# GitLog — Plan de portage — Phase 6 — **COMPLETED**

> Fait partie de la spécification [GitLog — Port de @tomplum/react-git-log vers Vue 3](./1-contexte.md)
> Document principal : [Plan de portage — Index](./4-plan-index.md)

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### Phase 6 : Module Tags

#### Phase 6.1 : Icônes SVG et utilitaires

**Entrée** : `assets/` (icônes SVG), `modules/Tags/utils/formatBranch.ts`
**Sortie** : `assets/` copiés, `formatBranch.ts` déjà copié en phase 1.4

- Copier les fichiers SVG manquants : `branch.svg`, `git.svg`, `merge.svg`, `tag.svg` dans `assets/`. Les fichiers `minus.svg`, `pencil.svg`, `plus.svg` sont **déjà en place** (copiés en phase 5.2 pour `IndexStatus`).
- Vérifier que `formatBranch.ts` est bien en place (phase 1.4) — il est dans `utils/formatBranch.ts` (import direct : `../utils/formatBranch`, pas de barrel `utils/index.ts`)
- **Note sur l'import SVG** : Deux approches distinctes selon le SVG (cf [review d'impact phase 5, point #2](./review-impact-phases-5.md#2-svg-importes-comme-urls-avec-img----acceptable-pour-phase-5-incompatible-pour-phase-6)) :
  - **`branch.svg`, `tag.svg`, `git.svg`** : Ces SVGs utilisent `fill="currentColor"` ou `stroke="currentColor"` et sont colorés dynamiquement dans le code React source (via `fill: textColour` / `stroke: textColour` en inline style). Ils doivent être **inlinés directement dans le `<template>`** de leurs composants Vue respectifs (`BranchIcon.vue`, `TagIcon.vue`, `GitIcon.vue`). Un `<img>` ne permet pas de modifier le `fill`/`stroke` interne d'un SVG. Les fichiers SVG source servent de référence mais le contenu SVG est copié dans le template du composant.
  - **`pencil.svg`, `plus.svg`, `minus.svg`** : Ont des couleurs hardcodées et ne nécessitent pas de coloration dynamique. Ils restent importés comme URLs et rendus via `<img>` (approche déjà en place depuis la phase 5).
  - Le nombre d'instances de ces icônes en page est faible (3 à 9 sur 50 commits, uniquement sur les branch tips, tags et index). L'inline SVG ne pose aucun problème de performance.

**Critère de validation** : Les SVG à coloration dynamique (`branch.svg`, `tag.svg`, `git.svg`) sont rendus inline dans le template et acceptent une coloration via props/styles. `formatBranch` fonctionne.

#### Phase 6.2 : GitLogTags.vue et sous-composants

**Entrée** : `modules/Tags/Tags.tsx`, `modules/Tags/components/` (BranchTag, BranchTagTooltip, BranchLabel, TagLabel, BranchIcon, TagIcon, GitIcon, IndexLabel, Link) + SCSS
**Sortie** : `tags/GitLogTags.vue`, `tags/components/` + SCSS

- `GitLogTags.vue` : Colonne de gauche. Itère sur les commits visibles. Pour chaque commit qui est un branch tip ou a un tag, affiche un `BranchTag`.
- `BranchTag.vue` : Badge compact avec icône (branche ou tag) + label. Tooltip au hover via positionnement CSS (même approche que `CommitNode` en phase 4.6, avec positionnement à droite au lieu de top/bottom).
- `BranchLabel.vue` : Texte formaté du nom de branche (via `formatBranch`).
- `TagLabel.vue` : Texte formaté du nom de tag.
- `BranchIcon.vue`, `TagIcon.vue`, `GitIcon.vue` : Composants d'icônes SVG.
- `IndexLabel.vue` : Label spécial pour le pseudo-commit index.
- `Link.vue` : Lien optionnel vers le provider git distant (utilise la prop `urls`).
- `BranchTagTooltip.vue` : Contenu du tooltip affiché au survol d'un badge de branche/tag.

**Critère de validation** : Les tags/branches s'affichent à côté des bons commits. Les icônes sont visibles. Le tooltip fonctionne.

---

## Tasks tracking

- [x] Phase 6.1 : Icônes SVG et utilitaires
- [x] Phase 6.2 : GitLogTags.vue et sous-composants

## Decisions made during implementation
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### Phase 6.1

1. **Icon components use `useTheme()` internally instead of a color prop**: The React source components (`BranchIcon`, `TagIcon`, `GitIcon`) all consume `useTheme()` internally to get `textColour` and `shiftAlphaChannel`. The Vue components follow the same pattern — they do not accept a color prop. The color is determined by the theme context, consistent with the React source behavior.

2. **SVG files copied to `assets/` as reference**: All 4 missing SVGs (`branch.svg`, `tag.svg`, `git.svg`, `merge.svg`) were copied to `assets/`. For `branch.svg`, `tag.svg`, and `git.svg`, the SVG content is inlined in the Vue component templates (as mandated by the review d'impact). The files in `assets/` serve as reference only. `merge.svg` is kept in `assets/` for potential future use.

3. **Vue class fallthrough for parent styling**: The React components accept a `className` prop that gets merged with the component's internal class via `classNames()`. In the Vue components, Vue's automatic attribute fallthrough on the root `<svg>` element handles this — parent components can pass `:class="styles.icon"` and it merges with the component's internal `:class="styles.icon"` automatically. No explicit `class` prop needed.

4. **No `data-testid` attributes**: Per project decision (review d'impact phase 5, point #4), `data-testid` attributes are not added to these components. The `id` attributes are kept (e.g., `id="branch-icon"`) as they were present in the React source.

### Phase 6.2

1. **`graphOrientation` added to `GitContextBag`**: The React source stores `graphOrientation` in `GitContext` (set by `GitLogCore` as state). The Vue port had it only in `GraphContextBag`, but `Tags` is a sibling of `Graph` (not a descendant), so it cannot access `GraphContextBag`. To match the React source pattern, `graphOrientation` and `setGraphOrientation` were added to `GitContextBag`. `GitLog.vue` provides a default of `'normal'`, and `GraphCore.vue` uses `watchEffect` to sync its `orientation` prop to the shared `GitContext`. This is architecturally the same as the `graphWidth`/`setGraphWidth` pattern already in the codebase.

2. **CSS-based tooltip instead of `react-tiny-popover`**: Following the same approach as `CommitNode.vue` (Phase 4.6), the `BranchTag` tooltip uses CSS absolute positioning. The tooltip is positioned to the right of the tag badge (`left: 100%; top: 50%; transform: translateY(-50%)`), matching the React source's `positions='right'` Popover configuration. No arrow/pointer is rendered (the React source's `ArrowContainer` is not reproduced, consistent with the CommitNode tooltip approach).

3. **`Link.vue` uses `linkClass` prop instead of Vue class fallthrough**: The React `Link` component accepts a `className` prop merged via `classNames()`. The Vue `Link.vue` uses a `linkClass` prop instead of relying on Vue's attribute fallthrough, because the `<a>` element already has its own `:class` binding (combining the base `.link` class with the parent-provided class). Using a dedicated prop makes the merge explicit.

4. **No `data-testid` attributes**: Per project decision (review d'impact phase 5, point #4), `data-testid` attributes are not added to any of the Phase 6.2 components.

5. **React SCSS bug in `IndexLabel.module.scss`**: The React source `IndexLabel.tsx` references `styles.indexLabel` but its SCSS file defines `.branchName` instead. This is a bug in the React source. The Vue `IndexLabel.module.scss` uses `.indexLabel` to match the component code reference.

6. **`BranchTag` line positioning uses pixel values**: The React source passes `lineRight` and `lineWidth` as numbers to inline styles. In Vue, CSS `right` and `width` properties require units, so the values are interpolated with `px` suffix (`right: ${lineRight}px`, `width: ${lineWidth}px`).

7. **Tags filtering matches React source**: Like the React `Tags.tsx`, `GitLogTags.vue` applies the `filter` on the paginated commits (after slicing by `paging.startIndex/endIndex`). This is the "triple filtering" behavior documented in the architecture spec (point 3 of the triple filtering).

## Resolved questions and doubts
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### Phase 6.1

1. **Should icon components accept a color prop or use useTheme() internally?** — Resolved: use `useTheme()` internally, matching the React source. The parent components (`BranchLabel`, `TagLabel`, `IndexLabel`) never pass a color to the icons — the icons determine their own color from the theme context.

### Phase 6.2

1. **How should Tags access `graphOrientation` without being nested inside GraphCore?** — Resolved: added `graphOrientation` and `setGraphOrientation` to `GitContextBag` (the shared context accessible by all modules). `GraphCore.vue` syncs its `orientation` prop to the shared context via `watchEffect`. This matches the React source architecture where `graphOrientation` is part of `GitContext`.

2. **Should the tooltip use the same CSS positioning approach as CommitNode or reproduce the Popover library?** — Resolved: use the same CSS-based approach as `CommitNode.vue`, with positioning adapted to the right side instead of top/bottom. The CSS is simpler and avoids any third-party dependency.

3. **How should `Link.vue` handle the parent-provided class?** — Resolved: use a `linkClass` prop rather than Vue attribute fallthrough. The component already binds its own `.link` class on the root `<a>` element, so a dedicated prop makes the class merge explicit via the array syntax `[styles.link, linkClass]`.
