# Epic: version control

# Current
[Reports Table](https://github.com/NASA-IMPACT/snwg-backend/blob/develop/app/db/models.py#L22-L41)
[ReportVersions Table](https://github.com/NASA-IMPACT/snwg-backend/blob/develop/app/db/models.py#L54-L98)

Reports:
    id: Int(primary_key, index, autoincrement)
    title: String
    alias: String(unique)
    created_by: String
    created_at: DateTime
    last_updated_by: String
    last_updated_at: DateTime
    versions: relationship(ReportVersions)

ReportVersions:
    report_id: Int(primary_key, index)
    major: Int(primary_key) // this is static right now in SNWG
    minor: Int // this is static right now in SNWG

    // Never updated
    created_by: String
    created_at: DateTime

    // Snapshot not required fields
    // -- Normal fields
    owner: String
    authors: [String]
    reviewers: [JSON]
    locked_by: String
    published_by: String
    published_at: DateTime
    threads: [threads]
    // -- Auto generated values fields
    searchable: TSVECTOR
    last_updated_by: String
    last_updated_at: DateTime
    status: String

    // *** Fields to save for version control ***
    journal_status: String
    keywords: [JSON]
    doi: String
    document: JSON
    citation: JSON
    publication_checklist: JSON
    sections_completed: JSON

# New

## Back-end

### Add New table `ReportVersionSnapshots`

ReportVersionSnapshots:
    id: Int(primary, index)
    // Report version id
    report_id: Int(index)
    major: Int

    // Metadata
    created_by: String
    created_at: DateTime
    changelog: String(Text)

    // Snapshot data
    journal_status: String
    keywords: [JSON]
    doi: String
    document: JSON
    citation: JSON
    publication_checklist: JSON
    sections_completed: JSON

### Add new endpoints
- GET `/reports/{report_id}/versions/{version}/snapshots`
- Permission check (same as GET `/reports`)
- List `ReportVersionSnapshots` Summary

        ReportVersionSnapshotSummaryOutput:
            id: Int
            created_by: String
            created_at: DateTime
            changelog: String(Text)

- GET `/reports/{report_id}/versions/{version}/snapshots/{snapshot_id}`
- Permission check (same as GET `/reports`)
- Retrieve `ReportVersionSnapshots` Detail

### Modify endpoints
- POST `/reports`
- Create `ReportVersionSnapshots` using latest `ReportVersions`
- POST `/reports/{report_id}`
- Create `ReportVersionSnapshots` using latest `ReportVersions`

## Front-end
- List snapshots by ReportVersion
- Retrieve snapshot
- Fill edit form for ReportVersion using snapshot
- User can modify if needed
- User can save ReportVersion
- Generate new snapshot