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class ImplementationFixer

Maturity: 43

A utility class that automatically fixes implementation discrepancies between a custom reMarkable tablet upload implementation and the real reMarkable app behavior by modifying source files.

File:
/tf/active/vicechatdev/e-ink-llm/cloudtest/implementation_fixer.py
Lines:
14 - 365
Complexity:
moderate

Purpose

This class identifies and applies fixes to source code files to ensure the custom implementation matches the real reMarkable app's behavior. It updates user-agent strings, metadata source fields, pagedata content, lastOpened fields, and JWT device descriptions across multiple Python files. It also generates a fixed test script and provides a summary of all applied fixes. The class is designed to be run as a one-time fixer or as part of a maintenance workflow to align custom code with observed real app behavior.

Source Code

class ImplementationFixer:
    """Fix our implementation to match real app behavior"""
    
    def __init__(self):
        self.base_dir = Path(__file__).parent
        self.fixes_applied = []
    
    def fix_user_agent(self):
        """Fix user-agent to match real app"""
        print("🔧 Fixing User-Agent...")
        
        # Find files that contain user-agent strings
        files_to_fix = [
            self.base_dir / "upload_manager.py",
            self.base_dir / "auth.py",
            self.base_dir / "test_uploads.py"
        ]
        
        old_ua = "reMarkable-desktop-win/3.11.1.1951"
        new_ua = "desktop/3.20.0.922 (macos 15.4)"
        
        for file_path in files_to_fix:
            if file_path.exists():
                try:
                    with open(file_path, 'r') as f:
                        content = f.read()
                    
                    if old_ua in content:
                        updated_content = content.replace(old_ua, new_ua)
                        with open(file_path, 'w') as f:
                            f.write(updated_content)
                        print(f"   ✅ Updated {file_path.name}")
                        self.fixes_applied.append(f"Updated user-agent in {file_path.name}")
                
                except Exception as e:
                    print(f"   ❌ Failed to update {file_path.name}: {e}")
    
    def fix_metadata_source(self):
        """Fix metadata source field to match real app"""
        print("🔧 Fixing Metadata Source Field...")
        
        files_to_fix = [
            self.base_dir / "upload_manager.py"
        ]
        
        old_source = '"source": "com.remarkable.windows"'
        new_source = '"source": "com.remarkable.macos"'
        
        # Also fix the alternative format
        old_source_alt = "'source': 'com.remarkable.windows'"
        new_source_alt = "'source': 'com.remarkable.macos'"
        
        for file_path in files_to_fix:
            if file_path.exists():
                try:
                    with open(file_path, 'r') as f:
                        content = f.read()
                    
                    updated = False
                    if old_source in content:
                        content = content.replace(old_source, new_source)
                        updated = True
                    
                    if old_source_alt in content:
                        content = content.replace(old_source_alt, new_source_alt)
                        updated = True
                    
                    if updated:
                        with open(file_path, 'w') as f:
                            f.write(content)
                        print(f"   ✅ Updated source field in {file_path.name}")
                        self.fixes_applied.append(f"Updated metadata source in {file_path.name}")
                
                except Exception as e:
                    print(f"   ❌ Failed to update {file_path.name}: {e}")
    
    def fix_pagedata_content(self):
        """Fix pagedata to use newline character instead of empty string"""
        print("🔧 Fixing Pagedata Content...")
        
        files_to_fix = [
            self.base_dir / "upload_manager.py"
        ]
        
        # Look for pagedata creation patterns
        old_patterns = [
            'pagedata = ""',
            "pagedata = ''",
            'pagedata_content = ""',
            "pagedata_content = ''"
        ]
        
        new_pattern = 'pagedata = "\\n"'
        
        for file_path in files_to_fix:
            if file_path.exists():
                try:
                    with open(file_path, 'r') as f:
                        content = f.read()
                    
                    updated = False
                    for old_pattern in old_patterns:
                        if old_pattern in content:
                            content = content.replace(old_pattern, new_pattern)
                            updated = True
                    
                    if updated:
                        with open(file_path, 'w') as f:
                            f.write(content)
                        print(f"   ✅ Updated pagedata content in {file_path.name}")
                        self.fixes_applied.append(f"Updated pagedata content in {file_path.name}")
                
                except Exception as e:
                    print(f"   ❌ Failed to update {file_path.name}: {e}")
    
    def fix_last_opened_field(self):
        """Ensure lastOpened is consistently set to '0'"""
        print("🔧 Fixing LastOpened Field...")
        
        files_to_fix = [
            self.base_dir / "upload_manager.py"
        ]
        
        # Look for lastOpened patterns that might not be "0"
        patterns_to_check = [
            '"lastOpened":',
            "'lastOpened':"
        ]
        
        for file_path in files_to_fix:
            if file_path.exists():
                try:
                    with open(file_path, 'r') as f:
                        lines = f.readlines()
                    
                    updated = False
                    for i, line in enumerate(lines):
                        for pattern in patterns_to_check:
                            if pattern in line and '"0"' not in line and "'0'" not in line:
                                # Fix the line to use "0"
                                if '"lastOpened":' in line:
                                    lines[i] = line.split('"lastOpened":')[0] + '"lastOpened": "0",' + line.split(':')[1].split(',', 1)[1] if ',' in line.split(':')[1] else '\n'
                                updated = True
                    
                    if updated:
                        with open(file_path, 'w') as f:
                            f.writelines(lines)
                        print(f"   ✅ Updated lastOpened field in {file_path.name}")
                        self.fixes_applied.append(f"Fixed lastOpened field in {file_path.name}")
                
                except Exception as e:
                    print(f"   ❌ Failed to update {file_path.name}: {e}")
    
    def fix_jwt_device_description(self):
        """Update JWT generation to use macOS device description"""
        print("🔧 Fixing JWT Device Description...")
        
        # This requires updating the authentication process
        auth_file = self.base_dir / "auth.py"
        
        if auth_file.exists():
            try:
                with open(auth_file, 'r') as f:
                    content = f.read()
                
                # Look for device description patterns
                old_patterns = [
                    'desktop-windows',
                    'desktop-win',
                    'windows'
                ]
                
                new_replacement = 'desktop-macos'
                
                updated = False
                for old_pattern in old_patterns:
                    if old_pattern in content.lower():
                        # This is more complex - we need to identify the specific context
                        print(f"   ⚠️ Found '{old_pattern}' in auth.py - manual review needed")
                        print(f"   📝 Action: Update device registration to use 'desktop-macos'")
                        self.fixes_applied.append(f"JWT device description needs manual update in auth.py")
                        updated = True
                
                if not updated:
                    print("   ℹ️ No obvious device description patterns found in auth.py")
                    print("   📝 Note: JWT device description may be set during token generation")
            
            except Exception as e:
                print(f"   ❌ Failed to analyze auth.py: {e}")
    
    def create_fixed_upload_test(self):
        """Create a test script with all fixes applied"""
        print("🔧 Creating Fixed Upload Test...")
        
        fixed_test_content = '''#!/usr/bin/env python3
"""
Fixed Upload Test - Matches Real App Behavior

This test script incorporates all the fixes identified by dry run analysis.
"""

import os
import json
import time
from pathlib import Path
import uuid

def create_test_document_with_fixes():
    """Create a test document with all real app fixes applied"""
    
    # Generate document UUID
    doc_uuid = str(uuid.uuid4())
    
    # Fixed metadata (matches real app)
    metadata = {
        "createdTime": str(int(time.time() * 1000)),
        "lastModified": str(int(time.time() * 1000)),
        "lastOpened": "0",  # ✅ Fixed: Always "0"
        "lastOpenedPage": 0,
        "metadatamodified": False,
        "modified": False,
        "parent": "",
        "pinned": False,
        "source": "com.remarkable.macos",  # ✅ Fixed: Changed from windows to macos
        "type": "DocumentType",
        "visibleName": "Fixed_Test_Document",
        "version": 1
    }
    
    # Fixed content structure
    content = {
        "coverPageNumber": 0,
        "customZoomCenterX": 0,
        "customZoomCenterY": 936,
        "customZoomOrientation": "portrait",
        "customZoomPageHeight": 1872,
        "customZoomPageWidth": 1404,
        "customZoomScale": 1,
        "documentMetadata": {},
        "extraMetadata": {},
        "fileType": "pdf",
        "fontName": "",
        "formatVersion": 1,
        "lineHeight": -1,
        "orientation": "portrait",
        "originalPageCount": 1,
        "pageCount": 1,
        "pageTags": [],
        "pages": [str(uuid.uuid4())],
        "redirectionPageMap": [0],
        "sizeInBytes": "1000",
        "tags": [],
        "textAlignment": "justify",
        "textScale": 1,
        "zoomMode": "bestFit"
    }
    
    # Fixed pagedata content
    pagedata = "\\n"  # ✅ Fixed: Changed from empty string to newline
    
    # Fixed headers (for reference)
    headers_template = {
        'host': 'eu.tectonic.remarkable.com',
        'authorization': 'Bearer YOUR_TOKEN_HERE',
        'content-type': 'application/octet-stream',
        'rm-batch-number': '1',
        'rm-sync-id': str(uuid.uuid4()),
        'user-agent': 'desktop/3.20.0.922 (macos 15.4)',  # ✅ Fixed: Matches real app
        'connection': 'Keep-Alive',
        'accept-encoding': 'gzip, deflate',
        'accept-language': 'en-BE,*'  # ✅ Fixed: Matches real app locale
    }
    
    print("✅ Test document created with all real app fixes applied:")
    print(f"   📝 Document UUID: {doc_uuid}")
    print(f"   🔧 Metadata source: {metadata['source']}")
    print(f"   🔧 LastOpened: {metadata['lastOpened']}")
    print(f"   🔧 Pagedata: {repr(pagedata)}")
    print(f"   🔧 User-Agent: {headers_template['user-agent']}")
    
    return {
        'uuid': doc_uuid,
        'metadata': metadata,
        'content': content,
        'pagedata': pagedata,
        'headers_template': headers_template
    }

if __name__ == "__main__":
    print("🧪 FIXED UPLOAD TEST - REAL APP BEHAVIOR")
    print("=" * 50)
    
    test_doc = create_test_document_with_fixes()
    
    # Save test data for analysis
    output_file = Path(__file__).parent / "test_results" / "fixed_document_structure.json"
    output_file.parent.mkdir(exist_ok=True)
    
    with open(output_file, 'w') as f:
        json.dump(test_doc, f, indent=2, default=str)
    
    print(f"\\n💾 Fixed document structure saved to: {output_file}")
    print("\\n🎯 Ready for real app behavior testing!")
'''
        
        fixed_test_file = self.base_dir / "fixed_upload_test.py"
        
        try:
            with open(fixed_test_file, 'w') as f:
                f.write(fixed_test_content)
            
            # Make executable
            os.chmod(fixed_test_file, 0o755)
            
            print(f"   ✅ Created {fixed_test_file}")
            self.fixes_applied.append(f"Created fixed upload test script")
        
        except Exception as e:
            print(f"   ❌ Failed to create fixed test: {e}")
    
    def generate_fix_summary(self):
        """Generate a summary of all fixes applied"""
        print("\n📋 FIX SUMMARY")
        print("=" * 50)
        
        if self.fixes_applied:
            print("✅ Fixes Applied:")
            for i, fix in enumerate(self.fixes_applied, 1):
                print(f"   {i}. {fix}")
        else:
            print("❌ No fixes were applied")
        
        # Save summary
        summary = {
            'timestamp': time.time(),
            'fixes_applied': self.fixes_applied,
            'critical_fixes': [
                'User-Agent changed to: desktop/3.20.0.922 (macos 15.4)',
                'Metadata source changed to: com.remarkable.macos',
                'Pagedata content changed to: newline character',
                'LastOpened field standardized to: "0"',
                'JWT device description flagged for manual update'
            ]
        }
        
        summary_file = self.base_dir / "test_results" / f"implementation_fixes_{int(time.time())}.json"
        summary_file.parent.mkdir(exist_ok=True)
        
        with open(summary_file, 'w') as f:
            json.dump(summary, f, indent=2, default=str)
        
        print(f"\n💾 Fix summary saved to: {summary_file}")

Parameters

Name Type Default Kind
bases - -

Parameter Details

__init__: No parameters required. The constructor automatically initializes the base directory (parent directory of the current file) and an empty list to track applied fixes.

Return Value

Instantiation returns an ImplementationFixer object. Methods do not return values but modify files in place and print status messages. The fixes_applied attribute accumulates a list of strings describing each fix applied. The generate_fix_summary method creates a JSON file with the summary but does not return it.

Class Interface

Methods

__init__(self)

Purpose: Initialize the ImplementationFixer with base directory and empty fixes tracking list

Returns: None

fix_user_agent(self)

Purpose: Replace old user-agent string with real app user-agent in upload_manager.py, auth.py, and test_uploads.py

Returns: None (modifies files in place and updates fixes_applied list)

fix_metadata_source(self)

Purpose: Change metadata source field from 'com.remarkable.windows' to 'com.remarkable.macos' in upload_manager.py

Returns: None (modifies files in place and updates fixes_applied list)

fix_pagedata_content(self)

Purpose: Replace empty string pagedata with newline character ('\n') in upload_manager.py

Returns: None (modifies files in place and updates fixes_applied list)

fix_last_opened_field(self)

Purpose: Ensure lastOpened field is consistently set to '0' in metadata structures in upload_manager.py

Returns: None (modifies files in place and updates fixes_applied list)

fix_jwt_device_description(self)

Purpose: Analyze auth.py for device description patterns and flag for manual review (does not auto-fix)

Returns: None (prints warnings and updates fixes_applied list with manual action items)

create_fixed_upload_test(self)

Purpose: Generate a new test script (fixed_upload_test.py) that incorporates all identified fixes

Returns: None (creates new executable Python file and updates fixes_applied list)

generate_fix_summary(self)

Purpose: Print and save a JSON summary of all fixes applied during the session

Returns: None (prints summary to console and saves JSON file to test_results directory)

Attributes

Name Type Description Scope
base_dir Path The base directory path where source files are located (parent directory of the script) instance
fixes_applied list[str] Accumulates descriptions of all fixes successfully applied during the session instance

Dependencies

  • pathlib
  • json
  • os
  • time
  • uuid

Required Imports

from pathlib import Path
import json
import os
import time
import uuid

Usage Example

from implementation_fixer import ImplementationFixer

# Instantiate the fixer
fixer = ImplementationFixer()

# Apply individual fixes
fixer.fix_user_agent()
fixer.fix_metadata_source()
fixer.fix_pagedata_content()
fixer.fix_last_opened_field()
fixer.fix_jwt_device_description()

# Create a fixed test script
fixer.create_fixed_upload_test()

# Generate and save summary
fixer.generate_fix_summary()

# Check what was fixed
print(f"Applied {len(fixer.fixes_applied)} fixes")
for fix in fixer.fixes_applied:
    print(f"  - {fix}")

Best Practices

  • Always backup your source files before running the fixer as it modifies files in place
  • Run the fixer in a version-controlled environment so changes can be reviewed and reverted if needed
  • Call methods in sequence: fix methods first, then create_fixed_upload_test(), then generate_fix_summary()
  • Review the fixes_applied list after execution to verify all intended changes were made
  • The fix_jwt_device_description method only flags issues for manual review rather than automatically fixing them
  • Check console output for error messages (❌) indicating files that couldn't be updated
  • The class assumes specific file names and patterns exist in the codebase; verify these exist before running
  • The fixer is idempotent for most operations but may create duplicate entries if run multiple times on already-fixed code
  • Ensure the base_dir path is correct; it defaults to the parent directory of the script file

Tags

code-fixer file-modification remarkable-tablet implementation-alignment automation refactoring string-replacement metadata-correction testing-utilities

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