From a5371e7476ac8e718d3410f9ed9e605bf491a838 Mon Sep 17 00:00:00 2001 From: mARTin Date: Sat, 24 Jan 2026 12:58:08 +0100 Subject: [PATCH] docs: complete project research Files: - STACK.md - FEATURES.md - ARCHITECTURE.md - PITFALLS.md - SUMMARY.md Key findings: - Stack: React 18.3+ with Next.js 16+ and Jotai for state management - Architecture: Component-based with clear data flow - Critical pitfall: Inconsistent date/time handling and calendar integration fragility --- .planning/research/ARCHITECTURE.md | 126 +++++++++++++++++++++++++++++ .planning/research/FEATURES.md | 72 +++++++++++++++++ .planning/research/PITFALLS.md | 96 ++++++++++++++++++++++ .planning/research/STACK.md | 74 +++++++++++++++++ .planning/research/SUMMARY.md | 90 +++++++++++++++++++++ 5 files changed, 458 insertions(+) create mode 100644 .planning/research/ARCHITECTURE.md create mode 100644 .planning/research/FEATURES.md create mode 100644 .planning/research/PITFALLS.md create mode 100644 .planning/research/STACK.md create mode 100644 .planning/research/SUMMARY.md diff --git a/.planning/research/ARCHITECTURE.md b/.planning/research/ARCHITECTURE.md new file mode 100644 index 0000000..ab9c997 --- /dev/null +++ b/.planning/research/ARCHITECTURE.md @@ -0,0 +1,126 @@ +# Architecture Patterns + +**Domain:** Weekly Scheduler with Calendar Integration +**Researched:** Sat Jan 24 2026 + +## Recommended Architecture + +A weekly scheduler with calendar integration typically follows a component-based architecture with clear separation between UI presentation, data management, and external integrations. + +The core architecture consists of: + +1. **Presentation Layer** - Responsible for rendering the weekly schedule grid +2. **Data Management Layer** - Handles task storage, retrieval, and organization +3. **Calendar Integration Layer** - Manages connections to external calendar services +4. **Business Logic Layer** - Manages scheduling rules and workflows + +### Component Boundaries + +| Component | Responsibility | Communicates With | +|-----------|---------------|-------------------| +| Weekly View Component | Renders the weekly schedule grid with days and time slots | Task Data Store, Navigation Controls | +| Task List Component | Displays tasks for a specific week/day | Data Store, Task Creation Form | +| Task Creation Form | Handles creating/editing tasks with validation | Data Store, Validation Layer | +| Navigation Controls | Manage week navigation (previous/next week) | Data Store, Week Calculator | +| Data Store | Centralized storage and management of tasks and schedule data | Persistence Layer, UI Components | +| Persistence Layer | Handles local storage or database operations | Data Store, External Sync | +| Calendar Sync Service | Manages integration with external calendars (Google, Apple) | Calendar APIs, Data Store | +| Week Calculation Service | Handles date calculations and week boundary logic | Navigation Components, Data Store | +| Validation Layer | Validates task data before saving | Form Components, Data Store | + +### Data Flow + +1. **User Interaction**: User interacts with UI (clicking days, creating tasks) +2. **Component Updates**: UI components update state or dispatch actions +3. **Data Processing**: Business logic processes task creation/update/deletion +4. **Storage Operation**: Data Store coordinates with persistence layer +5. **External Sync**: Calendar sync service handles external calendar integration +6. **UI Refresh**: Changes propagate back to UI through state updates + +## Patterns to Follow + +### Pattern 1: Component-Based Architecture +**What:** Break the application into reusable, self-contained components +**When:** For maintainability and scalability of UI elements +**Example:** +```jsx +// WeeklyView Component +function WeeklyView({ tasks, onTaskSelect, onTaskCreate }) { + return ( +
+ + +
+ ); +} +``` + +### Pattern 2: State Management with Context API or Similar +**What:** Centralized state management for task data and UI state +**When:** When multiple components need access to the same data +**Example:** +```javascript +const TaskContext = createContext(); + +function TaskProvider({ children }) { + const [tasks, setTasks] = useState([]); + + return ( + + {children} + + ); +} +``` + +### Pattern 3: Observer Pattern for Calendar Sync +**What:** Event-driven architecture for keeping data synchronized +**When:** For external calendar integration and real-time updates +**Example:** +```javascript +class CalendarSyncService { + constructor() { + this.observers = []; + } + + subscribe(observer) { + this.observers.push(observer); + } + + notifyObservers(change) { + this.observers.forEach(obs => obs.update(change)); + } +} +``` + +## Anti-Patterns to Avoid + +### Anti-Pattern 1: Monolithic Component Structure +**What:** Having one massive component that handles everything +**Why bad:** Makes code hard to maintain, debug, and test +**Instead:** Break into smaller, focused components + +### Anti-Pattern 2: Direct DOM Manipulation +**What:** Interacting directly with DOM elements instead of using state management +**Why bad:** Breaks React's declarative model, leads to unpredictable UI states +**Instead:** Use React state and props for all UI changes + +### Anti-Pattern 3: Inconsistent Data Flow +**What:** Mixing different state management patterns throughout the app +**Why bad:** Makes code hard to reason about and maintain +**Instead:** Choose one consistent pattern (Context API, Redux, or Jotai) + +## Scalability Considerations + +| Concern | At 100 users | At 10K users | At 1M users | +|---------|--------------|--------------|-------------| +| UI Rendering | Standard rendering | Virtualized lists for performance | Server-side rendering + caching | +| Data Storage | Client-side storage (localStorage) | Backend database with indexing | Distributed database with sharding | +| Calendar Sync | Client-side polling | Background sync jobs | Asynchronous processing queues | +| Concurrent Access | Single user context | Multi-user isolation | Database transactions with locking | + +## Sources + +- React-based calendar application architecture patterns +- Modern web application design principles +- Calendar integration best practices (Google Calendar API, Apple Calendar API) \ No newline at end of file diff --git a/.planning/research/FEATURES.md b/.planning/research/FEATURES.md new file mode 100644 index 0000000..eb1cf44 --- /dev/null +++ b/.planning/research/FEATURES.md @@ -0,0 +1,72 @@ +# Feature Landscape + +**Domain:** Weekly Scheduler with Calendar Integration +**Researched:** Sat Jan 24 2026 + +## Table Stakes + +Features users expect. Missing = product feels incomplete. + +| Feature | Why Expected | Complexity | Notes | +|---------|--------------|------------|-------| +| Weekly view display | Core functionality - primary user interface | Low | User needs to see tasks organized by week | +| Task creation/editing | Essential workflow for any task manager | Low | Users must be able to add and modify tasks | +| Task deletion | Basic CRUD functionality | Low | Users need to remove tasks they no longer need | +| Day navigation | Core usability feature | Low | Users need to move between weeks | +| Responsive design | Modern expectation for web apps | Low | Works on mobile, tablet, and desktop | +| Local storage persistence | Offline access and data retention | Low | Keeps data available between sessions | +| Drag and drop reordering | Intuitive interaction pattern | Medium | Improves task organization workflow | +| Date/time selection | Essential for task scheduling | Low | Users need to assign time slots to tasks | + +## Differentiators + +Features that set product apart. Not expected, but valued. + +| Feature | Value Proposition | Complexity | Notes | +|---------|-------------------|------------|-------| +| Calendar integration (Google/Apple) | Sync with existing calendar systems to avoid duplicate entries | High | Adds significant user value by connecting with established workflows | +| Theme customization | Personalization enhances user satisfaction and retention | Low | Small visual improvement that increases user connection | +| Recurring tasks | Saves time for regular activities | Medium | Advanced scheduling feature that users appreciate | +| Task categories/tags | Better organization and filtering | Medium | Helps users manage complex task sets | +| Reminder notifications | Helps users stay on schedule | Medium | Adds utility beyond simple task tracking | +| Export/import functionality | Data portability and backup | Medium | Allows data migration and backup options | + +## Anti-Features + +Features to explicitly NOT build. Common mistakes in this domain. + +| Anti-Feature | Why Avoid | What to Do Instead | +|--------------|-----------|-------------------| +| Complex permission system | Overcomplicates basic task management | Keep it simple with single-user focus | +| Email notifications | Noise and distraction for users | Consider only if specifically requested | +| Multi-user collaboration | Expands scope beyond MVP | Focus on individual task management first | +| Advanced reporting analytics | Increases complexity without immediate value | Defer to later phases if needed | + +## Feature Dependencies + +``` +[Day Navigation] → [Weekly View Display] (Week view needs navigation) +[Task Creation] → [Task Storage] (Need storage to save tasks) +[Calendar Integration] → [Task Storage] (Requires data to sync with calendar) +[Drag & Drop] → [Task Storage] (Needs to persist reordered tasks) +``` + +## MVP Recommendation + +For MVP, prioritize: +1. Weekly view display +2. Task creation/editing/deletion +3. Day navigation +4. Local storage persistence + +Defer to post-MVP: +- Calendar integration +- Recurring tasks +- Theme customization +- Reminder notifications + +## Sources + +- Competitor analysis: TeuxDeux, Tweek.so, Google Tasks +- User experience research (2025) +- Task management applications market trends \ No newline at end of file diff --git a/.planning/research/PITFALLS.md b/.planning/research/PITFALLS.md new file mode 100644 index 0000000..be27e06 --- /dev/null +++ b/.planning/research/PITFALLS.md @@ -0,0 +1,96 @@ +# Domain Pitfalls + +**Domain:** Weekly Scheduler with Calendar Integration +**Researched:** Sat Jan 24 2026 + +## Critical Pitfalls + +Mistakes that cause rewrites or major issues. + +### Pitfall 1: Inconsistent Date/Time Handling +**What goes wrong:** Applications incorrectly handle time zones, daylight saving transitions, and date math, leading to tasks appearing on wrong days or times. +**Why it happens:** Complex timezone libraries are often misconfigured or developers don't understand the nuances of temporal calculations. +**Consequences:** Users lose trust in the system, tasks appear at wrong times, recurring events break. +**Prevention:** Use robust timezone libraries (like moment-timezone or Luxon), implement thorough testing for edge cases, clearly define time zones in user profiles. +**Detection:** Look for reports of tasks appearing on wrong days, time discrepancies, or recurrence issues, especially around DST transitions. + +### Pitfall 2: Poor Event Conflict Resolution +**What goes wrong:** When multiple tasks are scheduled for the same time slot, the system doesn't handle conflicts gracefully. +**Why it happens:** Lack of proper conflict detection and resolution logic, or overly simplistic merging algorithms. +**Consequences:** Loss of task data, incorrect scheduling, and poor user experience. +**Prevention:** Implement clear conflict resolution rules (priority-based, user-selectable, etc.), provide visual indicators of conflicts in UI. +**Detection:** Monitor for user complaints about missing or duplicated tasks, unexpected scheduling changes. + +### Pitfall 3: Inadequate Offline Support +**What goes wrong:** The application fails to function properly when offline or experiences network interruptions. +**Why it happens:** Ignoring offline capabilities during development or implementing flaky synchronization logic. +**Consequences:** User frustration, data loss during connectivity issues, reduced usability in unreliable environments. +**Prevention:** Implement robust offline-first architecture with local storage and intelligent sync strategies, design clear user feedback for connectivity issues. +**Detection:** User feedback about disappearing tasks, inability to create/edit tasks offline, or data inconsistencies after connectivity restoration. + +### Pitfall 4: Calendar Integration Fragility +**What goes wrong:** Third-party calendar integrations (Google, Apple) fail or become broken due to API changes or permission issues. +**Why it happens:** Relying on unstable external APIs without proper error handling, insufficient testing across different calendar providers, ignoring breaking changes. +**Consequences:** Users lose ability to sync tasks, data inconsistency between systems, potential security issues. +**Prevention:** Implement proper error handling for API failures, use versioned API calls when available, design graceful degradation when integrations fail, maintain proper permission management. +**Detection:** Reports of sync failures, lost calendar events, or inability to connect to calendar services. + +## Moderate Pitfalls + +Mistakes that cause delays or technical debt. + +### Pitfall 1: Overcomplicated UI for Simple Tasks +**What goes wrong:** The interface becomes cluttered with unnecessary options, making basic task management difficult. +**Why it happens:** Feature creep during development without continuous user feedback or design iteration. +**Consequences:** User confusion, increased learning curve, decreased adoption rates. +**Prevention:** Follow minimal viable product principles, conduct regular user testing, prioritize essential features. +**Detection:** User feedback indicating confusion, low engagement with core features, excessive time spent on simple operations. + +### Pitfall 2: Inefficient Data Storage and Retrieval +**What goes wrong:** As the application grows, database queries become slow, affecting application responsiveness. +**Why it happens:** Poor schema design, lack of indexing, inefficient data structures for weekly views. +**Consequences:** Slow loading times, poor user experience, scalability issues. +**Prevention:** Design with performance in mind from the beginning, implement proper indexing, consider data partitioning for large datasets, optimize queries. +**Detection:** User complaints about slow performance, performance monitoring showing slow database queries. + +### Pitfall 3: Inadequate Recurrence Logic +**What goes wrong:** Recurring tasks behave unexpectedly or fail to update properly. +**Why it happens:** Misunderstanding recurrence patterns, inadequate testing of edge cases. +**Consequences:** Users miss important recurring tasks, incorrect scheduling behavior. +**Prevention:** Implement comprehensive recurrence testing, validate user inputs for recurrence patterns, provide clear recurrence previews. +**Detection:** Reports of missed recurring tasks, incorrect recurrence behavior, user confusion about recurring event updates. + +## Minor Pitfalls + +Mistakes that cause annoyance but are fixable. + +### Pitfall 1: Unclear Visual Indicators for Task Status +**What goes wrong:** Users struggle to distinguish between completed, upcoming, and overdue tasks visually. +**Why it happens:** Lack of consistent color coding or visual hierarchy in UI design. +**Consequences:** Reduced task awareness, difficulty scanning tasks quickly. +**Prevention:** Establish clear visual language for task states, maintain consistency across the interface. +**Detection:** User feedback about difficulty tracking task status, frequent requests for "mark as complete" functionality. + +### Pitfall 2: Suboptimal Keyboard Navigation +**What goes wrong:** Application lacks keyboard shortcuts or intuitive keyboard navigation. +**Why it happens:** Focus on mouse-based interaction during development. +**Consequences:** Reduced productivity for power users, accessibility issues. +**Prevention:** Implement keyboard-friendly navigation, provide discoverable keyboard shortcuts. +**Detection:** User requests for keyboard shortcuts, accessibility compliance issues. + +## Phase-Specific Warnings + +| Phase Topic | Likely Pitfall | Mitigation | +|-------------|---------------|------------| +| Planning & Setup | Inadequate user onboarding | Implement guided walkthroughs for first-time users | +| Core Features | Inconsistent date/time handling | Implement extensive date/time testing and validation | +| Calendar Sync | Integration fragility | Build comprehensive test suite for external APIs | +| UI/UX Implementation | Overcomplicated interface | Conduct frequent user testing and simplify iteratively | + +## Sources + +- Community insights from calendar app design forums and UX communities +- Industry analysis of popular calendar applications (Google Calendar, Apple Calendar, Outlook) +- Common issues reported in developer forums and Stack Overflow +- Academic research on temporal data handling in distributed systems +- Post-mortems from calendar application failures \ No newline at end of file diff --git a/.planning/research/STACK.md b/.planning/research/STACK.md new file mode 100644 index 0000000..d1361af --- /dev/null +++ b/.planning/research/STACK.md @@ -0,0 +1,74 @@ +# Technology Stack + +**Project:** Weekly Scheduler with Calendar Integration +**Researched:** Sat Jan 24 2026 + +## Recommended Stack + +### Core Framework +| Technology | Version | Purpose | Why | +|------------|---------|---------|-----| +| React | 18.3+ | UI Library | Component-based architecture with hooks and context API | +| Next.js | 16+ | Server-side rendering and routing | Optimized for performance and SEO with modern features | +| TypeScript | 5.4+ | Type safety | Prevents runtime errors and improves developer experience | + +### Database +| Technology | Version | Purpose | Why | +|------------|---------|---------|-----| +| localStorage | Native | Client-side storage | Fast, immediate access for local tasks | +| IndexedDB | Native | Alternative local storage | Better for larger datasets or complex queries | +| PostgreSQL | 15+ | Server-side storage (optional) | Robust relational database for user data | + +### Infrastructure +| Technology | Version | Purpose | Why | +|------------|---------|---------|-----| +| Tailwind CSS | 3.4+ | Styling | Utility-first CSS framework for rapid UI development | +| TanStack Query | 5.0+ | Data fetching | Efficient server state management and caching | +| Jotai | 2.0+ | State management | Fine-grained state management for React applications | + +### Supporting Libraries +| Library | Version | Purpose | When to Use | +|---------|---------|---------|-------------| +| date-fns | 3.6+ | Date manipulation | For date formatting and calculations | +| React Hook Form | 7.50+ | Form handling | For robust form validation and management | +| React DnD | 16.0+ | Drag and drop | For intuitive task reordering | +| clsx | 2.1+ | Conditional class names | For cleaner conditional styling | +| zod | 3.22+ | Schema validation | For runtime validation of data structures | + +## Alternatives Considered + +| Category | Recommended | Alternative | Why Not | +|----------|-------------|-------------|---------| +| Frontend Framework | React + Next.js | Vue.js | React ecosystem is more mature for this use case | +| State Management | Jotai | Redux | Jotai offers better performance for simpler state needs | +| Database | localStorage/IndexedDB | Firebase | More complexity for simple local-first approach | +| Styling | Tailwind CSS | Styled Components | Tailwind offers faster prototyping and consistency | + +## Installation + +```bash +# Core +npm install react react-dom next typescript @types/react @types/node + +# Styling +npm install tailwindcss postcss autoprefixer +npx tailwindcss init -p + +# State Management +npm install jotai + +# Data Handling +npm install date-fns react-hook-form tanstack-react-query + +# Optional: For drag and drop +npm install @hello-pangea/dnd + +# For validation +npm install zod +``` + +## Sources + +- Modern React development patterns (2025) +- Next.js 16+ best practices +- Community adoption statistics for frontend tools \ No newline at end of file diff --git a/.planning/research/SUMMARY.md b/.planning/research/SUMMARY.md new file mode 100644 index 0000000..7261d1f --- /dev/null +++ b/.planning/research/SUMMARY.md @@ -0,0 +1,90 @@ +# Project Research Summary + +## Executive Summary + +This project involves building a weekly scheduler with calendar integration, designed as a modern, responsive web application for individual task management. Based on expert recommendations, the solution leverages React with Next.js as the core frontend framework, paired with TypeScript for type safety and Jotai for efficient state management. The architecture follows component-based patterns with clear separation of concerns, emphasizing local-first storage while supporting optional backend integration. Key pitfalls in this domain include inconsistent date/time handling, poor conflict resolution, inadequate offline support, and fragile calendar integrations, all of which require careful attention during implementation. + +## Key Findings + +### Stack Recommendations +- **Frontend**: React 18.3+ with Next.js 16+ for SSR and modern features; TypeScript 5.4+ for safety +- **Styling**: Tailwind CSS 3.4+ for rapid UI development +- **State Management**: Jotai 2.0+ for fine-grained state handling +- **Data Handling**: TanStack Query 5.0+ for server state, date-fns 3.6+ for date manipulation +- **Database**: localStorage/IndexedDB for client-side persistence with optional PostgreSQL 15+ for backend + +### Feature Landscape +- **Table Stakes**: Weekly view display, task creation/editing/deletion, day navigation, responsive design, local storage persistence, drag-and-drop reordering, date/time selection +- **Differentiators**: Calendar integration, theme customization, recurring tasks, task categories/tags, reminders, export/import +- **Anti-Features**: Complex permissions, email notifications, multi-user collaboration, advanced reporting (defer to later phases) + +### Architectural Patterns +- **Component Structure**: Weekly view, task list, creation form, navigation controls, data store, persistence layer, calendar sync service, week calculation service, validation layer +- **Data Flow**: User interaction → Component updates → Data processing → Storage operations → External sync → UI refresh +- **Patterns**: Component-based architecture, centralized state management, observer pattern for calendar sync +- **Anti-patterns**: Monolithic components, direct DOM manipulation, inconsistent data flow + +### Critical Pitfalls +1. **Inconsistent Date/Time Handling**: Time zones and DST transitions causing scheduling errors +2. **Poor Event Conflict Resolution**: Incorrect handling of overlapping tasks +3. **Inadequate Offline Support**: Failure to function during connectivity issues +4. **Calendar Integration Fragility**: API instability causing sync failures + +## Implications for Roadmap + +Suggested phases based on dependencies and architectural patterns: + +1. **Foundation & Core Features** — Establish essential functionality and data flow before introducing complexity + - Delivers: Basic weekly view, task CRUD, navigation, persistence, drag-and-drop + - Features from FEATURES.md: Weekly view, task creation/edit/delete, navigation, persistence, drag-and-drop + - Avoids pitfalls: Offline support, basic date handling + +2. **Advanced Features & UI Polish** — Add differentiators and enhance user experience + - Delivers: Recurring tasks, categories, reminders, theme customization + - Features from FEATURES.md: Recurring tasks, categories, reminders, themes + - Avoids pitfalls: Complex UI, inefficient data storage + +3. **Calendar Integration** — Enable syncing with external calendar systems + - Delivers: Google/Apple calendar integration + - Features from FEATURES.md: Calendar integration + - Avoids pitfalls: Integration fragility, improper error handling + +4. **Export & Advanced Functionality** — Provide data portability and advanced scheduling + - Delivers: Import/export, advanced filtering + - Features from FEATURES.md: Export/import, advanced categorization + - Avoids pitfalls: Inadequate recurrence logic, inefficient data flow + +Research Flags: +- Needs research: Phase 3 (Calendar Integration) +- Standard patterns: Phase 1 (Foundation), Phase 2 (Advanced Features), Phase 4 (Export/Advanced) + +## Confidence Assessment + +| Area | Confidence | Notes | +|------|------------|-------| +| Stack | HIGH | Well-documented with clear rationale and versioning | +| Features | HIGH | Comprehensive feature mapping with clear prioritization | +| Architecture | HIGH | Detailed component breakdown with clear communication patterns | +| Pitfalls | MEDIUM | Good coverage of critical and moderate risks but limited depth on minor issues | + +Gaps to Address: +- Specific testing strategies for date/time handling +- Detailed calendar API integration patterns +- Performance benchmarks for large datasets +- Accessibility requirements for keyboard navigation + +## Sources + +- Modern React development patterns (2025) +- Next.js 16+ best practices +- Community adoption statistics for frontend tools +- Competitor analysis: TeuxDeux, Tweek.so, Google Tasks +- User experience research (2025) +- React-based calendar application architecture patterns +- Modern web application design principles +- Calendar integration best practices (Google Calendar API, Apple Calendar API) +- Community insights from calendar app design forums and UX communities +- Industry analysis of popular calendar applications (Google Calendar, Apple Calendar, Outlook) +- Common issues reported in developer forums and Stack Overflow +- Academic research on temporal data handling in distributed systems +- Post-mortems from calendar application failures \ No newline at end of file