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novaconium/README.md
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code 37b6764431 Add content index: keywords, tags/categories, search, and XML sitemap 
Ships Blog tags/categories, Internal search, and XML sitemap together as
one shared mechanism, plus a new meta keywords request, rather than three
separate ones - the "worth deciding together" call ISSUES.md made when
XML sitemap was first written.

Content stays in files. Per-page metadata is four Twig blocks in the
root layout, the same override mechanism already used for
title/description/og_* - keywords (rendered), tags/changefreq/priority
(not rendered, harvested only). App\ContentIndexer crawls every routable
page (Overlay::listPageDirs(), new) and pulls each block via
Renderer::renderForIndex() (new) calling Twig's own renderBlock() API,
not regex-parsing .twig source, so overrides and layout inheritance
resolve exactly like a real render. Rendered HTML is stripped and
indexed into a SQLite FTS5 table for search.

Off by default (content_index_enabled) - same posture as Matomo/admin
auth, since this is a real SQLite dependency plenty of sites won't want.
Verified true zero footprint when disabled: no data/novaconium.sqlite
gets created, all three consumer routes 404 like they don't exist.
content_index_auto (default true) reindexes lazily on first stale touch
of a consumer route, never on a normal page view; both that path and the
explicit `php novaconium/bin/index-content.php` share one reindex().

Two real bugs caught by testing, not review: a reentrancy bug where
/search's own sidecar calling ensureFresh() during the crawl triggered a
nested reindex() mid-transaction (fixed with a static re-entrancy guard),
and a wrong PDO constant in the search sidecar. Also fixed two unrelated
pre-existing bugs found while building this: an unescaped {{ }} in
admin/docs/sidecars that fataled Twig on any real render of that page,
and a stale "no database layer yet" claim there and in Lib\Input's
docblock, left over from before Lib\Db shipped.

Lib\Db's migrations_dir now accepts an ordered list of roots, not just
one path, so the content index's schema could ship as a framework
migration (novaconium/migrations/) without colliding with project
migrations in App/migrations/ - the two-root extension point flagged in
AGENTS.md when SQLite groundwork shipped. Migrations are tracked by path
relative to the repo root rather than bare filename so two roots with a
same-named file can't shadow each other.

New consumer routes: novaconium/pages/sitemap.xml/ and
novaconium/pages/search/ (framework defaults), App/pages/blog/tag/[tag]/
(project-owned, since blog/ is project content - the existing hand
-written post array in App/pages/blog/index.php is untouched). Added
tags to the 4 existing blog posts as a real demonstration.

Closes the Blog tags/categories, Internal search, and XML sitemap
backlog items in novaconium/ISSUES.md.
2026-07-14 17:35:30 +00:00

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# novaconium
A tiny, Hugo-flavored PHP micro-framework. Routes are directories on disk, pages render with [Twig](https://twig.symfony.com/), and any page that needs real logic gets an optional PHP "sidecar" file. Pages without a sidecar are pre-rendered once and served as static HTML straight from Apache afterwards. No Composer — Twig is vendored directly into the repo as plain source files.
## Features
- **File-based routing** — a directory under `App/pages/` *is* a route (Hugo-style page bundles). No route table to maintain.
- **`[param]` segments** — a directory literally named `[param]` (e.g. `App/pages/products/[id]/`) captures any single URL segment into `$params['param']` for clean URLs, no query strings.
- **Optional PHP "sidecars"** — drop an `index.php` next to any `index.twig` to supply Twig context data, or return a `Response` (redirect/JSON/XML/HTML) to short-circuit templating entirely.
- **Static caching, zero config** — sidecar-less pages render once and are written to `public/cache/`; `.htaccess` serves the cached file directly on every later hit, skipping PHP and Twig entirely.
- **Override-by-path** — `App/` (your project) is checked before `novaconium/` (the framework defaults) for every page, layout, `Lib\` class, and even the Sass color palette (`App/sass/_colors.sass`). Drop a file at the same relative path to override it; nothing needs duplicating to get a working site.
- **Layout inheritance** — `_layout/layout.twig` directories are resolved by walking upward from the matched page, so you can override the layout for a whole subtree.
- **SEO boilerplate out of the box** — the default layout ships meta description, canonical link, robots, Open Graph, and Twitter Card tags, all overridable per-page via Twig blocks.
- **Built-in Matomo analytics** — set `matomo_url` and `matomo_site_id` in `App/config.php` to enable tracking site-wide, including automatic 404 tracking. Off by default.
- **Admin authentication** — gate every `/admin/*` route behind HTTP Basic Auth by setting `admin_username`/`admin_password_hash` in `App/config.php`; reusable for any admin page a project adds later, with a `/admin/logout` link to clear cached credentials and a built-in `/admin/password-hash` form so generating the hash doesn't require the CLI. Off by default.
- **Draft pages** — list a route under `draft_routes` in `App/config.php` to make it visible only to an authenticated admin; anyone else gets a plain 404, not a login prompt. Reuses the admin auth check directly, and is excluded from static caching so a cached copy can't leak the draft to the public. See `/admin/docs/drafts`.
- **Dark/light theme toggle** — a nav button flips a `data-theme` attribute (persisted to `localStorage`) that swaps every color via CSS custom properties; both palettes live in `App/sass/_colors.sass`, same override mechanism as everything else.
- **Self-hosted spam prevention & form validation** — `Lib\SpamGuard`, a reusable class for any form: a CSS-hidden honeypot field plus a submission-timing check, no external CAPTCHA service, site key, or outbound API call. Pairs with `Lib\FormValidator` (accumulating required-field/email/length checks) and `Lib\Validate` (the underlying validation primitives — email, length, phone, postal/zip, spam-word checks). All three ship in `novaconium/lib/`, demonstrated on the contact form.
- **Form security by default** — `Lib\Input`, a cleaning accessor for `$_POST`/`$_GET` (defense-in-depth against HTML/script injection, not a substitute for parameterized queries), and `Lib\Csrf`, standalone session-token CSRF protection called directly from a sidecar. Both ship in `novaconium/lib/`, wired into the contact form, `/admin/clear-cache`, and `/admin/password-hash`.
- **SQLite/MySQL database, zero setup** — `Lib\Db`, a thin PDO wrapper (no ORM) supporting multiple named connections open at once — e.g. this site's own SQLite data plus a MySQL connection to a legacy database, usable in the same sidecar — each with its own plain-SQL migration convention, applied automatically on first use or via `php novaconium/bin/migrate.php`. SQLite data lives in a project-owned top-level `data/` directory, outside both `public/` and `novaconium/`. See `/admin/docs/database`.
- **Sessions with flash data** — `Lib\Session`, a thin wrapper around native PHP sessions with CodeIgniter-style flash values (set now, readable on exactly the next request) for post/redirect/GET flows without a query-string flag. Lazy-start, same mechanism `Lib\Csrf` already uses. See `/admin/docs/session`.
- **Content index: sitemap, search, tags** — `/sitemap.xml`, full-text `/search` (SQLite FTS5), and blog tag browsing all share one crawler that renders every page and harvests `keywords`/`tags`/`changefreq`/`priority` Twig blocks via Twig's own `renderBlock()` — no front-matter, no separate metadata files. Off by default (depends on SQLite); reindexes lazily on demand or via `php novaconium/bin/index-content.php`. See `/admin/docs/content-index`.
- **No build step, no Composer** — clone it, point Apache (or `php -S`) at `public/`, and it runs. Twig is vendored as source; see `/admin/docs/upgrading-twig` for upgrading it.
## Getting started
**Requirements:** PHP 8.1+ (uses `readonly` constructor-promoted properties) with the `pdo_sqlite` extension (bundled with PHP, just needs to be enabled — no separate install; add `pdo_mysql` too if using a MySQL connection), and, for production, Apache with `mod_rewrite` and `AllowOverride All`. The content index's search (`/admin/docs/content-index`) additionally needs SQLite's FTS5 extension, bundled with `pdo_sqlite` on virtually every modern PHP build — only relevant if `content_index_enabled` is turned on.
### Run it locally (no Apache needed)
```
php -S 127.0.0.1:8000 -t public public/router.php
```
`public/router.php` is a dev-only script that mimics the `.htaccess` rules (canonical redirects + static cache lookup) so you can develop without Apache. It is never used in production — Apache reads `public/.htaccess` directly.
Visit `http://127.0.0.1:8000/` for the static home page, then click around — `/about`, `/blog/hello-world`, `/contact`, and `/admin` (cache clearing + these same docs, rendered live) are all included as working examples.
### Deploy on Apache
Point the vhost's document root at `public/`, make sure `mod_rewrite` is enabled and `AllowOverride All` is set for that directory so `public/.htaccess` takes effect, and it just works — no build step required.
### Starting a new project
Clone this repo and drop its Git history — no Composer scaffold or installer:
```
git clone --depth 1 <novaconium-repo-url> my-new-project
cd my-new-project
rm -rf .git && git init && git add -A && git commit -m "Initial commit from novaconium template"
```
Then replace the example content under `App/pages/` with your own; leave `novaconium/` and `public/` alone.
### Updating the framework
Since the framework core lives entirely under `novaconium/`, pick up a new release by overwriting just that directory against a tag and committing the diff:
```
git clone --depth 1 --branch <release-tag> <novaconium-repo-url> /tmp/nova-update
rm -rf novaconium && cp -r /tmp/nova-update/novaconium ./novaconium && rm -rf /tmp/nova-update
git add novaconium && git commit -m "Update novaconium framework to <release-tag>"
```
Safe by construction — `App/` always overrides `novaconium/`, so an update can't clobber project customizations. See [Getting started](http://127.0.0.1:8000/admin/docs/getting-started) for the full write-up.
### Add a page
Create a directory under `App/pages/` with an `index.twig` — the directory path *is* the URL:
```
App/pages/pricing/index.twig -> /pricing
```
Add an `index.php` next to it if the page needs data or logic. See [Sidecars](http://127.0.0.1:8000/admin/docs/sidecars) in the docs for the full contract, or [SEO](http://127.0.0.1:8000/admin/docs/seo) for a ready-to-paste starter template with every overridable block — or skip the copy-paste and scaffold it:
```
php novaconium/bin/create-static-page.php blog/my-new-post
```
## Documentation
The full framework documentation — routing, sidecars, libraries, database, session, content index, layouts, static caching, SEO, Matomo analytics, admin authentication, draft pages, styling, project layout, and third-party notices — lives at `/admin/docs` on any running instance (so it travels with the code, no internet connection needed). Highlights:
- [Getting started](http://127.0.0.1:8000/admin/docs/getting-started)
- [Routing](http://127.0.0.1:8000/admin/docs/routing)
- [Sidecars](http://127.0.0.1:8000/admin/docs/sidecars)
- [Libraries](http://127.0.0.1:8000/admin/docs/libraries)
- [Database](http://127.0.0.1:8000/admin/docs/database)
- [Session](http://127.0.0.1:8000/admin/docs/session)
- [Content index](http://127.0.0.1:8000/admin/docs/content-index)
- [Layouts](http://127.0.0.1:8000/admin/docs/layouts)
- [Static caching](http://127.0.0.1:8000/admin/docs/caching)
- [SEO](http://127.0.0.1:8000/admin/docs/seo)
- [Matomo](http://127.0.0.1:8000/admin/docs/matomo)
- [Admin authentication](http://127.0.0.1:8000/admin/docs/admin-auth)
- [Draft pages](http://127.0.0.1:8000/admin/docs/drafts)
- [Styling](http://127.0.0.1:8000/admin/docs/styling)
- [Project layout](http://127.0.0.1:8000/admin/docs/project-layout)
- [Third-party](http://127.0.0.1:8000/admin/docs/third-party)
`AGENTS.md` is the short, agent-facing version for coding assistants working in this repo, and `novaconium/ISSUES.md` is the roadmap/backlog.
## Project layout
```
App/ your project — pages/ (routes), lib/ (Lib\ classes), sass/ (color overrides) — the only directory you're expected to edit
public/ Apache document root — front controller, .htaccess, static cache, compiled CSS
novaconium/ the framework itself — router, renderer, vendored Twig, default pages/lib/sass — not edited per-project
```
See [Project layout](http://127.0.0.1:8000/admin/docs/project-layout) for the full tree with every file explained.
## Third-party
[Twig](https://twig.symfony.com/) is vendored in source form under `novaconium/vendor/twig/` (no Composer — see `/admin/docs/upgrading-twig` for how to upgrade it). It's BSD-3-Clause licensed; the full license text ships alongside it at `novaconium/vendor/twig/LICENSE`.
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