integration-google-drive-sdd-software-design-document

title: Google Drive Integration - Software Design Document type: reference component_type: reference version: 1.0.0 created: '2025-12-27' updated: '2025-12-27' status: draft tags:

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backend summary: 'Google Drive Integration - Software Design Document Project: CODITECT Google Drive Integration Version: 1.0.0 Status: Planning Last Updated: December 17, 2025 --- Executive Summary This document defines the software design for integrating Google...' moe_confidence: 0.950 moe_classified: 2025-12-31

Google Drive Integration - Software Design Document

Project: CODITECT Google Drive Integration Version: 1.0.0 Status: Planning Last Updated: December 17, 2025

1. Executive Summary

This document defines the software design for integrating Google Drive with CODITECT. The integration enables file storage, sharing, collaboration, and synchronization for project assets, meeting recordings, and team documents.

1.1 Purpose

File Storage - Cloud storage for project files, recordings, and assets
Real-time Collaboration - Shared workspaces with live sync
Version Control - Track document revisions and history
Access Management - Granular permissions per file/folder

1.2 Scope

Feature	Included	Notes
File Upload/Download	Yes	All file types
Folder Management	Yes	Create, move, share
Search	Yes	Full-text and metadata
Sharing & Permissions	Yes	Users, groups, links
Real-time Sync	Yes	Push notifications via webhooks
Revision History	Yes	View and restore versions
Trash Management	Yes	Soft delete, restore, permanent delete
Google Workspace Docs	Partial	Redirect to Google Docs integration

2. System Architecture

2.1 High-Level Architecture

CODITECT Platform
       │
       ▼
┌─────────────────────────────────────────────────────────┐
│                  Google Drive Integration               │
├─────────────────────────────────────────────────────────┤
│  ┌─────────────┐  ┌──────────────┐  ┌───────────────┐  │
│  │ DriveClient │  │ FileManager  │  │ ShareManager  │  │
│  │             │  │              │  │               │  │
│  │ - Auth      │  │ - Upload     │  │ - Permissions │  │
│  │ - API calls │  │ - Download   │  │ - Share links │  │
│  │ - Rate limit│  │ - Copy/Move  │  │ - Team access │  │
│  └─────────────┘  └──────────────┘  └───────────────┘  │
│                                                         │
│  ┌─────────────┐  ┌──────────────┐  ┌───────────────┐  │
│  │SearchService│  │ SyncService  │  │ WebhookHandler│  │
│  │             │  │              │  │               │  │
│  │ - Full-text │  │ - Watch      │  │ - Push notify │  │
│  │ - Metadata  │  │ - Changes    │  │ - Verify      │  │
│  │ - Filters   │  │ - Sync state │  │ - Route       │  │
│  └─────────────┘  └──────────────┘  └───────────────┘  │
└─────────────────────────────────────────────────────────┘
       │
       ▼
Google Drive API v3 (REST)

2.2 Component Overview

Component	Responsibility
DriveClient	Authenticated API client with retry logic
FileManager	File CRUD operations and transfers
FolderManager	Folder structure and organization
ShareManager	Permissions and sharing links
SearchService	Full-text and metadata search
SyncService	Real-time sync with change detection
WebhookHandler	Process push notification callbacks

3. Data Models

3.1 Core Entities

@dataclass
class DriveFile:
    """Google Drive file metadata."""
    id: str
    name: str
    mime_type: str
    size: int
    created_time: datetime
    modified_time: datetime
    parents: List[str]  # Parent folder IDs
    owners: List[DriveUser]
    shared: bool
    web_view_link: Optional[str]
    web_content_link: Optional[str]
    thumbnail_link: Optional[str]
    md5_checksum: Optional[str]
    version: int
    trashed: bool

@dataclass
class DriveFolder:
    """Google Drive folder metadata."""
    id: str
    name: str
    parents: List[str]
    created_time: datetime
    shared: bool
    color_rgb: Optional[str]

@dataclass
class DriveUser:
    """Drive user information."""
    email: str
    display_name: str
    photo_link: Optional[str]
    permission_id: Optional[str]

@dataclass
class Permission:
    """File/folder permission."""
    id: str
    type: PermissionType  # user, group, domain, anyone
    role: PermissionRole  # owner, organizer, writer, commenter, reader
    email_address: Optional[str]
    domain: Optional[str]
    allow_file_discovery: bool
    expiration_time: Optional[datetime]

@dataclass
class SharedLink:
    """Shareable link for file access."""
    id: str
    file_id: str
    role: PermissionRole
    type: str  # view, comment, edit
    url: str
    expiration: Optional[datetime]
    password_protected: bool

@dataclass
class FileRevision:
    """File version/revision."""
    id: str
    modified_time: datetime
    keep_forever: bool
    published: bool
    original_filename: str
    md5_checksum: str
    size: int

@dataclass
class ChangeEvent:
    """Drive change notification."""
    kind: str
    change_type: str
    time: datetime
    file_id: Optional[str]
    removed: bool
    file: Optional[DriveFile]

@dataclass
class WatchChannel:
    """Push notification channel."""
    id: str
    resource_id: str
    resource_uri: str
    expiration: datetime
    token: Optional[str]

3.2 Enumerations

class PermissionType(Enum):
    USER = "user"
    GROUP = "group"
    DOMAIN = "domain"
    ANYONE = "anyone"

class PermissionRole(Enum):
    OWNER = "owner"
    ORGANIZER = "organizer"
    FILE_ORGANIZER = "fileOrganizer"
    WRITER = "writer"
    COMMENTER = "commenter"
    READER = "reader"

class MimeType(Enum):
    FOLDER = "application/vnd.google-apps.folder"
    DOCUMENT = "application/vnd.google-apps.document"
    SPREADSHEET = "application/vnd.google-apps.spreadsheet"
    PRESENTATION = "application/vnd.google-apps.presentation"
    FORM = "application/vnd.google-apps.form"
    DRAWING = "application/vnd.google-apps.drawing"
    SHORTCUT = "application/vnd.google-apps.shortcut"

4. API Design

4.1 REST Endpoints

File Operations

Method	Endpoint	Description
GET	`/api/v1/drive/files`	List files with filters
GET	`/api/v1/drive/files/{file_id}`	Get file metadata
POST	`/api/v1/drive/files`	Create file (with upload)
PATCH	`/api/v1/drive/files/{file_id}`	Update file metadata
DELETE	`/api/v1/drive/files/{file_id}`	Trash file
GET	`/api/v1/drive/files/{file_id}/download`	Download file content
POST	`/api/v1/drive/files/{file_id}/copy`	Copy file
POST	`/api/v1/drive/files/{file_id}/move`	Move file

Folder Operations

Method	Endpoint	Description
GET	`/api/v1/drive/folders`	List folders
GET	`/api/v1/drive/folders/{folder_id}`	Get folder with contents
POST	`/api/v1/drive/folders`	Create folder
PATCH	`/api/v1/drive/folders/{folder_id}`	Update folder
DELETE	`/api/v1/drive/folders/{folder_id}`	Trash folder

Method	Endpoint	Description
GET	`/api/v1/drive/files/{file_id}/permissions`	List permissions
POST	`/api/v1/drive/files/{file_id}/permissions`	Add permission
PATCH	`/api/v1/drive/files/{file_id}/permissions/{perm_id}`	Update permission
DELETE	`/api/v1/drive/files/{file_id}/permissions/{perm_id}`	Remove permission
POST	`/api/v1/drive/files/{file_id}/share-link`	Create share link

Search & Sync

Method	Endpoint	Description
POST	`/api/v1/drive/search`	Search files
GET	`/api/v1/drive/changes`	Get changes since token
POST	`/api/v1/drive/watch`	Start watching for changes
DELETE	`/api/v1/drive/watch/{channel_id}`	Stop watching

4.2 Request/Response Examples

Upload File:

POST /api/v1/drive/files
Content-Type: multipart/form-data

{
  "metadata": {
    "name": "meeting-recording.mp4",
    "parent_id": "folder_abc123",
    "description": "Team standup recording"
  },
  "file": <binary data>
}

Response:
{
  "id": "file_xyz789",
  "name": "meeting-recording.mp4",
  "mime_type": "video/mp4",
  "size": 52428800,
  "created_time": "2025-12-17T10:30:00Z",
  "web_view_link": "https://drive.google.com/file/d/file_xyz789/view"
}

Search Files:

POST /api/v1/drive/search
{
  "query": "meeting notes",
  "mime_type": "application/vnd.google-apps.document",
  "modified_after": "2025-12-01T00:00:00Z",
  "shared_with_me": true,
  "max_results": 25
}

Response:
{
  "files": [...],
  "next_page_token": "token_abc"
}

5. Integration with CODITECT

5.1 Use Cases

Use Case	Description
Meeting Recording Storage	Auto-upload Zoom/Meet recordings to project folder
Project Asset Management	Store project files in organized folder structure
Team Collaboration	Shared folders with appropriate permissions
Version History	Track changes to project documents
Cross-Integration Sync	Sync files between Drive and other integrations

5.2 Folder Structure Convention

CODITECT/
├── Projects/
│   ├── {project_name}/
│   │   ├── Recordings/
│   │   ├── Documents/
│   │   ├── Assets/
│   │   └── Exports/
├── Team/
│   ├── {team_name}/
│   │   ├── Shared/
│   │   └── Templates/
└── Personal/
    └── {user_email}/

5.3 Integration with Other CODITECT Modules

# Meeting recording auto-upload
@meeting_ended.listener
async def upload_recording(meeting: Meeting, recording: Recording):
    folder_id = await drive.get_or_create_folder(
        path=f"CODITECT/Projects/{meeting.project_id}/Recordings"
    )
    file = await drive.upload_file(
        content=recording.data,
        name=f"{meeting.title}_{meeting.date}.mp4",
        parent_id=folder_id
    )
    # Share with meeting participants
    for attendee in meeting.attendees:
        await drive.add_permission(
            file_id=file.id,
            email=attendee.email,
            role=PermissionRole.READER
        )

6. Security Considerations

6.1 OAuth 2.0 Scopes

Scope	Purpose	Sensitivity
`drive.file`	Files created by app only	Low (recommended)
`drive`	Full Drive access	High (avoid if possible)
`drive.readonly`	Read-only access	Medium
`drive.metadata.readonly`	Metadata only	Low
`drive.appdata`	App-specific folder	Low

Recommended: Use drive.file scope when possible.

6.2 Permission Best Practices

Principle of Least Privilege - Request minimum necessary scopes
Time-Limited Sharing - Set expiration on share links
Audit Logging - Log all permission changes
No Public Links by Default - Require explicit "anyone" sharing

6.3 Data Protection

All uploads encrypted in transit (TLS 1.3)
Google encrypts at rest
Implement file type validation
Scan for malware before upload (optional)
Respect retention policies

7. Error Handling

7.1 Error Codes

Code	Description	Action
401	Unauthorized	Refresh OAuth token
403	Forbidden	Check permissions/scopes
404	Not Found	File deleted or moved
429	Rate Limited	Exponential backoff
500	Server Error	Retry with backoff

7.2 Retry Strategy

RETRY_CONFIG = {
    "max_retries": 3,
    "base_delay": 1.0,
    "max_delay": 32.0,
    "exponential_base": 2,
    "retry_codes": [429, 500, 502, 503, 504]
}

8. Performance Considerations

8.1 Rate Limits

Operation	Limit
Queries	12,000 per 100 seconds
Uploads	750 MB per 100 seconds
Per-user	10 requests per second

8.2 Optimization Strategies

Batch Requests - Combine multiple operations
Partial Responses - Request only needed fields
Resumable Uploads - For files > 5MB
Change Polling - Use start page token for efficient sync
Caching - Cache metadata for frequently accessed files

9. Monitoring & Observability

9.1 Metrics

Metric	Description
`drive.api.requests`	Total API requests
`drive.api.errors`	Failed requests by type
`drive.upload.size`	Upload size distribution
`drive.download.size`	Download size distribution
`drive.sync.latency`	Sync delay from change to notification

9.2 Alerts

Upload failure rate > 5%
API error rate > 1%
Rate limit warnings (> 80% utilization)
OAuth token expiration warnings

10. Dependencies

Dependency	Version	Purpose
google-api-python-client	2.x	Google Drive API
google-auth	2.x	OAuth 2.0 authentication
google-auth-oauthlib	1.x	OAuth flow helpers
httpx	0.25+	Async HTTP client
python-magic	0.4+	File type detection

Appendix A: Google Drive API Reference

API Endpoints:

Resource	Base URL
Files	`https://www.googleapis.com/drive/v3/files`
Changes	`https://www.googleapis.com/drive/v3/changes`
Permissions	`https://www.googleapis.com/drive/v3/files/{fileId}/permissions`
Revisions	`https://www.googleapis.com/drive/v3/files/{fileId}/revisions`
Comments	`https://www.googleapis.com/drive/v3/files/{fileId}/comments`

Documentation: https://developers.google.com/drive/api/v3/reference

Document Control:

Created: December 17, 2025
Owner: CODITECT Engineering Team

Google Drive Integration - Software Design Document

1. Executive Summary​

1.1 Purpose​

1.2 Scope​

2. System Architecture​

2.1 High-Level Architecture​

2.2 Component Overview​

3. Data Models​

3.1 Core Entities​

3.2 Enumerations​

4. API Design​

4.1 REST Endpoints​

File Operations​

Folder Operations​

Sharing Operations​

Search & Sync​

4.2 Request/Response Examples​

5. Integration with CODITECT​

5.1 Use Cases​

5.2 Folder Structure Convention​

5.3 Integration with Other CODITECT Modules​

6. Security Considerations​

6.1 OAuth 2.0 Scopes​

6.2 Permission Best Practices​

6.3 Data Protection​

7. Error Handling​

7.1 Error Codes​

7.2 Retry Strategy​

8. Performance Considerations​

8.1 Rate Limits​

8.2 Optimization Strategies​

9. Monitoring & Observability​

9.1 Metrics​

9.2 Alerts​

10. Dependencies​

Appendix A: Google Drive API Reference​