intotheeast-com/docs/reference/architecture.md

Architecture Overview

How the intotheeast site hangs together.

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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

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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.

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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.

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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.)

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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

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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

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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