Johan Dahlin
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199 lines
4.2 KiB
Markdown
199 lines
4.2 KiB
Markdown
# Technical App Structure (Backend-First)
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This document summarizes the **final agreed app structure** and their **core models**, focusing on **conceptual correctness and storage**, not UX.
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The system is a **modular monolith**. Apps are namespaces, not microservices.
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---
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## 1. `core`
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**Purpose:** global structure and lightweight organization.
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### Models
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- `Course`
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- code
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- name
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- term / year (optional)
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- metadata (optional)
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### Notes
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- `Course` is a **scope/container**, not a source and not knowledge.
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- It groups sources, notes, exercises, and exams.
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- Keep this model dumb.
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---
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## 2. `sources` (a.k.a. *källor*)
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**Purpose:** external, replaceable, evidence-based material.
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Everything here is:
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- not authored by you
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- safe to delete and regenerate
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- traceable to an origin
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### Models
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- `Source`
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- type (slides, målbeskrivning, instudieringsfrågor, youtube, external_notes, web)
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- title
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- url / origin reference
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- course (FK)
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- metadata
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- `Asset`
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- file/blob reference (PDF, images, transcript file)
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- kind (original, page_image, transcript, extracted_text)
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- `TextUnit`
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- extracted text segment
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- locator (page number, timestamp, slide index)
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- confidence / OCR quality (optional)
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- `Summary`
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- AI or human summary
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- scope (whole source, section, page range)
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- locator range
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### Rules
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- OCR output → `TextUnit`
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- Video transcripts → `TextUnit`
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- Other people’s notes → `Source` + `TextUnit`
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- AI summaries stay here until rewritten by you
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---
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## 3. `notes`
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**Purpose:** your authored understanding in Markdown (incremental writing).
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Everything here is:
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- written or rewritten by you
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- mutable and refined over time
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- stable across re-imports of sources
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### Models
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- `Note`
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- title
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- body_md
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- course (FK)
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- `Chunk`
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- UUID anchor (explicit, stable)
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- excerpt_md
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- status (raw → rewritten → prompted → stable)
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- `Concept`
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- name
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- description_md
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- `ChunkSourceRef`
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- chunk → source link
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- locator (page/timestamp)
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### Rules
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- Nothing enters `notes` automatically.
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- Promotion from `sources` is always explicit.
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- Notes are the **driver of understanding**, not scheduling.
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---
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## 4. `exercises`
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**Purpose:** quizable, gradable units (what gets tested).
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Everything here:
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- has a prompt
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- expects an answer or rubric
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- can be graded
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- can be scheduled
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### Models
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- `Exercise`
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- type (MCQ, cloze, short_answer, free_text)
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- prompt_md
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- expected_answer / rubric / answer_key
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- `ExerciseChunkLink`
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- exercise ↔ chunk (why this exists)
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- `ExerciseSourceRef` (optional)
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- exercise ↔ source locator
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### Rules
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- Exactly **one canonical place** for testable units.
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- Exercises are created from notes, exams, or manually.
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- Exercises do **not** track attempts or scheduling.
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---
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## 5. `exams`
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**Purpose:** exam context and performance history.
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Everything here is:
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- session-based
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- append-only
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- about performance under constraints
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### Models
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- `Exam`
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- course (FK)
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- date
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- metadata
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- `ExamExercise`
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- join table (exam ↔ exercise)
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- order
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- `Attempt`
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- exam (FK)
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- mode (timed / untimed)
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- start / end timestamps
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- `Response`
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- attempt (FK)
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- exercise (FK)
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- answer
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- correct
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- time_spent
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- confidence
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### Rules
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- Exams **select** exercises; they don’t own them.
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- Exam results produce signals for reviews.
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---
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## 6. `reviews`
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**Purpose:** spaced repetition scheduling (FSRS).
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Everything here is:
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- content-agnostic
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- stateful
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- never auto-deleted
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### Models
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- `ReviewItem`
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- uid (stable across imports)
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- points to `Exercise`
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- deck / flags
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- `FsrsState`
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- stability
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- difficulty
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- due date
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- reps / lapses
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- `ReviewLog`
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- timestamp
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- rating (Again / Hard / Good / Easy)
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- elapsed / scheduled days
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### Rules
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- Scheduler never cares *why* an exercise exists.
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- Logs are append-only and must be preserved.
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---
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## Core Invariant (memorize this)
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Sources provide evidence.
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Notes explain.
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Exercises test.
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Exams contextualize.
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Reviews schedule.
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If something does not fit this sentence, it is in the wrong app.
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---
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## MVP Guidance
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- You can ship week 1 with:
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- `core`, `sources`, `notes`, `exercises`, `reviews`
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- `exams` can be layered on without schema breakage.
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- Avoid premature generalization (collections, curricula, sharing).
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End of document. |