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{ OPERATION } from \"../../encoding/spec\";\nimport { registerType } from \"../registry\";\nimport { $changes, $childType, $decoder, $deleteByIndex, $encoder, $filter, $getByIndex, $onEncodeEnd } from \"../symbols\";\nimport { Collection } from \"../HelperTypes\";\nimport { ChangeTree, type IRef } from \"../../encoder/ChangeTree\";\nimport { encodeKeyValueOperation } from \"../../encoder/EncodeOperation\";\nimport { decodeKeyValueOperation } from \"../../decoder/DecodeOperation\";\nimport type { StateView } from \"../../encoder/StateView\";\nimport type { Schema } from \"../../Schema\";\n\nexport class SetSchema<V=any> implements Collection<number, V>, IRef {\n    [$changes]: ChangeTree;\n    protected [$childType]: string | typeof Schema;\n\n    protected $items: Map<number, V> = new Map<number, V>();\n    protected $indexes: Map<number, number> = new Map<number, number>();\n    protected deletedItems: { [field: string]: V } = {};\n\n    protected $refId: number = 0;\n\n    static [$encoder] = encodeKeyValueOperation;\n    static [$decoder] = decodeKeyValueOperation;\n\n    /**\n     * Determine if a property must be filtered.\n     * - If returns false, the property is NOT going to be encoded.\n     * - If returns true, the property is going to be encoded.\n     *\n     * Encoding with \"filters\" happens in two steps:\n     * - First, the encoder iterates over all \"not owned\" properties and encodes them.\n     * - Then, the encoder iterates over all \"owned\" properties per instance and encodes them.\n     */\n    static [$filter] (ref: SetSchema, index: number, view: StateView) {\n        return (\n            !view ||\n            typeof (ref[$childType]) === \"string\" ||\n            view.visible.has((ref[$getByIndex](index) ?? ref.deletedItems[index])[$changes])\n        );\n    }\n\n    static is(type: any) {\n        return type['set'] !== undefined;\n    }\n\n    constructor (initialValues?: Array<V>) {\n        this[$changes] = new ChangeTree(this);\n        this[$changes].indexes = {};\n\n        if (initialValues) {\n            initialValues.forEach((v) => this.add(v));\n        }\n\n        Object.defineProperty(this, $childType, {\n            value: undefined,\n            enumerable: false,\n            writable: true,\n            configurable: true,\n        });\n    }\n\n    add(value: V) {\n        // immediatelly return false if value already added.\n        if (this.has(value)) { return false; }\n\n        // set \"index\" for reference.\n        const index = this.$refId++;\n\n        if ((value[$changes]) !== undefined) {\n            value[$changes].setParent(this, this[$changes].root, index);\n        }\n\n        const operation = this[$changes].indexes[index]?.op ?? OPERATION.ADD;\n\n        this[$changes].indexes[index] = index;\n\n        this.$indexes.set(index, index);\n        this.$items.set(index, value);\n\n        this[$changes].change(index, operation);\n        return index;\n    }\n\n    entries () {\n        return this.$items.entries();\n    }\n\n    delete(item: V) {\n        const entries = this.$items.entries();\n\n        let index: number;\n        let entry: IteratorResult<[number, V]>;\n        while (entry = entries.next()) {\n            if (entry.done) { break; }\n\n            if (item === entry.value[1]) {\n                index = entry.value[0];\n                break;\n            }\n        }\n\n        if (index === undefined) {\n            return false;\n        }\n\n        this.deletedItems[index] = this[$changes].delete(index);\n        this.$indexes.delete(index);\n\n        return this.$items.delete(index);\n    }\n\n    clear() {\n        const changeTree = this[$changes];\n\n        // discard previous operations.\n        changeTree.discard(true);\n        changeTree.indexes = {};\n\n        // clear previous indexes\n        this.$indexes.clear();\n\n        // clear items\n        this.$items.clear();\n\n        changeTree.operation(OPERATION.CLEAR);\n    }\n\n    has (value: V): boolean {\n        const values = this.$items.values();\n\n        let has = false;\n        let entry: IteratorResult<V>;\n\n        while (entry = values.next()) {\n            if (entry.done) { break; }\n            if (value === entry.value) {\n                has = true;\n                break;\n            }\n        }\n\n        return has;\n    }\n\n    forEach(callbackfn: (value: V, key: number, collection: SetSchema<V>) => void) {\n        this.$items.forEach((value, key, _) => callbackfn(value, key, this));\n    }\n\n    values() {\n        return this.$items.values();\n    }\n\n    get size () {\n        return this.$items.size;\n    }\n\n    /** Iterator */\n    [Symbol.iterator](): IterableIterator<V> {\n        return this.$items.values();\n    }\n\n    protected setIndex(index: number, key: number) {\n        this.$indexes.set(index, key);\n    }\n\n    protected getIndex(index: number) {\n        return this.$indexes.get(index);\n    }\n\n    [$getByIndex](index: number): any {\n        return this.$items.get(this.$indexes.get(index));\n    }\n\n    [$deleteByIndex](index: number): void {\n        const key = this.$indexes.get(index);\n        this.$items.delete(key);\n        this.$indexes.delete(index);\n    }\n\n    protected [$onEncodeEnd]() {\n        this.deletedItems = {};\n    }\n\n    toArray() {\n        return Array.from(this.$items.values());\n    }\n\n    toJSON() {\n        const values: V[] = [];\n\n        this.forEach((value: any, key: number) => {\n            values.push(\n                (typeof (value['toJSON']) === \"function\")\n                    ? value['toJSON']()\n                    : value\n            );\n        });\n\n        return values;\n    }\n\n    //\n    // Decoding utilities\n    //\n    clone(isDecoding?: boolean): SetSchema<V> {\n        let cloned: SetSchema;\n\n        if (isDecoding) {\n            // client-side\n            cloned = Object.assign(new SetSchema(), this);\n\n        } else {\n            // server-side\n            cloned = new SetSchema();\n            this.forEach((value: any) => {\n                if (value[$changes]) {\n                    cloned.add(value['clone']());\n                } else {\n                    cloned.add(value);\n                }\n            })\n        }\n\n        return cloned;\n    }\n\n}\n\nregisterType(\"set\", { constructor: SetSchema });"]}