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dictionaries.js
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dictionaries.js
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import { resolveValue } from "../../util.js";
import { parse, stringify, equals } from "../types.js";
function parseEntries (value, { values, keys, separator = ", ", defaultValue = true, defaultKey } = {}) {
let entries;
if (!Array.isArray(entries)) {
separator = separator.trim();
let entrySeparatorRegex = RegExp(`\\s*(?<!\\\\)${separator}\\s*`);
entries = value.trim().split(entrySeparatorRegex);
entries = entries.map((entry, index) => {
let parts = entry.split(/(?<!\\):/);
let key, value;
if (parts.length >= 2) {
// Value contains colons
key = parts.shift();
value = parts.join(":");
}
else if (parts.length === 1) {
if (defaultKey) {
value = parts[0];
key = resolveValue(defaultKey, [null, value, index]);
}
else {
key = parts[0];
value = resolveValue(defaultValue, [null, key, index]);
}
}
[key, value] = [key, value].map(v => v?.trim?.() ?? v);
if (value === "false") {
value = false;
}
return [key, value];
});
}
entries = entries.map(([key, value]) => {
if (keys) {
key = parse(key, keys);
}
if (values) {
value = parse(value, values);
}
return [key, value];
});
return entries;
}
export const object = {
type: Object,
equals (a, b, { values } = {}) {
let aKeys = Object.keys(a);
let bKeys = Object.keys(b);
if (aKeys.length !== bKeys.length) {
return false;
}
return aKeys.every(key => equals(a[key], b[key], values));
},
/**
* Parses a simple microsyntax for declaring key-value options:
* If no value is provided, it becomes `true`. The string "false" is parsed as `false`.
* Escapes for separators are supported, via backslash.
* @param {string} value
* @param {Object} [options]
* @param {Function} [options.values] The type to parse the values as
* @param {string} [options.separator=","] The separator between entries.
*/
parse (value, options = {}) {
let entries;
if (value instanceof Map) {
value = value.entries();
}
else if (typeof value === "object") {
if (options.values) {
for (let key in value) {
value[key] = parse(value[key], options.values);
}
}
return value;
}
entries = parseEntries(value, options);
return Object.fromEntries(entries);
},
stringify (value, { values, separator = ", " } = {}) {
let entries = Object.entries(value);
if (values) {
entries = entries.map(([key, value]) => [key, stringify(value, values)]);
}
return entries.map(([key, value]) => `${key}: ${value}`).join(separator);
},
};
export const map = {
type: Map,
equals (a, b, { values } = {}) {
let aKeys = a.keys();
let bKeys = b.keys();
if (aKeys.length !== bKeys.length) {
return false;
}
return aKeys.every(key => equals(a.get(key), b.get(key), values));
},
/**
* Parses a simple microsyntax for declaring key-value options:
* If no value is provided, it becomes `true`. The string "false" is parsed as `false`.
* Escapes for separators are supported, via backslash.
* @param {string} value
* @param {Object} [options]
* @param {Function} [options.keys] The type to parse the keys as
* @param {Function} [options.values] The type to parse the values as
* @param {string} [options.separator=","] The separator between entries.
*/
parse (value, options) {
let entries;
if (value instanceof Map) {
if (options) {
let { keys, values } = options;
if (keys || values) {
for (let [key, value] of value) {
value.delete(key);
value.set(parse(key, keys), parse(value, values));
}
}
}
return value;
}
else if (typeof value === "object") {
value = Object.entries(value);
}
entries = parseEntries(value, options);
return Array.isArray(entries) ? new Map(entries) : entries;
},
stringify (value, { keys, values, separator = ", " } = {}) {
let entries = value.entries();
if (keys || values) {
entries = entries.map(([key, value]) => [stringify(key, keys), stringify(value, values)]);
}
return entries.map(([key, value]) => `${key}: ${value}`).join(separator);
},
};