# Architecture Overview

How the intotheeast site hangs together.

---

## Stack

| Layer | Technology | Notes |
|---|---|---|
| CMS | Grav 2.0.7 stable | Flat-file PHP CMS; no database. Server upgrades in place via `bin/gpm self-upgrade` |
| Admin | Admin2 v2.0.12 | Plugin slug: `admin2` (not `admin`) |
| GPM channel | `stable` | Authoritative in `user/config/system.yaml` → `gpm.releases`; `GRAV_CHANNEL=production` in compose is cosmetic |
| Container | Docker (`getgrav/grav` base + custom `Dockerfile`) | Grav 2.0 baked in at build time |
| PHP session | `session.save_path = /tmp` | Set in `php/php-local.ini` |
| Dev URL | http://localhost:8081 | Mapped from container port 80 |
| Maps | MapLibre GL JS | Replaced Leaflet; one shared map path (`MapUtils.initEntryMap`) on trip + home |
| GPX rendering | toGeoJSON (bundled in `js/map.js`) | Parses GPX → GeoJSON route layers client-side; no CDN |

---

## Plugin roles

The posting pipeline is a chain of three plugins:

```
Browser POST /post
│
├─ Grav Form plugin (built-in)
│  └─ validates required fields; handles file uploads
│
├─ cache-on-save (custom) — onFormValidationProcessed, runs BEFORE the write
│  ├─ setData('parent', …) ← derived from site.active_trip
│  └─ sets pageconfig.overwrite_mode: edit when the hidden edit_path is filled,
│     false when empty (create a fresh dated folder)
│
├─ add-page-by-form (third-party, patched — see deploy/patches/)
│  └─ reads post-form.md config:
│     ├─ pageconfig.slug_field → slug from date + title
│     └─ pagefrontmatter → template: entry
│  └─ writes entry.md to user/pages/01.trips/<trip>/01.dailies/<slug>.entry/
│  └─ moves uploaded photos into the page folder
│
└─ cache-on-save (again, post-write)
   └─ calls $grav['cache']->deleteAll() on every new-entry form submission
   └─ ensures entries appear in feed immediately in both dev and prod mode
```

Other notable plugins:

| Plugin | Role |
|---|---|
| `login` | Auth for /post and /gpx-manager |
| `api` (Grav API v1) | Used by /gpx-manager to list/upload/delete GPX files |
| `admin2` | Admin panel at /admin |
| `story-blocks` (custom) | Storytelling shortcode blocks for long-form stories (needs `shortcode-core`) |
| `entry-actions` (custom) | Owner-only, active-trip-scoped journal entry actions (delete) via the Grav API |

### Plugin management model

Three categories, by how each plugin is installed and maintained:

1. **GPM-managed** (`plugins.txt` → `make install-plugins`): the marketplace plugins, including `login`, `form`, `admin2`, `api`, `flex-objects`, shortcodes, etc. As of the 2.0.4 upgrade, `admin2`/`api`/`flex-objects` moved into this category — they were previously hand-extracted from the core bundle. Update with `bin/gpm update` (`make remote-update-plugins-<env>` on servers).
2. **Custom, in-repo** (`user/plugins/` allowlisted in `user/.gitignore`): `cache-on-save`, `story-blocks`, `entry-actions`. Versioned in the user repo.
3. **Remote-only**: `git-sync` — installed and configured only on servers, **never** in `plugins.txt`, and disabled during upgrades.

---

## Template hierarchy

All page templates extend `base.html.twig`:

```
templates/
├─ base.html.twig          ← site shell: nav, fonts, CSS tokens
├─ default.html.twig       ← extends base; generic page
├─ home.html.twig          ← extends base; context-aware two-column layout
├─ trip.html.twig          ← extends base; trip page with filter bar (All/Journal/Stories)
├─ entry.html.twig         ← extends base; single journal entry (gallery, badges, map)
├─ story.html.twig         ← extends base; single story (Ken Burns hero, shortcodes)
└─ gpx-manager.html.twig   ← extends base; admin UI for GPX file management
```

The standalone `dailies.html.twig`, `map.html.twig`, `stats.html.twig` and `stories.html.twig` view templates were **removed** in the 2026-07-04 standalone-page cleanup — the trip page (`trip.html.twig`) consolidated the feed, inline map, and inline stats.

Partials live in `templates/partials/` (plus macros in `templates/macros/`). Key partials: `base.html.twig` (site shell extended by all page templates), `entry-map.html.twig` (shared map column + `initEntryMap` call, used by trip + home), `trip-feed-col.html.twig` (feed column chrome, shared by trip + home), `home-predeparture.html.twig`, `entry-journal.html.twig` / `entry-story.html.twig` (feed cards), `trip-publish-toggle.html.twig`, and `weather-icons.html.twig`.

### Shared partial contracts

Two partials are included by **both** `trip.html.twig` and the active branch of `home.html.twig`, via `{% include … with {…} only %}`. The `only` keyword means every value must be passed explicitly — the tables below are the contracts. The rules that govern them (single map path, required map globals, never hand-edit bundles) live in `CLAUDE.md`; these are the parameter details.

#### `entry-map.html.twig`

Renders the `.home-map-col` column (map div `#{{ map_id }}` + fullscreen button) and, when `entries` is non-empty, a thin `<script>` assigning `window.{{ map_global }}` from `initEntryMap`. Callers resolve header values (use_gpx / autoconnect) and pass them in.

| Parameter | Type | Trip passes | Home passes |
|---|---|---|---|
| `map_id` | string | `'trip-map'` | `'home-map'` |
| `map_global` | string | `'tripMap'` | `'homeMap'` |
| `entries` | array | `[{lat, lng, slug, title, url, type?, force_connect, ...}]` | same |
| `card_prefix` | string | `'entry-'` | `'entry-'` |
| `story_markers` | bool | `true` (diamond markers) | `false` |
| `gpx_urls` | array | `gpx_urls` | `home_gpx_urls` |
| `use_gpx` | bool | `page.header.use_gpx ?? true` | derived from `trip.header` |
| `autoconnect` | string | `page.header.autoconnect ?? 'on'` | derived from `trip.header` |
| `gpx_source_prefix` | string | `'gpx'` | `'home-gpx'` |
| `journey_id` | string | `'trip-journey'` | `'home-journey'` |

#### `trip-feed-col.html.twig`

The column **beside** the map: date-range header, filter bar, stats/cycling panels, feed loop.

| Parameter | Type | Trip passes | Home-active passes |
|---|---|---|---|
| `trip_page` | Page | `page` | `trip` |
| `all_items` | array | sorted by date, flag 4 (oldest→newest) | sorted by date, flag 3 (newest→oldest) |
| `journal_entries` | array | dailies children | dailies children |
| `journal_count` / `story_count` | int | counts | counts |
| `has_gpx` | bool | `has_gpx` | `home_gpx_urls\|length > 0` |
| `gpx_urls` | array | `gpx_urls` | `home_gpx_urls` |
| `gps_points` | array | `gps_points` | `gps_points` |
| `show_sort` | bool | `true` | `false` (home keeps its own feed order) |
| `trip_header_extras` | bool | `true` | not passed (defaults `false`) |

`trip_header_extras` gates the trip-page-only header block (one-liner `.home-trip-tagline`, expandable `.trip-header-desc`, `.trip-header-banner` cover strip) rendered between the counts and the filter bar. `home.html.twig` omits it so those extras never leak onto the home route.

**Sibling:** `home-predeparture.html.twig` is the home-only "Coming soon" landing state, taking only `trip_page`. `home.html.twig` picks it with `{% if all_items|length == 0 %}` → `home-predeparture` `{% else %}` → `trip-feed-col`. Keep `trip-feed-col` single-purpose — do **not** fold the pre-departure branch back into it.

**Stats/cycling JS glue:** the partial emits an inline `DOMContentLoaded` script calling `window.initTripStats({ gpxUrls, gpsPoints, hasGpx })` — one shared function in `js/src/main.js`. It no-ops when `#stat-distance` is absent, populates exact distance + cycling stats from GPX, and falls back to a `~`-prefixed haversine estimate (or `—` for `<2` points) when there is no GPX. It depends on `window.MapUtils` from `map.js` (loaded in the `bottom` asset group on both pages).

> History: the map setup replaced an older three-variant arrangement (a `feed-map.html.twig` partial with its own inline init, plus a full-page `map.html.twig`), deleted in the 2026-07-04 standalone-page cleanup.

---

## Trip entity structure

The site is organized around Trip entities. The active trip is set in `user/config/site.yaml` → `active_trip`, as a **route** (e.g. `/trips/denmark-2026`), not a bare slug.

```
user/pages/01.trips/
└─ denmark-2026/
   ├─ trip.md              ← template: trip; title, date_start, cover_image, album_url
   ├─ *.gpx               ← GPX route files (served as page media; auto-detected by trip.html.twig)
   ├─ 01.dailies/         ← journal entry children (container .md is routable:false)
   └─ 04.stories/         ← story children (container .md is routable:false)
```

`01.dailies/` and `04.stories/` are inert data containers — the trip page aggregates their children; visiting the container routes directly 404s/redirects. (The former `02.map/` and `03.stats/` folders were removed with their view templates.)

---

## GPX data flow

```
GPX file uploaded to trip page media
         │
         ▼
user/pages/01.trips/<slug>/*.gpx
         │
         ▼
trip.html.twig / home.html.twig: trip_page.media.all → filter .gpx → entry-map partial
         │
         ▼
MapLibre source: each GPX file parsed by toGeoJSON (bundled in js/map.js) → GeoJSON source
         │
         ▼
Connector suppression: same-file 10km proximity check prevents spurious inter-track segments
         │  (override with force_connect: true in trip frontmatter)
         ▼
Rendered as route polyline on map
```

---

## Data flow for a post submission

```
1. User fills /post form and taps Submit
2. Grav Form plugin validates: title and content required
3. cache-on-save (onFormValidationProcessed) injects the write target:
     parent ← derived from site.active_trip  (e.g. /trips/denmark-2026/dailies)
     overwrite_mode ← edit if edit_path filled, else false
4. add-page-by-form reads post-form.md:
     pageconfig.slug_field:  date,title
     pagefrontmatter:        template: entry
5. New page written to:
     user/pages/01.trips/denmark-2026/01.dailies/
     └─ 2026-07-20-0930-first-day-in-kyoto.entry/
        └─ entry.md
6. Photos moved into the same folder
7. cache-on-save calls $grav['cache']->deleteAll()
8. Browser: form shows success message
9. Feed at /trips/denmark-2026 immediately shows new entry
```

---

## Key config files

| File | Purpose |
|---|---|
| `user/config/site.yaml` | `active_trip` route; site title/description |
| `user/config/system.yaml` | Twig cache, flex accounts/pages, language prefix |
| `user/config/media.yaml` | Registers `.gpx` as a valid media type |
| `user/plugins/api/api.yaml` | `session_enabled: true` for GPX manager auth |
| `user/themes/intotheeast/css/tokens.css` | Design tokens (colors, fonts, spacing) |
| `CLAUDE.md` | Project rules and always-loaded context for Claude |