54 lines
1.6 KiB
JavaScript
54 lines
1.6 KiB
JavaScript
/**
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* Property helper functions.
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*
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* @_subsection api/utils:Properties [about-properties]
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*/
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function checkType(value, type, name) {
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const types = type.split("|").map(t => t.trim());
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for (let i = 0; i < types.length; i++) {
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switch (type) {
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case "any":
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return;
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case "bigint":
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case "boolean":
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case "number":
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case "string":
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if (typeof (value) === type) {
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return;
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}
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}
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}
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const error = new Error(`invalid value for type ${type}`);
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error.code = "INVALID_ARGUMENT";
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error.argument = `value.${name}`;
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error.value = value;
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throw error;
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}
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/**
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* Resolves to a new object that is a copy of %%value%%, but with all
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* values resolved.
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*/
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export async function resolveProperties(value) {
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const keys = Object.keys(value);
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const results = await Promise.all(keys.map((k) => Promise.resolve(value[k])));
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return results.reduce((accum, v, index) => {
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accum[keys[index]] = v;
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return accum;
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}, {});
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}
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/**
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* Assigns the %%values%% to %%target%% as read-only values.
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*
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* It %%types%% is specified, the values are checked.
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*/
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export function defineProperties(target, values, types) {
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for (let key in values) {
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let value = values[key];
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const type = (types ? types[key] : null);
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if (type) {
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checkType(value, type, key);
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}
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Object.defineProperty(target, key, { enumerable: true, value, writable: false });
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}
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}
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//# sourceMappingURL=properties.js.map
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