294 lines
11 KiB
JavaScript
294 lines
11 KiB
JavaScript
import {
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SUPPORTED_DATA_SOURCES, SUPPORTED_PERIODS, SUPPORTED_SECTION_TYPES,
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SUPPORTED_SKILL_PAGES, canonicalPage, dataSourceFor, isSourceWritable, surfaceFor,
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} from './surfaces';
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/**
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* The `ui:` block of a skill definition, checked and normalized.
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*
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* A definition declares what it wants; this decides whether the product can
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* honour it, and turns a loose YAML shape into one predictable record. Two
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* things follow from doing it here rather than in the renderer:
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*
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* - **Nothing unknown reaches a component.** Every page, placement, type,
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* data source and period is checked against the closed vocabulary in
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* `surfaces.js`. An unrecognised value is an error with a message naming
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* it, not a silently dropped key and not a rendered blank.
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* - **Only listed keys survive.** The normalized section carries exactly the
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* fields the renderers read. Anything else an author writes is ignored
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* rather than passed through, so no property can arrive at React that this
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* module did not put there.
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*/
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/**
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* A section as the renderers receive it. Nothing else is carried.
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*
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* Used by both consumers of a definition. The page passes a `page`, so the
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* section is checked against that surface's placements; Owliver passes
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* `placement: false`, because a chat reply has no placement to sit at — the
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* rest of the checks, and the record that comes out, are identical. That is
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* deliberate: it is what makes a flow drawn in the panel the same section as
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* the flow drawn on the page rather than a parallel shape that resembles it.
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*
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* `types` narrows what `type:` may be. The page offers the components it can
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* mount; Owliver offers those plus the shapes that are only answers.
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*/
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export function normalizeSection(raw, {
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page, errors, seen, fallbackId = '', where: label = null,
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placement: wantPlacement = true, types = SUPPORTED_SECTION_TYPES,
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shapeFor = (type) => type,
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}) {
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const where = label || `ui.${page}`;
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/* Where an error points. A page section is addressed by the id it was given;
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a capability response is already addressed by the capability it answers, so
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appending a generated section id there would name something the author
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never wrote. */
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const at = label ? where : null;
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if (!raw || typeof raw !== 'object' || Array.isArray(raw)) {
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errors.push(`${where}: each section must be a mapping of options.`);
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return null;
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}
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/* An id is how a section is keyed and de-duplicated, not something an author
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should have to invent for a definition that declares exactly one. Falls
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back to the title, then to the skill's own id. */
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const slug = (value) => String(value || '')
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.toLowerCase().trim().replace(/[^a-z0-9]+/g, '-').replace(/^-|-$/g, '');
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const id = slug(raw.id) || slug(raw.title) || slug(fallbackId);
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if (!id) {
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errors.push(`${where}: a section needs an \`id\`.`);
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return null;
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}
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if (!/^[a-z0-9][a-z0-9-]*$/.test(id)) {
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errors.push(`${at || `${where}.${id}`}: \`id\` must be lower-case letters, numbers and dashes.`);
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return null;
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}
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if (seen.has(id)) {
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errors.push(`${where}: two sections share the id \`${id}\`.`);
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return null;
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}
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seen.add(id);
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const type = String(raw.type || '').trim();
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if (!type) {
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errors.push(`${at || `${where}.${id}`}: a section needs a \`type\`.`);
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return null;
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}
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if (!types.includes(type)) {
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errors.push(
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`Unsupported skill component: ${type}. Supported types: ${types.join(', ')}.`
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);
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return null;
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}
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/* `position:` is what the format calls it; `placement:` is accepted because
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it is the word the rest of the system uses. A section that is an answer
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rather than a panel has nowhere to be placed, and says so with `null`. */
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let placement = null;
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if (wantPlacement) {
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const surface = surfaceFor(page);
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const declaredPlacement = String(raw.position || raw.placement || '').trim();
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placement = declaredPlacement || surface.placements[0];
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if (!surface.placements.includes(placement)) {
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errors.push(
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`Unsupported placement: ${placement} on ${page}. Supported placements: ${surface.placements.join(', ')}.`
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);
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return null;
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}
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}
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/* `data.source:` and a flat `source:` mean the same thing. The nested form
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groups options when a section grows; the flat form is what a one-section
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definition actually reads like, and refusing it would be the format being
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precious about punctuation. */
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const source = String(raw.data?.source ?? raw.source ?? '').trim();
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if (!source) {
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errors.push(`${at || `${where}.${id}`}: a section needs \`data.source\`.`);
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return null;
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}
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if (!SUPPORTED_DATA_SOURCES.includes(source)) {
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errors.push(
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`Unsupported data source: ${source}. Supported sources: ${SUPPORTED_DATA_SOURCES.join(', ')}.`
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);
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return null;
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}
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/* A source knows which shapes it can fill. Asking for a timeline of something
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that has no dates is an authoring mistake worth naming now rather than
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rendering as an empty panel later. */
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const definition = dataSourceFor(source);
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/* `shapeFor` is how a type that is not a drawn component is exempted: a
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summary is prose, so there is no shape for a source to be incompatible
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with. Every drawn type maps to itself. */
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const shape = shapeFor(type);
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if (shape && definition.shapes && !definition.shapes.includes(shape)) {
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errors.push(
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`${at || `${where}.${id}`}: \`${source}\` cannot be shown as \`${type}\`. It supports: ${definition.shapes.join(', ')}.`
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);
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return null;
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}
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const periods = Array.isArray(raw.periods) ? raw.periods.map((p) => String(p).trim()) : [];
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const unknownPeriod = periods.find((p) => !SUPPORTED_PERIODS.includes(p));
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if (unknownPeriod) {
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errors.push(
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`Unsupported period: ${unknownPeriod}. Supported periods: ${SUPPORTED_PERIODS.join(', ')}.`
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);
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return null;
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}
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const limit = Number(raw.limit);
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/**
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* Whether this section offers controls rather than a read-out.
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*
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* Two independent things must agree before anything is editable, and this is
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* the first: the definition asking for it, and the source declaring that it
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* can be written at all. The second is the page publishing a handler for that
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* source at render time. A definition asking to edit a reading the product
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* does not expose for writing is an authoring mistake worth naming here,
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* rather than a control that silently does nothing.
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*/
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const editable = raw.editable === true || raw.editable === 'true';
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if (editable && !isSourceWritable(source)) {
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errors.push(
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`${at || `${where}.${id}`}: \`${source}\` cannot be edited. It is a reading, not a setting.`
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);
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return null;
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}
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return {
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id,
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title: String(raw.title || '').trim() || null,
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description: String(raw.description || '').trim() || null,
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type,
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placement,
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source,
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/* Declared intent only. A section stays read-only wherever no page offers
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to accept the write — see `SkillSurface` and `SkillSectionBlock`. */
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editable,
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/* Context the page must supply for this source to resolve. */
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context: definition.context,
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periods,
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limit: Number.isFinite(limit) && limit > 0 ? Math.min(50, Math.round(limit)) : null,
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};
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}
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/**
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* The keys that mean "this object *is* a section".
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*
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* How the two shapes are told apart. A definition may write its UI either way:
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*
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* ui: ui:
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* type: flow positions:
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* placement: … sections:
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* source: … - type: flow
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*
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* The first is one section applying to every page the skill declares; the
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* second addresses pages by name and can differ per page. Both are legitimate,
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* and the difference is structural — an object carrying `type` or `source` is a
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* section, an object whose keys are page names is a page map. Nothing is
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* decided by a skill id, and neither shape is privileged.
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*/
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const SECTION_KEYS = new Set([
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'id', 'type', 'title', 'description', 'placement', 'position', 'data', 'source', 'periods',
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'limit', 'editable',
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]);
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const looksLikeSection = (value) =>
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Boolean(value)
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&& typeof value === 'object'
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&& !Array.isArray(value)
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&& Object.keys(value).some((key) => SECTION_KEYS.has(key));
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/** The sections a page entry declares, in either the list or single-section form. */
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function sectionsOf(config) {
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if (Array.isArray(config?.sections)) return config.sections;
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if (Array.isArray(config)) return config;
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if (looksLikeSection(config)) return [config];
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return null;
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}
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/**
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* The whole `ui:` block, normalized per page.
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*
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* Returns `{ ui, errors }`. `ui` holds only what validated, so a definition with
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* one bad section still registers its good ones — and the author still sees why
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* the other was refused.
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*/
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export function normalizeSkillUi(rawUi, { declaredPages = [], skillId = '' } = {}) {
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const errors = [];
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const ui = {};
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if (rawUi == null) return { ui, errors };
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if (typeof rawUi !== 'object' || Array.isArray(rawUi)) {
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return { ui, errors: ['`ui` must be a section, or a mapping of page names to sections.'] };
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}
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const pages = declaredPages.map(canonicalPage).filter(Boolean);
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/* Shorthand: one section, applied to every page the skill declares. The keys
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inside it are section options and are never read as page names — which is
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exactly what this branch exists to prevent. */
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if (looksLikeSection(rawUi)) {
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if (!pages.length) {
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return { ui, errors: ['`ui` is configured but the skill declares no `pages`.'] };
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}
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for (const page of pages) {
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const section = normalizeSection(rawUi, {
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page, errors, seen: new Set(), fallbackId: skillId,
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});
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if (section) ui[page] = { sections: [section] };
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}
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return { ui, errors };
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}
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/* Otherwise every key is a page name. */
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for (const [rawPage, config] of Object.entries(rawUi)) {
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const page = canonicalPage(rawPage);
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if (!page) {
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errors.push(
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`Unsupported page: ${rawPage}. Supported pages: ${SUPPORTED_SKILL_PAGES.join(', ')}.`
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);
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continue;
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}
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/* A page cannot be extended unless the skill also declares it. Otherwise a
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definition could render onto a surface it never said it applied to. */
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if (pages.length && !pages.includes(page)) {
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errors.push(`\`ui.${rawPage}\` is configured but \`${rawPage}\` is not listed under \`pages\`.`);
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continue;
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}
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const rawSections = sectionsOf(config);
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if (!rawSections) {
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errors.push(`ui.${rawPage}: expected a \`sections\` list, or a single section.`);
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continue;
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}
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const seen = new Set();
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const sections = rawSections
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.map((section) => normalizeSection(section, {
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page: rawPage, errors, seen, fallbackId: skillId,
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}))
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.filter(Boolean);
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if (sections.length) ui[page] = { sections };
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}
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return { ui, errors };
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}
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/** Every section this skill contributes to a page, in declaration order. */
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export const sectionsForPage = (skill, page) => {
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const key = canonicalPage(page);
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return key ? skill?.ui?.[key]?.sections || [] : [];
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};
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/** How many UI sections a definition registers, across every page. */
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export const countSections = (skill) =>
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Object.values(skill?.ui || {}).reduce((n, page) => n + (page.sections?.length || 0), 0);
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