docs(filters): user manual — guide, cookbook, generated field reference

The filter manual (docs/user/filters/), folded in from the parked plan
now that the UI matches the backend (group ALL/ANY header toggle,
2344f568):

- index.md — the guide: the three homes of filters (drawer/saved
  filters, smart collections, dashboard sections), the books/episodes
  scope door, rule anatomy, value picking (chips with x, live counts
  under other rules), GROUPS via the new header toggle (+ the row
  chips as the fine-tuning tool), the live match count, today's
  defaults (reversed listening order, family-lens scoping,
  un-downloaded episodes), saving and shareable views.
- cookbook.md — seven exact-clicks recipes (born-reversed briefing,
  OR-across-authors, big-unread-fantasy, downloaded-unplayed,
  new-arrivals, dashboard shelf, shareable views). Every claim
  cross-checked against the generated reference — which caught the
  one wrong operator label in my first draft ("within last" vs the
  real "within the last"), the drift protection working as designed.
- fields.md — GENERATED from FilterFieldsPayload by
  TestFieldReferenceDocIsCurrent: the drift test fails the build if
  the registry ever changes without regenerating the docs (user
  decision: docs forced to match working code; FILTER_DOCS_REGEN=1
  regenerates).
- searching-and-filtering.md cross-links to the folder.
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# Filter cookbook
Real questions, exact clicks. Every recipe uses the same builder described in
[the guide](index.md) — same fields, same rules, wherever filters live.
Recipes marked **collection** become smart collections that stay current forever; the rest are
drawer filters you can save with a name.
---
## "New chapters of 7th Son, automatically" — collection
1. **Collections** → open (or create) a collection → **Rules**.
2. The scope is already *Episodes*. Add a rule: **Feed** → **in** → pick
*7th Son: Book One* (it becomes a chip — hit the × if you pick wrong).
3. Add a second rule: **Title** → **contains** → `Chapter`.
4. The header should read **MATCH ALL** (it does by default — every rule must match).
5. **Apply to Collection**. Done: new chapters appear on their own, and the listening order
starts at **Feed order (reversed)** — chapter 1 first.
---
## "Lewis Carroll or George Orwell" — drawer
1. **Filters** on the All Books page. Add: **Author** → **contains** → `Carroll`.
2. Add a second rule: **Author** → **contains** → `Orwell`.
3. Click the group header **MATCH ALL** once — it flips to **MATCH ANY** (or click the `AND`
chip between the two rules, same effect).
4. **Apply Filters**. Either author is enough.
*Flip it back to ALL and you'd get only books they both wrote — which is none, and the counter
will tell you so before you apply.*
---
## "Long fantasy books I haven't started" — drawer
1. **Genre** → **is** → `fantasy`.
2. **Page count** → **at least** → `400`.
3. **My reading** → **Reading status** → **is** → *Unfinished* (or your app's wording — the
status list is the fixed dropdown on that field).
4. **MATCH ALL** stays on: all three must hold.
5. Apply — then **Save** it as *"Big unread fantasy"* and it's in the Load menu forever.
---
## "Downloaded podcast episodes I haven't played" — collection
1. A collection with an Episodes scope (see the first recipe — drop the Title rule if you want
whole feeds).
2. **Downloaded** → **is true**.
3. **Played** → **is false**.
4. **MATCH ALL** on. **Apply to Collection**.
---
## "Added to my library this month" — drawer
1. **Date added** → **within the last** → `30` (the days box — the field's page in
[Every filter field](fields.md) has its exact questions).
2. Optionally **MATCH ALL** with **Library** → **in** → your audiobooks library.
3. Save as *"New arrivals"*.
---
## "A dashboard shelf that builds itself" — dashboard
1. Create a collection with the rules above (or open one).
2. On the dashboard, add a section pointed at that collection.
3. The shelf re-fills itself as your library changes — no maintenance.
---
## Sharing a filtered view
Apply any filter, then copy the address bar. The filter rides in the URL — send it to another
user of your server and they open the same narrowed view (they see it through their own
libraries, not yours).
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<!-- GENERATED by TestFieldReferenceDocIsCurrent (internal/services/filter_docs_test.go)
from the filter registry — the same source the real menus render. DO NOT EDIT by hand:
regenerate with FILTER_DOCS_REGEN=1 go test ./internal/services -run TestFieldReferenceDocIsCurrent -->
# Every filter field
This is the complete list of everything the filters can ask about, generated straight from the
same source the app's menus render — it cannot drift from what you see in the UI.
Filters come in two worlds:
- **Books** — rules about books and your reading of them.
- **Episodes** — rules about podcast episodes (feeds, downloaded, played).
Every rule is **a field + a question + your values**. The "Ask" column is the question;
the "Your values" column is what you provide. The **default** question is what a new rule
starts with.
## Books
### Book facts
**Title** — Type words.
| Ask | Means |
| --- | --- |
| contains | contains these words *(default)* |
| doesn't contain | does NOT contain these words |
| is | matches exactly |
| isn't | matches anything but this |
| is empty | — |
**Subtitle** — Type words.
| Ask | Means |
| --- | --- |
| contains | contains these words *(default)* |
| doesn't contain | does NOT contain these words |
| is | matches exactly |
| isn't | matches anything but this |
| is empty | — |
**Description** — Type words.
| Ask | Means |
| --- | --- |
| contains | contains these words *(default)* |
| doesn't contain | does NOT contain these words |
| is | matches exactly |
| isn't | matches anything but this |
| is empty | — |
**Summary** — No value needed — the question is the whole rule.
| Ask | Means |
| --- | --- |
| has | has a value *(default)* |
| missing | is empty or missing |
**Language** — Type words.
| Ask | Means |
| --- | --- |
| contains | contains these words *(default)* |
| doesn't contain | does NOT contain these words |
| is | matches exactly |
| isn't | matches anything but this |
| is empty | — |
**Page count** — Type a number.
| Ask | Means |
| --- | --- |
| between | falls between two numbers |
| at least | is at least this *(default)* |
| at most | is at most this |
| is empty | — |
**Chapter count** — Type a number.
| Ask | Means |
| --- | --- |
| between | falls between two numbers |
| at least | is at least this *(default)* |
| at most | is at most this |
| is empty | — |
**Total characters** — Type a number.
| Ask | Means |
| --- | --- |
| between | falls between two numbers |
| at least | is at least this *(default)* |
| at most | is at most this |
| is empty | — |
**Community rating** — Type a number.
| Ask | Means |
| --- | --- |
| between | falls between two numbers |
| at least | is at least this *(default)* |
| at most | is at most this |
| is empty | — |
**Date added** — Type a number of days.
| Ask | Means |
| --- | --- |
| within the last | — *(default)* |
| between | falls between two numbers |
| is empty | — |
**Date imported** — Type a number of days.
| Ask | Means |
| --- | --- |
| within the last | — *(default)* |
| between | falls between two numbers |
| is empty | — |
**Web URL** — No value needed — the question is the whole rule.
| Ask | Means |
| --- | --- |
| has | has a value *(default)* |
| missing | is empty or missing |
**Metadata notes** — No value needed — the question is the whole rule.
| Ask | Means |
| --- | --- |
| has | has a value *(default)* |
| missing | is empty or missing |
**ISBN** — Pick from a dropdown of real names — picks become removable chips, and you can pick several.
| Ask | Means |
| --- | --- |
| is | is one of the ones you pick |
| isn't | matches anything but this |
| has | has a value *(default)* |
| missing | is empty or missing |
**ASIN** — Pick from a dropdown of real names — picks become removable chips, and you can pick several.
| Ask | Means |
| --- | --- |
| is | is one of the ones you pick |
| isn't | matches anything but this |
| has | has a value *(default)* |
| missing | is empty or missing |
**File size** — Type a number.
| Ask | Means |
| --- | --- |
| between | falls between two numbers |
| at least | is at least this *(default)* |
| at most | is at most this |
| is empty | — |
**File availability** — Choose from a fixed list of options.
| Ask | Means |
| --- | --- |
| is | matches exactly *(default)* |
| isn't | matches anything but this |
**Explicit** — No value needed — the question is the whole rule.
| Ask | Means |
| --- | --- |
| is true | is switched on *(default)* |
| is false | is switched off |
**Abridged** — No value needed — the question is the whole rule.
| Ask | Means |
| --- | --- |
| is true | is switched on *(default)* |
| is false | is switched off |
**Manually edited** — No value needed — the question is the whole rule.
| Ask | Means |
| --- | --- |
| is true | is switched on *(default)* |
| is false | is switched off |
**Cover** — No value needed — the question is the whole rule.
| Ask | Means |
| --- | --- |
| has | has a value *(default)* |
| missing | is empty or missing |
**Added by** — Pick from a dropdown of real names — picks become removable chips, and you can pick several.
| Ask | Means |
| --- | --- |
| is | is one of the ones you pick |
| has | has a value *(default)* |
| missing | is empty or missing |
### Comics & manga
**Series** — Type words.
| Ask | Means |
| --- | --- |
| contains | contains these words *(default)* |
| doesn't contain | does NOT contain these words |
| is | matches exactly |
| isn't | matches anything but this |
| is empty | — |
**Series number** — Type a number.
| Ask | Means |
| --- | --- |
| between | falls between two numbers |
| at least | is at least this *(default)* |
| at most | is at most this |
| is empty | — |
**Series count** — Type a number.
| Ask | Means |
| --- | --- |
| between | falls between two numbers |
| at least | is at least this *(default)* |
| at most | is at most this |
| is empty | — |
**Volume** — Type a number.
| Ask | Means |
| --- | --- |
| between | falls between two numbers |
| at least | is at least this *(default)* |
| at most | is at most this |
| is empty | — |
**Format group** — Pick from a dropdown of real names — picks become removable chips, and you can pick several.
| Ask | Means |
| --- | --- |
| is | is one of the ones you pick *(default)* |
| isn't | matches anything but this |
**File type (mime)** — Pick from a dropdown of real names — picks become removable chips, and you can pick several.
| Ask | Means |
| --- | --- |
| is | is one of the ones you pick *(default)* |
| isn't | matches anything but this |
**Reflowable** — No value needed — the question is the whole rule.
| Ask | Means |
| --- | --- |
| is true | is switched on *(default)* |
| is false | is switched off |
**Fixed layout** — No value needed — the question is the whole rule.
| Ask | Means |
| --- | --- |
| is true | is switched on *(default)* |
| is false | is switched off |
**Black & white** — No value needed — the question is the whole rule.
| Ask | Means |
| --- | --- |
| is true | is switched on *(default)* |
| is false | is switched off |
**Manga type** — Pick from a dropdown of real names — picks become removable chips, and you can pick several.
| Ask | Means |
| --- | --- |
| is | is one of the ones you pick *(default)* |
| isn't | matches anything but this |
| is empty | — |
**Reading direction** — Pick from a dropdown of real names — picks become removable chips, and you can pick several.
| Ask | Means |
| --- | --- |
| is | is one of the ones you pick *(default)* |
| isn't | matches anything but this |
| is empty | — |
### Library
**Library** — Pick from a dropdown of real names — picks become removable chips, and you can pick several.
| Ask | Means |
| --- | --- |
| is | is one of the ones you pick *(default)* |
| isn't | matches anything but this |
### My reading
**Reading status** — Choose from a fixed list of options.
| Ask | Means |
| --- | --- |
| is | matches exactly *(default)* |
**Progress percent** — Type a number.
| Ask | Means |
| --- | --- |
| between | falls between two numbers |
| at least | is at least this *(default)* |
| at most | is at most this |
| is empty | — |
**Last read** — Type a number of days.
| Ask | Means |
| --- | --- |
| within the last | — *(default)* |
| between | falls between two numbers |
| is empty | — |
**My rating** — Type a number.
| Ask | Means |
| --- | --- |
| is | matches exactly |
| at least | is at least this *(default)* |
| at most | is at most this |
| unrated | — |
**Has review** — No value needed — the question is the whole rule.
| Ask | Means |
| --- | --- |
| has | has a value *(default)* |
| missing | is empty or missing |
**Notes** — No value needed — the question is the whole rule.
| Ask | Means |
| --- | --- |
| has | has a value *(default)* |
| missing | is empty or missing |
| within the last | — |
**Highlights** — No value needed — the question is the whole rule.
| Ask | Means |
| --- | --- |
| has | has a value *(default)* |
| missing | is empty or missing |
| within the last | — |
**Note text** — No value needed — the question is the whole rule.
| Ask | Means |
| --- | --- |
| contains | contains these words *(default)* |
| doesn't contain | does NOT contain these words |
| is empty | — |
**Highlight text** — No value needed — the question is the whole rule.
| Ask | Means |
| --- | --- |
| contains | contains these words *(default)* |
| doesn't contain | does NOT contain these words |
| is empty | — |
**Time spent (minutes)** — Type a number.
| Ask | Means |
| --- | --- |
| between | falls between two numbers |
| at least | is at least this *(default)* |
| at most | is at most this |
**Pages read** — Type a number.
| Ask | Means |
| --- | --- |
| between | falls between two numbers |
| at least | is at least this *(default)* |
| at most | is at most this |
**In collection** — Pick from a dropdown of real names — picks become removable chips, and you can pick several.
| Ask | Means |
| --- | --- |
| in | is one of the ones you pick (any one is enough) *(default)* |
| isn't in | is none of the ones you pick |
| in any | is in at least one of the collections you pick |
| in none | — |
### People
**Author** — Type words.
| Ask | Means |
| --- | --- |
| contains | contains these words *(default)* |
| doesn't contain | does NOT contain these words |
| is | matches exactly |
| isn't | matches anything but this |
| is empty | — |
**Narrator** — Type words.
| Ask | Means |
| --- | --- |
| contains | contains these words *(default)* |
| doesn't contain | does NOT contain these words |
| is | matches exactly |
| isn't | matches anything but this |
| is empty | — |
**Contributor** — Type words.
| Ask | Means |
| --- | --- |
| contains | contains these words *(default)* |
| doesn't contain | does NOT contain these words |
| is | matches exactly |
| isn't | matches anything but this |
| is empty | — |
### Publishing
**Publisher** — Type words.
| Ask | Means |
| --- | --- |
| contains | contains these words *(default)* |
| doesn't contain | does NOT contain these words |
| is | matches exactly |
| isn't | matches anything but this |
| is empty | — |
**Imprint** — Type words.
| Ask | Means |
| --- | --- |
| contains | contains these words *(default)* |
| doesn't contain | does NOT contain these words |
| is | matches exactly |
| isn't | matches anything but this |
| is empty | — |
**Edition** — Type words.
| Ask | Means |
| --- | --- |
| contains | contains these words *(default)* |
| doesn't contain | does NOT contain these words |
| is | matches exactly |
| isn't | matches anything but this |
| is empty | — |
**Published year** — Type a number.
| Ask | Means |
| --- | --- |
| between | falls between two numbers |
| at least | is at least this *(default)* |
| at most | is at most this |
| is empty | — |
**Published date** — Type a number of days.
| Ask | Means |
| --- | --- |
| within the last | — *(default)* |
| between | falls between two numbers |
| is empty | — |
### Topics
**Genre** — Type words.
| Ask | Means |
| --- | --- |
| contains | contains these words *(default)* |
| doesn't contain | does NOT contain these words |
| is | matches exactly |
| isn't | matches anything but this |
| is empty | — |
**Tags** — Type words.
| Ask | Means |
| --- | --- |
| contains | contains these words *(default)* |
| doesn't contain | does NOT contain these words |
| is | matches exactly |
| isn't | matches anything but this |
| is empty | — |
**Story arc** — Type words.
| Ask | Means |
| --- | --- |
| contains | contains these words *(default)* |
| doesn't contain | does NOT contain these words |
| is | matches exactly |
| isn't | matches anything but this |
| is empty | — |
**Age rating** — Pick from a dropdown of real names — picks become removable chips, and you can pick several.
| Ask | Means |
| --- | --- |
| is | is one of the ones you pick *(default)* |
| isn't | matches anything but this |
| is empty | — |
## Podcast episodes
### Book facts
**Title** — Type words.
| Ask | Means |
| --- | --- |
| contains | contains these words *(default)* |
| doesn't contain | does NOT contain these words |
| is | matches exactly |
| isn't | matches anything but this |
| is empty | — |
**Description** — Type words.
| Ask | Means |
| --- | --- |
| contains | contains these words *(default)* |
| doesn't contain | does NOT contain these words |
| is | matches exactly |
| isn't | matches anything but this |
| is empty | — |
**Language** — Type words.
| Ask | Means |
| --- | --- |
| contains | contains these words *(default)* |
| doesn't contain | does NOT contain these words |
| is | matches exactly |
| isn't | matches anything but this |
| is empty | — |
**Chapter count** — Type a number.
| Ask | Means |
| --- | --- |
| between | falls between two numbers |
| at least | is at least this *(default)* |
| at most | is at most this |
| is empty | — |
**Date added** — Type a number of days.
| Ask | Means |
| --- | --- |
| within the last | — *(default)* |
| between | falls between two numbers |
| is empty | — |
**Date imported** — Type a number of days.
| Ask | Means |
| --- | --- |
| within the last | — *(default)* |
| between | falls between two numbers |
| is empty | — |
**File size** — Type a number.
| Ask | Means |
| --- | --- |
| between | falls between two numbers |
| at least | is at least this *(default)* |
| at most | is at most this |
| is empty | — |
**File availability** — Choose from a fixed list of options.
| Ask | Means |
| --- | --- |
| is | matches exactly *(default)* |
| isn't | matches anything but this |
**Explicit** — No value needed — the question is the whole rule.
| Ask | Means |
| --- | --- |
| is true | is switched on *(default)* |
| is false | is switched off |
### Comics & manga
**File type (mime)** — Pick from a dropdown of real names — picks become removable chips, and you can pick several.
| Ask | Means |
| --- | --- |
| is | is one of the ones you pick *(default)* |
| isn't | matches anything but this |
### Episodes
**Feed** — Pick from a dropdown of real names — picks become removable chips, and you can pick several.
| Ask | Means |
| --- | --- |
| in | is one of the ones you pick (any one is enough) *(default)* |
| isn't in | is none of the ones you pick |
| has | has a value |
| missing | is empty or missing |
**Downloaded** — No value needed — the question is the whole rule.
| Ask | Means |
| --- | --- |
| is true | is switched on *(default)* |
| is false | is switched off |
**Played** — No value needed — the question is the whole rule.
| Ask | Means |
| --- | --- |
| is true | is switched on |
| is false | is switched off *(default)* |
### Library
**Library** — Pick from a dropdown of real names — picks become removable chips, and you can pick several.
| Ask | Means |
| --- | --- |
| is | is one of the ones you pick *(default)* |
| isn't | matches anything but this |
### My reading
**Progress percent** — Type a number.
| Ask | Means |
| --- | --- |
| between | falls between two numbers |
| at least | is at least this *(default)* |
| at most | is at most this |
| is empty | — |
**Last read** — Type a number of days.
| Ask | Means |
| --- | --- |
| within the last | — *(default)* |
| between | falls between two numbers |
| is empty | — |
**My rating** — Type a number.
| Ask | Means |
| --- | --- |
| is | matches exactly |
| at least | is at least this *(default)* |
| at most | is at most this |
| unrated | — |
**Has review** — No value needed — the question is the whole rule.
| Ask | Means |
| --- | --- |
| has | has a value *(default)* |
| missing | is empty or missing |
**Notes** — No value needed — the question is the whole rule.
| Ask | Means |
| --- | --- |
| has | has a value *(default)* |
| missing | is empty or missing |
| within the last | — |
**Highlights** — No value needed — the question is the whole rule.
| Ask | Means |
| --- | --- |
| has | has a value *(default)* |
| missing | is empty or missing |
| within the last | — |
**Note text** — No value needed — the question is the whole rule.
| Ask | Means |
| --- | --- |
| contains | contains these words *(default)* |
| doesn't contain | does NOT contain these words |
| is empty | — |
**Highlight text** — No value needed — the question is the whole rule.
| Ask | Means |
| --- | --- |
| contains | contains these words *(default)* |
| doesn't contain | does NOT contain these words |
| is empty | — |
**Time spent (minutes)** — Type a number.
| Ask | Means |
| --- | --- |
| between | falls between two numbers |
| at least | is at least this *(default)* |
| at most | is at most this |
**In collection** — Pick from a dropdown of real names — picks become removable chips, and you can pick several.
| Ask | Means |
| --- | --- |
| in | is one of the ones you pick (any one is enough) *(default)* |
| isn't in | is none of the ones you pick |
| in any | is in at least one of the collections you pick |
| in none | — |
### Publishing
**Published year** — Type a number.
| Ask | Means |
| --- | --- |
| between | falls between two numbers |
| at least | is at least this *(default)* |
| at most | is at most this |
| is empty | — |
**Published date** — Type a number of days.
| Ask | Means |
| --- | --- |
| within the last | — *(default)* |
| between | falls between two numbers |
| is empty | — |
---
*Anything here that doesn't match what the app actually shows is a bug — this page is generated
from the app's own menus and a test fails if they ever disagree.*
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# Filters — the complete guide
Filters answer one question: *of everything in my library, show me the ones that match.*
You'll meet the same filter system in three places:
| Place | What it's for |
| --- | --- |
| **The Filters drawer** (All Books / Podcasts pages) | A quick, temporary narrowing of what you see. Save it if you want to keep it. |
| **Smart collections** (a collection's **Rules** page) | A filter that *lives* — the collection's contents update automatically forever. |
| **Dashboard sections** | The same rules, feeding a shelf on your home screen. |
One system, one set of skills, three payoffs.
## Two worlds: Books and Episodes
Rules about **books** (authors, series, your reading progress) and rules about **podcast episodes**
(feeds, downloaded, played) are two different worlds. The field menus only show the fields that
make sense where you are — you'll never see a podcast field on the All Books page. The complete
list of every field is in [Every filter field](fields.md).
## Anatomy of a rule
Every rule is **a field + a question + your values**:
> **Author** *contains* `asc`
> **Feed** *in* `7th Son: Book One`
> **Page count** *at least* `400`
The field is *what* you're asking about. The question (contains, at least, is empty…) is *how*.
Your values are *what counts as a match*. The complete questions per field are in
[Every filter field](fields.md).
## Picking values
Two kinds of value boxes:
- **Dropdown boxes** (Feed, Library, Collection, Added by): start typing and real names appear,
with live counts of how much matches. Click to pick — each pick becomes a **chip** with a little
**×** to remove it. Pick as many as you like; *any one of them* matching is enough.
- **Typed boxes** (Author, Title, Page count…): just type. Several words means "contains these
words"; number boxes take numbers; date boxes take a number of days.
The dropdown's counts are **live under your other rules**: if you've already narrowed to
*Title contains Chapter*, the feed menu shows how many Chapter-titled episodes each of your feeds
has. Rules already picked disappear from their own menu (removing a chip brings them back).
## Groups: ALL and ANY
When you have several rules, the group header — **MATCH ALL** or **MATCH ANY** — decides how they
combine:
- **MATCH ALL** — *every* rule must match. (The default, and what you want almost always.)
- **MATCH ANY** — *at least one* rule matching is enough. This is how you ask for
"Lewis Carroll **or** George Orwell".
**Click the header to switch it.** It says what it does, and clicking flips it.
`+ group` adds a nested group with its own header (**GROUP ALL / GROUP ANY**), so bigger shapes
build naturally:
> Match ALL: Author *contains* `Carroll` **AND** GROUP ANY (Title contains `Alice` **OR** Title
> contains `Wonderland`)
For fine-tuning inside an ALL group, the small **AND / OR** chip between two rules mixes them —
click `AND` and it becomes `OR`, joining those neighbors together. (The header switch and these
chips are two different tools: the header sets the group's overall combine; a chip makes just two
neighboring rules special.)
## The live count
While you build, the counter at the bottom — *N books match* — runs your rules against the real
library. It's the exact number you'll get when you apply.
## Defaults worth knowing
- **Podcast listening order**: podcast pages and new podcast collections start at
**Feed order (reversed)** — book order, chapter 1 first. Change it per feed or collection from
the order dropdown; your choice sticks.
- **Hidden libraries** (family lens) never match — a filter can't accidentally surface a library
that's hidden from you.
- **Episodes that aren't downloaded** stay out of playback chains (they still appear in lists).
## Keeping a filter
- **Save** (drawer): name it; it appears in the **Load** menu from then on.
- **Apply to Collection** (rules page): the filter becomes the smart collection — live forever.
- Filtered views are **shareable**: the URL carries the filter, so a bookmark or sent link opens
the same view.
+9
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@@ -35,3 +35,12 @@ You can combine tags with other filters:
- Tags use fuzzy matching - "Sci Fi" will match "Science Fiction" - Tags use fuzzy matching - "Sci Fi" will match "Science Fiction"
- Best matching tags appear first in results - Best matching tags appear first in results
- Autocomplete shows existing tags as you type with relevance scores - Autocomplete shows existing tags as you type with relevance scores
## The complete filter guide
The filters described above are one system that also powers smart collections and dashboard
sections — groups with ALL/ANY, saved filters, and every field listed. The full manual lives in
[this folder](filters/index.md): the [guide](filters/index.md), the
[cookbook](filters/cookbook.md) of ready-made recipes, and the generated
[field reference](filters/fields.md).
+157
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@@ -0,0 +1,157 @@
package services
import (
"fmt"
"os"
"sort"
"strings"
"testing"
)
// The user manual's field reference (docs/user/filters/fields.md) is
// GENERATED from FilterFieldsPayload — the single source of truth the
// real menus render from — and pinned by this test: if the registry
// changes without regenerating the docs, this fails. Docs cannot drift
// from working code (2026-11-01, user decision).
//
// Regenerate with: FILTER_DOCS_REGEN=1 go test ./internal/services -run TestFieldReferenceDocIsCurrent
const fieldRefPath = "../../docs/user/filters/fields.md"
func TestFieldReferenceDocIsCurrent(t *testing.T) {
doc := GenerateFieldReferenceDoc()
if os.Getenv("FILTER_DOCS_REGEN") == "1" {
if err := os.WriteFile(fieldRefPath, []byte(doc), 0o644); err != nil {
t.Fatalf("write field reference: %v", err)
}
t.Log("rewrote " + fieldRefPath)
return
}
existing, err := os.ReadFile(fieldRefPath)
if err != nil {
t.Fatalf("docs/user/filters/fields.md is missing — regenerate with FILTER_DOCS_REGEN=1 go test ./internal/services -run TestFieldReferenceDocIsCurrent: %v", err)
}
if string(existing) != doc {
t.Fatal("docs/user/filters/fields.md is STALE — the filter registry changed without regenerating the docs. " +
"Run FILTER_DOCS_REGEN=1 go test ./internal/services -run TestFieldReferenceDocIsCurrent and commit the refreshed file.")
}
}
// kindPhrase — what the value cell looks like for a user, per value kind.
func kindPhrase(kind string) string {
switch kind {
case VKText:
return "Type words."
case VKNumber:
return "Type a number."
case VKDays:
return "Type a number of days."
case VKId:
return "Pick from a dropdown of real names — picks become removable chips, and you can pick several."
case VKFixed:
return "Choose from a fixed list of options."
case VKNone:
return "No value needed — the question is the whole rule."
}
return ""
}
// opPhrase — what each operator asks, in user words.
func opPhrase(op, kind string) string {
switch op {
case "contains":
return "contains these words"
case "not_contains":
return "does NOT contain these words"
case "is":
if kind == VKId {
return "is one of the ones you pick"
}
return "matches exactly"
case "is_not", "isn't":
return "matches anything but this"
case "in":
return "is one of the ones you pick (any one is enough)"
case "not_in":
return "is none of the ones you pick"
case "in_any":
return "is in at least one of the collections you pick"
case "none_of":
return "is in none of the collections you pick"
case "has":
return "has a value"
case "missing":
return "is empty or missing"
case "is_true":
return "is switched on"
case "is_false":
return "is switched off"
case "between":
return "falls between two numbers"
case "at_least":
return "is at least this"
case "at_most":
return "is at most this"
}
return "—"
}
func GenerateFieldReferenceDoc() string {
var b strings.Builder
b.WriteString("<!-- GENERATED by TestFieldReferenceDocIsCurrent (internal/services/filter_docs_test.go)\n")
b.WriteString(" from the filter registry — the same source the real menus render. DO NOT EDIT by hand:\n")
b.WriteString(" regenerate with FILTER_DOCS_REGEN=1 go test ./internal/services -run TestFieldReferenceDocIsCurrent -->\n\n")
b.WriteString("# Every filter field\n\n")
b.WriteString("This is the complete list of everything the filters can ask about, generated straight from the\n")
b.WriteString("same source the app's menus render — it cannot drift from what you see in the UI.\n\n")
b.WriteString("Filters come in two worlds:\n\n")
b.WriteString("- **Books** — rules about books and your reading of them.\n")
b.WriteString("- **Episodes** — rules about podcast episodes (feeds, downloaded, played).\n\n")
b.WriteString("Every rule is **a field + a question + your values**. The \"Ask\" column is the question;\n")
b.WriteString("the \"Your values\" column is what you provide. The **default** question is what a new rule\n")
b.WriteString("starts with.\n\n")
for _, scope := range []string{ScopeBooks, ScopeEpisodes} {
scopeTitle := "Books"
if scope == ScopeEpisodes {
scopeTitle = "Podcast episodes"
}
fmt.Fprintf(&b, "## %s\n\n", scopeTitle)
fields := FilterFieldsPayload(scope)
groups := []string{}
byGroup := map[string][]FilterFieldWire{}
for _, f := range fields {
if _, seen := byGroup[f.Group]; !seen {
groups = append(groups, f.Group)
}
byGroup[f.Group] = append(byGroup[f.Group], f)
}
sort.Strings(groups)
for _, g := range groups {
fmt.Fprintf(&b, "### %s\n\n", g)
for _, f := range byGroup[g] {
fmt.Fprintf(&b, "**%s** — %s\n\n", f.Label, kindPhrase(f.ValueKind))
lines := make([]string, 0, len(f.Ops))
for _, op := range f.Ops {
label := op.Label
if label == "" {
label = op.Key
}
def := ""
if op.Key == f.DefaultOp {
def = " *(default)*"
}
lines = append(lines, fmt.Sprintf("| %s | %s%s |", label, opPhrase(op.Key, f.ValueKind), def))
}
b.WriteString("| Ask | Means |\n| --- | --- |\n")
b.WriteString(strings.Join(lines, "\n"))
b.WriteString("\n\n")
}
}
}
b.WriteString("---\n\n")
b.WriteString("*Anything here that doesn't match what the app actually shows is a bug — this page is generated\n")
b.WriteString("from the app's own menus and a test fails if they ever disagree.*\n")
return b.String()
}