import type {FuncKeywordDefinition, AnySchemaObject} from "ajv"
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import equal = require("fast-deep-equal")
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const SCALAR_TYPES = ["number", "integer", "string", "boolean", "null"]
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export default function getDef(): FuncKeywordDefinition {
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return {
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keyword: "uniqueItemProperties",
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type: "array",
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schemaType: "array",
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compile(keys: string[], parentSchema: AnySchemaObject) {
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const scalar = getScalarKeys(keys, parentSchema)
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return (data) => {
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if (data.length <= 1) return true
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for (let k = 0; k < keys.length; k++) {
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const key = keys[k]
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if (scalar[k]) {
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const hash: Record<string, any> = {}
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for (const x of data) {
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if (!x || typeof x != "object") continue
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let p = x[key]
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if (p && typeof p == "object") continue
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if (typeof p == "string") p = '"' + p
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if (hash[p]) return false
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hash[p] = true
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}
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} else {
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for (let i = data.length; i--; ) {
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const x = data[i]
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if (!x || typeof x != "object") continue
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for (let j = i; j--; ) {
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const y = data[j]
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if (y && typeof y == "object" && equal(x[key], y[key])) return false
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}
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}
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}
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}
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return true
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}
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},
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metaSchema: {
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type: "array",
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items: {type: "string"},
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},
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}
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}
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function getScalarKeys(keys: string[], schema: AnySchemaObject): boolean[] {
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return keys.map((key) => {
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const t = schema.items?.properties?.[key]?.type
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return Array.isArray(t)
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? !t.includes("object") && !t.includes("array")
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: SCALAR_TYPES.includes(t)
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})
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}
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module.exports = getDef
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