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// Helpers common to #find and #reverse logic.
import thingConstructors from '#things';
export function getAllSpecs({
word,
constructorKey,
hardcodedSpecs,
postprocessSpec,
}) {
try {
thingConstructors;
} catch (error) {
throw new Error(`Thing constructors aren't ready yet, can't get all ${word} specs`);
}
const specs = {...hardcodedSpecs};
for (const thingConstructor of Object.values(thingConstructors)) {
const thingSpecs = thingConstructor[constructorKey];
if (!thingSpecs) continue;
for (const [key, spec] of Object.entries(thingSpecs)) {
specs[key] =
postprocessSpec(spec, {
thingConstructor,
});
}
}
return specs;
}
export function findSpec(key, {
word,
constructorKey,
hardcodedSpecs,
postprocessSpec,
}) {
if (Object.hasOwn(hardcodedSpecs, key)) {
return hardcodedSpecs[key];
}
try {
thingConstructors;
} catch (error) {
throw new Error(`Thing constructors aren't ready yet, can't check if "${word}.${key}" available`);
}
for (const thingConstructor of Object.values(thingConstructors)) {
const thingSpecs = thingConstructor[constructorKey];
if (!thingSpecs) continue;
if (Object.hasOwn(thingSpecs, key)) {
return postprocessSpec(thingSpecs[key], {
thingConstructor,
});
}
}
throw new Error(`"${word}.${key}" isn't available`);
}
export function tokenProxy({
findSpec,
prepareBehavior,
handle: customHandle =
(_key) => undefined,
}) {
return new Proxy({}, {
get: (store, key) => {
const custom = customHandle(key);
if (custom !== undefined) {
return custom;
}
if (!Object.hasOwn(store, key)) {
let behavior = (...args) => {
// This will error if the spec isn't available...
const spec = findSpec(key);
// ...or, if it is available, replace this function with the
// ready-for-use find function made out of that spec.
return (behavior = prepareBehavior(spec))(...args);
};
store[key] = (...args) => behavior(...args);
store[key][tokenKey] = key;
}
return store[key];
},
});
}
export const tokenKey = Symbol.for('find.tokenKey');
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