Vera Grita | Pdf

| Goal | How the hub helps | |------|--------------------| | the PDF quickly | Prominent search result, deep‑link, QR code. | | Read it comfortably on any device | Responsive viewer with zoom, night‑mode, text‑to‑speech. | | Understand the content | AI‑driven summary, keyword extraction, translation, and Q&A. | | Collaborate around it | Inline comments, highlights, shareable annotations, export. | | Reuse the material | Download options (PDF, EPUB, plain‑text) and API endpoint for developers. |

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[Client (Web/Mobile)] | v +-------------------+ +-------------------+ | Front‑end SPA | <---> | Auth Service (JWT)| | (React/Vue/TS) | +-------------------+ +-------------------+ | v +-------------------+ +-------------------+ | API Gateway (NGINX) | Analytics (Amplitude) | +-------------------+ +-------------------+ | | v v +-------------------+ +-------------------+ | PDF Service | | Annotation DB | | (Node/Go) | | (PostgreSQL) | | - PDF.js | +-------------------+ | - OCR/Index (ES) | +-------------------+ | v +-------------------+ | AI Service Layer | | (OpenAI / Local) | +-------------------+ | v +-------------------+ | Storage (S3) | | - Original PDF | | - Page Tiles | | - Converted Files| +-------------------+

| Persona | Motivation | Primary Use Cases | |---------|------------|-------------------| | | Needs to cite and extract specific passages. | Search inside PDF, highlight, export citations. | | Educator | Wants to build lesson plans around the text. | Summarize chapters, create quizzes via AI, share annotated versions. | | Journalist / Blogger | Must verify quotes quickly. | Text‑to‑speech for fast listening, Q&A bot to locate statements. | | Accessibility Advocate | Requires a fully accessible reading experience. | Screen‑reader friendly viewer, high‑contrast mode, audio narration. | | Developer / Integrator | Wants to embed the PDF in other tools. | Public REST endpoint returning PDF metadata, embed iframe, SDK. | vera grita pdf

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| Category | Requirement | |----------|-------------| | | Initial PDF load < 2 s on 3G; subsequent page tiles < 300 ms. | | Scalability | Architecture is stateless; can be horizontally scaled behind a load balancer. | | Security | – All traffic HTTPS. – Input sanitisation for annotations/comments (prevent XSS). – Rate‑limit API (100 req/min). | | Reliability | 99.9 % uptime SLA on viewer & API (multi‑AZ deployment). | | Maintainability | Codebase follows the project’s linting/formatting standards; unit tests ≥ 80 % coverage for core services. | | Compliance | If the PDF is copyrighted, enforce DRM or access‑control according to the license. | | Goal | How the hub helps |

(Home page)

openapi: 3.0.3 info: title: Vera Grita PDF Hub API version: 1.0.0 servers: - url: https://api.example.com/v1 paths: /vera-grita: get: summary: Retrieve PDF metadata and download links responses: '200': description: Successful response content: application/json: schema: $ref: '#/components/schemas/DocumentMeta' /vera-grita/pages/page: get: summary: Get raster image (PNG) for a given page parameters: - name: page in: path required: true schema: type: integer minimum: 1 responses: '200': description: PNG image content: image/png: schema: type: string format: binary /vera-grita/text: get: summary: Get plain‑text representation (page‑by‑page) responses: '200': description: JSON array of pages content: application/json: schema: type: array | | Collaborate around it | Inline comments,