"
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# Check for test files
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has_tests=$(find src/test/java -type f -name "*.java" | grep -q . && echo "true" || echo "false")
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# Check for modified files
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changed_files=$(git diff --name-only origin/main...HEAD | grep -E '^src/(main|test)/java/.*\.java$' || true)
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has_changes=$(test -n "$changed_files" && echo "true" || echo "false")
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echo "has_tests=$has_tests" >> $GITHUB_OUTPUT
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echo "has_changes=$has_changes" >> $GITHUB_OUTPUT
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echo "should_grade=$([[ $has_tests == 'true' && $has_changes == 'true' ]] && echo 'true' || echo 'false')" >> $GITHUB_OUTPUT
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- name: Compilation Check
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id: compilation-check
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if: ${{ steps.code-check.outputs.has_tests == 'true' && steps.code-check.outputs.has_changes == 'true' }}
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uses: classroom-resources/autograding-command-grader@v1
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with:
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test-name: Compilation Check
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command: mvn -ntp compile
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timeout: 10
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max-score: 1
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- name: Tests
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id: basic-tests
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if: ${{ steps.code-check.outputs.has_tests == 'true' && steps.code-check.outputs.has_changes == 'true' }}
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uses: classroom-resources/autograding-command-grader@v1
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with:
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test-name: Tests
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command: mvn -ntp test
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timeout: 10
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max-score: 1
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- name: Autograding Reporter
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if: ${{ steps.code-check.outputs.should_grade == 'true' }}
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uses: classroom-resources/autograding-grading-reporter@v1
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env:
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COMPILATION-CHECK_RESULTS: "${{steps.compilation-check.outputs.result}}"
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BASIC-TESTS_RESULTS: "${{steps.basic-tests.outputs.result}}"
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with:
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runners: compilation-check,basic-tests
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- name: Reporter Skipped Notice
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if: ${{ steps.code-check.outputs.should_grade != 'true' }}
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run: |
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echo "🛑 Skipping reporter: No grading results available due to missing tests or unchanged code."

‎.gitignore‎

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target/
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/.idea/

‎.mvn/wrapper/maven-wrapper.properties‎

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wrapperVersion=3.3.4
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distributionType=only-script
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distributionUrl=https://repo.maven.apache.org/maven2/org/apache/maven/apache-maven/3.9.11/apache-maven-3.9.11-bin.zip

‎README.md‎

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# JavaFX Chat App 💬
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A JavaFX-based chat client using [ntfy](https://docs.ntfy.sh/) for backend messaging.
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## Features
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- MVC architecture
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- Send text messages to configurable topic via [JSON POST](https://docs.ntfy.sh/publish/#publish-as-json)
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- Receive messages via [JSON stream](https://docs.ntfy.sh/subscribe/api/)
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- Backend URL via env variable (not committed)
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- Branch + PR workflow (no direct commits to `main`)
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- Unit tests for `Model` class
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- (Advanced) Send files via "Attach local file" option
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## 🚀 Run Instructions
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1. Set `JAVA_HOME` to JDK 25
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2. Start with:
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```bash
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./mvnw clean javafx:run

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