entity.ts

entity.ts

namespace $ {

	const str = () => ('00000000000000000' + (Math.random() * 0xffffffffffffffff).toString(16)).slice(-16)

	export class $gd_kit_entity extends $mol_object {
		constructor(id?: string) {
			super()
			if (id) this.id = $mol_const(id)
		}

		// p-ка свойства-объекта
		@ $mol_mem
		id(): string {
			throw new Error('setup')
		}

		protected static create_uuid() {
			const a = str()
			const b = str()
			return a.slice(0, 8) + '-' + a.slice(8, 12) + '-4' + a.slice(13) + '-a' + b.slice(1, 4) + '-' + b.slice(4)	  
		}

		@ $mol_action
		static create_id(group = ''): string {
			const is_secure = this.$.$mol_dom_context.isSecureContext
			return is_secure ? this.$.$mol_crypto_uuid() : this.create_uuid()
		}

		@ $mol_action
		static created_at(group = '') {
			return new Date().toISOString()
		}

		@ $mol_mem
		data( patch?: {} | undefined | null) {
			return {} as {} | null
		}

		@ $mol_mem
		protected draft(next?: ReturnType<typeof this.data> | null) {
			return next ?? null
		}

		@ $mol_mem_key
		value<
			Field extends keyof NonNullable<ReturnType< this['data'] >>
		>(
			field: Field,
			value?: NonNullable<ReturnType< this['data'] >>[ Field ] | null,
		): NonNullable<ReturnType< this['data'] >>[ Field ] | null | undefined {
			const data = this.draft() ?? this.data()

			if (value === undefined) return data?.[field as never]
			const next = { ...data, [ field ]: value }
			this.draft(next)

			try {
				const result = this.data( next )?.[ field as never ]
				this.draft(null)
				return result
			} catch (e) {
				if (e instanceof Error) this.draft(null)
				$mol_fail_hidden(e)
			}
		}

		@ $mol_mem
		title(next?: string | null) {
			return next
		}

		@ $mol_mem
		created_at(next?: $mol_time_moment | string) {
			return next ?? new this.$.$mol_time_moment
		}
	}
}