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feat: Implement Phase 4 Web Interface with bugfixes (v0.5.2)

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## Phase 4: Web Interface Implementation

Implemented complete web interface with public and admin routes,
templates, CSS, and development authentication.

### Core Features

**Public Routes**:
- Homepage with recent published notes
- Note permalinks with microformats2
- Server-side rendering (Jinja2)

**Admin Routes**:
- Login via IndieLogin
- Dashboard with note management
- Create, edit, delete notes
- Protected with @require_auth decorator

**Development Authentication**:
- Dev login bypass for local testing (DEV_MODE only)
- Security safeguards per ADR-011
- Returns 404 when disabled

**Templates & Frontend**:
- Base layouts (public + admin)
- 8 HTML templates with microformats2
- Custom responsive CSS (114 lines)
- Error pages (404, 500)

### Bugfixes (v0.5.1 → v0.5.2)

1. **Cookie collision fix (v0.5.1)**:
   - Renamed auth cookie from "session" to "starpunk_session"
   - Fixed redirect loop between dev login and admin dashboard
   - Flask's session cookie no longer conflicts with auth

2. **HTTP 404 error handling (v0.5.1)**:
   - Update route now returns 404 for nonexistent notes
   - Delete route now returns 404 for nonexistent notes
   - Follows ADR-012 HTTP Error Handling Policy
   - Pattern consistency across all admin routes

3. **Note model enhancement (v0.5.2)**:
   - Exposed deleted_at field from database schema
   - Enables soft deletion verification in tests
   - Follows ADR-013 transparency principle

### Architecture

**New ADRs**:
- ADR-011: Development Authentication Mechanism
- ADR-012: HTTP Error Handling Policy
- ADR-013: Expose deleted_at Field in Note Model

**Standards Compliance**:
- Uses uv for Python environment
- Black formatted, Flake8 clean
- Follows git branching strategy
- Version incremented per versioning strategy

### Test Results

- 405/406 tests passing (99.75%)
- 87% code coverage
- All security tests passing
- Manual testing confirmed working

### Documentation

- Complete implementation reports in docs/reports/
- Architecture reviews in docs/reviews/
- Design documents in docs/design/
- CHANGELOG updated for v0.5.2

### Files Changed

**New Modules**:
- starpunk/dev_auth.py
- starpunk/routes/ (public, admin, auth, dev_auth)

**Templates**: 10 files (base, pages, admin, errors)
**Static**: CSS and optional JavaScript
**Tests**: 4 test files for routes and templates
**Docs**: 20+ architectural and implementation documents

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>
This commit is contained in:
Phil Skentelbery
2025-11-18 23:01:53 -07:00
parent 575a02186b
commit 0cca8169ce
56 changed files with 13151 additions and 304 deletions
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docs/reports/delete-route-implementation-spec.md Normal file
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# Delete Route Implementation Specification
**Date**: 2025-11-18
**Component**: Admin Routes - Delete Note
**File**: `/home/phil/Projects/starpunk/starpunk/routes/admin.py`
**Function**: `delete_note_submit()` (lines 173-206)
**ADR**: ADR-012 (HTTP Error Handling Policy)
## Implementation Requirements
### Objective
Modify the delete route to check note existence before deletion and return HTTP 404 with an error message when attempting to delete a nonexistent note.
## Exact Code Change
### Current Implementation (Lines 173-206)
```python
@bp.route("/delete/<int:note_id>", methods=["POST"])
@require_auth
def delete_note_submit(note_id: int):
"""
Handle note deletion
Deletes a note after confirmation.
Requires authentication.
Args:
note_id: Database ID of note to delete
Form data:
confirm: Must be 'yes' to proceed with deletion
Returns:
Redirect to dashboard with success/error message
Decorator: @require_auth
"""
# Check for confirmation
if request.form.get("confirm") != "yes":
flash("Deletion cancelled", "info")
return redirect(url_for("admin.dashboard"))
try:
delete_note(id=note_id, soft=False)
flash("Note deleted successfully", "success")
except ValueError as e:
flash(f"Error deleting note: {e}", "error")
except Exception as e:
flash(f"Unexpected error deleting note: {e}", "error")
return redirect(url_for("admin.dashboard"))
```
### Required Implementation (Lines 173-206)
```python
@bp.route("/delete/<int:note_id>", methods=["POST"])
@require_auth
def delete_note_submit(note_id: int):
"""
Handle note deletion
Deletes a note after confirmation.
Requires authentication.
Args:
note_id: Database ID of note to delete
Form data:
confirm: Must be 'yes' to proceed with deletion
Returns:
Redirect to dashboard with success/error message
Decorator: @require_auth
"""
# Check if note exists first (per ADR-012)
existing_note = get_note(id=note_id, load_content=False)
if not existing_note:
flash("Note not found", "error")
return redirect(url_for("admin.dashboard")), 404
# Check for confirmation
if request.form.get("confirm") != "yes":
flash("Deletion cancelled", "info")
return redirect(url_for("admin.dashboard"))
try:
delete_note(id=note_id, soft=False)
flash("Note deleted successfully", "success")
except ValueError as e:
flash(f"Error deleting note: {e}", "error")
except Exception as e:
flash(f"Unexpected error deleting note: {e}", "error")
return redirect(url_for("admin.dashboard"))
```
## Line-by-Line Changes
### Insert After Line 192 (after docstring, before confirmation check)
**Add these 4 lines**:
```python
# Check if note exists first (per ADR-012)
existing_note = get_note(id=note_id, load_content=False)
if not existing_note:
flash("Note not found", "error")
return redirect(url_for("admin.dashboard")), 404
```
**Result**: Lines shift down by 5 (including blank line)
### No Other Changes Required
- Docstring: No changes
- Confirmation check: No changes (shifts to line 199)
- Deletion logic: No changes (shifts to line 203)
- Return statement: No changes (shifts to line 211)
## Implementation Details
### Function Call: `get_note(id=note_id, load_content=False)`
**Purpose**: Check if note exists in database
**Parameters**:
- `id=note_id`: Look up by database ID (primary key)
- `load_content=False`: Metadata only (no file I/O)
**Returns**:
- `Note` object if found
- `None` if not found or soft-deleted
**Performance**: ~0.1ms (single SELECT query)
### Flash Message: `"Note not found"`
**Purpose**: User-facing error message
**Category**: `"error"` (red alert in UI)
**Why this wording**:
- Consistent with edit route (line 151)
- Simple and clear
- Test checks for "not found" substring
- ADR-012 example uses this exact message
### Return Statement: `return redirect(url_for("admin.dashboard")), 404`
**Purpose**: Return HTTP 404 with redirect
**Flask Pattern**: Tuple `(response, status_code)`
- First element: Response object (redirect)
- Second element: HTTP status code (404)
**Result**:
- HTTP 404 status sent to client
- Location header: `/admin/`
- Flash message stored in session
- Client can follow redirect to see error
**Why not just return 404 error page**:
- Better UX (user sees dashboard with error, not blank 404 page)
- Consistent with update route pattern
- Per ADR-012: "404 responses MAY redirect to a safe location"
## Validation Checklist
### Before Implementing
- [ ] Read ADR-012 (HTTP Error Handling Policy)
- [ ] Review similar implementation in `update_note_submit()` (line 148-152)
- [ ] Verify `get_note` is imported (line 15 - already imported ✅)
- [ ] Verify test expectations in `test_delete_nonexistent_note_shows_error`
### After Implementing
- [ ] Code follows exact pattern from update route
- [ ] Existence check happens BEFORE confirmation check
- [ ] Flash message is "Note not found" with category "error"
- [ ] Return statement includes 404 status code
- [ ] No other logic changed
- [ ] Imports unchanged (get_note already imported)
### Testing
- [ ] Run failing test: `uv run pytest tests/test_routes_admin.py::TestAdminDeleteRoutes::test_delete_nonexistent_note_shows_error -v`
- [ ] Verify test now passes
- [ ] Run all delete route tests: `uv run pytest tests/test_routes_admin.py::TestAdminDeleteRoutes -v`
- [ ] Verify all tests still pass (no regressions)
- [ ] Run full admin route tests: `uv run pytest tests/test_routes_admin.py -v`
- [ ] Verify 406/406 tests pass
## Expected Test Results
### Before Fix
```
FAILED tests/test_routes_admin.py::TestAdminDeleteRoutes::test_delete_nonexistent_note_shows_error
AssertionError: assert False
+ where False = (b'error' in b'...deleted successfully...' or b'not found' in b'...')
```
### After Fix
```
PASSED tests/test_routes_admin.py::TestAdminDeleteRoutes::test_delete_nonexistent_note_shows_error
```
## Edge Cases Handled
### Case 1: Note Exists
**Scenario**: User deletes existing note
**Behavior**:
1. Existence check passes (note found)
2. Confirmation check (if confirmed, proceed)
3. Deletion succeeds
4. Flash: "Note deleted successfully"
5. Return: 302 redirect
**Test Coverage**: `test_delete_redirects_to_dashboard`
### Case 2: Note Doesn't Exist
**Scenario**: User deletes nonexistent note (ID 99999)
**Behavior**:
1. Existence check fails (note not found)
2. Flash: "Note not found"
3. Return: 404 with redirect (no deletion attempted)
**Test Coverage**: `test_delete_nonexistent_note_shows_error` ← This fix
### Case 3: Note Soft-Deleted
**Scenario**: User deletes note that was already soft-deleted
**Behavior**:
1. `get_note()` excludes soft-deleted notes (WHERE deleted_at IS NULL)
2. Existence check fails (note not found from user perspective)
3. Flash: "Note not found"
4. Return: 404 with redirect
**Test Coverage**: Covered by `get_note()` behavior (implicit)
### Case 4: Deletion Not Confirmed
**Scenario**: User submits form without `confirm=yes`
**Behavior**:
1. Existence check passes (note found)
2. Confirmation check fails
3. Flash: "Deletion cancelled"
4. Return: 302 redirect (no deletion, no 404)
**Test Coverage**: Existing tests (no change)
## Performance Impact
### Database Queries
**Before**:
1. DELETE query (inside delete_note)
**After**:
1. SELECT query (get_note - existence check)
2. DELETE query (inside delete_note)
**Overhead**: ~0.1ms per deletion request
### Why This is Acceptable
1. Single-user system (not high traffic)
2. Deletions are rare operations
3. Correctness > performance for edge cases
4. Consistent with update route (already accepts this overhead)
5. `load_content=False` avoids file I/O (only metadata query)
## Consistency with Other Routes
### Edit Routes (Already Implemented)
**GET /admin/edit/<id>** (line 118-122):
```python
note = get_note(id=note_id)
if not note:
flash("Note not found", "error")
return redirect(url_for("admin.dashboard")), 404
```
**POST /admin/edit/<id>** (line 148-152):
```python
# Check if note exists first
existing_note = get_note(id=note_id, load_content=False)
if not existing_note:
flash("Note not found", "error")
return redirect(url_for("admin.dashboard")), 404
```
### Delete Route (This Implementation)
**POST /admin/delete/<id>** (new lines 193-197):
```python
# Check if note exists first (per ADR-012)
existing_note = get_note(id=note_id, load_content=False)
if not existing_note:
flash("Note not found", "error")
return redirect(url_for("admin.dashboard")), 404
```
**Pattern Consistency**: ✅ 100% identical to update route
## ADR-012 Compliance
### Required Elements
| Requirement | Status |
|-------------|--------|
| Return 404 for nonexistent resource | ✅ Yes (`return ..., 404`) |
| Check existence before operation | ✅ Yes (`get_note()` before `delete_note()`) |
| Include user-friendly flash message | ✅ Yes (`flash("Note not found", "error")`) |
| Redirect to safe location | ✅ Yes (`redirect(url_for("admin.dashboard"))`) |
### Implementation Pattern (ADR-012, lines 56-74)
**Spec Pattern**:
```python
@bp.route("/operation/<int:resource_id>", methods=["GET", "POST"])
@require_auth
def operation(resource_id: int):
# 1. CHECK EXISTENCE FIRST
resource = get_resource(id=resource_id)
if not resource:
flash("Resource not found", "error")
return redirect(url_for("admin.dashboard")), 404 # ← MUST return 404
# ...
```
**Our Implementation**: ✅ Follows pattern exactly
## Common Implementation Mistakes to Avoid
### Mistake 1: Check Existence After Confirmation
**Wrong**:
```python
# Check for confirmation
if request.form.get("confirm") != "yes":
# ...
# Check if note exists ← TOO LATE
existing_note = get_note(id=note_id, load_content=False)
```
**Why Wrong**: User confirms deletion of nonexistent note, then gets 404
**Correct**: Check existence FIRST (before any user interaction)
### Mistake 2: Forget load_content=False
**Wrong**:
```python
existing_note = get_note(id=note_id) # Loads file content
```
**Why Wrong**: Unnecessary file I/O (we only need to check existence)
**Correct**: `get_note(id=note_id, load_content=False)` (metadata only)
### Mistake 3: Return 302 Instead of 404
**Wrong**:
```python
if not existing_note:
flash("Note not found", "error")
return redirect(url_for("admin.dashboard")) # ← Missing 404
```
**Why Wrong**: Returns HTTP 302 (redirect), not 404 (not found)
**Correct**: `return redirect(...), 404` (tuple with status code)
### Mistake 4: Wrong Flash Message Category
**Wrong**:
```python
flash("Note not found", "info") # ← Should be "error"
```
**Why Wrong**: Not an error in UI (blue alert, not red)
**Correct**: `flash("Note not found", "error")` (red error alert)
### Mistake 5: Catching NoteNotFoundError from delete_note()
**Wrong**:
```python
try:
delete_note(id=note_id, soft=False)
except NoteNotFoundError: # ← delete_note doesn't raise this
flash("Note not found", "error")
return redirect(...), 404
```
**Why Wrong**:
- `delete_note()` is idempotent (doesn't raise on missing note)
- Existence check should happen BEFORE calling delete_note
- Violates separation of concerns (route layer vs data layer)
**Correct**: Explicit existence check before deletion (as specified)
## Final Verification
### Code Review Checklist
- [ ] Existence check is first operation (after docstring)
- [ ] Uses `get_note(id=note_id, load_content=False)` exactly
- [ ] Flash message is `"Note not found"` with category `"error"`
- [ ] Return statement is `return redirect(url_for("admin.dashboard")), 404`
- [ ] No changes to confirmation logic
- [ ] No changes to deletion logic
- [ ] No changes to exception handling
- [ ] No changes to imports
- [ ] Code matches update route pattern exactly
### Test Validation
1. Run specific test: Should PASS
2. Run delete route tests: All should PASS
3. Run admin route tests: All should PASS (406/406)
4. Run full test suite: All should PASS
### Documentation
- [ ] This implementation spec reviewed
- [ ] Root cause analysis document reviewed
- [ ] ADR-012 referenced and understood
- [ ] Changes documented in changelog
- [ ] Version incremented per versioning strategy
## Summary
**Change**: Add 4 lines (existence check + error handling)
**Location**: After line 192, before confirmation check
**Impact**: 1 test changes from FAIL to PASS
**Result**: 406/406 tests passing ✅
This is the minimal, correct implementation that complies with ADR-012 and maintains consistency with existing routes.