std/yaml/stringify.ts

119 lines
3.2 KiB
TypeScript

// Ported from js-yaml v3.13.1:
// https://github.com/nodeca/js-yaml/commit/665aadda42349dcae869f12040d9b10ef18d12da
// Copyright 2011-2015 by Vitaly Puzrin. All rights reserved. MIT license.
// Copyright 2018-2024 the Deno authors. All rights reserved. MIT license.
// This module is browser compatible.
import { DumperState } from "./_dumper_state.ts";
import { SCHEMA_MAP, type SchemaType } from "./_schema.ts";
import type { StyleVariant } from "./_type.ts";
export type { SchemaType, StyleVariant };
/** Options for {@linkcode stringify}. */
export type StringifyOptions = {
/**
* Indentation width to use (in spaces).
*
* @default {2}
*/
indent?: number;
/**
* When true, adds an indentation level to array elements.
*
* @default {true}
*/
arrayIndent?: boolean;
/**
* Do not throw on invalid types (like function in the safe schema) and skip
* pairs and single values with such types.
*
* @default {false}
*/
skipInvalid?: boolean;
/**
* Specifies level of nesting, when to switch from block to flow style for
* collections. `-1` means block style everywhere.
*
* @default {-1}
*/
flowLevel?: number;
/** Each tag may have own set of styles. - "tag" => "style" map. */
styles?: Record<string, StyleVariant>;
/**
* Name of the schema to use.
*
* @default {"default"}
*/
schema?: SchemaType;
/**
* If true, sort keys when dumping YAML in ascending, ASCII character order.
* If a function, use the function to sort the keys.
* If a function is specified, the function must return a negative value
* if first argument is less than second argument, zero if they're equal
* and a positive value otherwise.
*
* @default {false}
*/
sortKeys?: boolean | ((a: string, b: string) => number);
/**
* Set max line width.
*
* @default {80}
*/
lineWidth?: number;
/**
* If false, don't convert duplicate objects into references.
*
* @default {true}
*/
useAnchors?: boolean;
/**
* If false don't try to be compatible with older yaml versions.
* Currently: don't quote "yes", "no" and so on,
* as required for YAML 1.1.
*
* @default {true}
*/
compatMode?: boolean;
/**
* If true flow sequences will be condensed, omitting the
* space between `key: value` or `a, b`. Eg. `'[a,b]'` or `{a:{b:c}}`.
* Can be useful when using yaml for pretty URL query params
* as spaces are %-encoded.
*
* @default {false}
*/
condenseFlow?: boolean;
};
/**
* Converts a JavaScript object or value to a YAML document string.
*
* @example Usage
* ```ts
* import { stringify } from "@std/yaml/stringify";
* import { assertEquals } from "@std/assert";
*
* const data = { id: 1, name: "Alice" };
* const yaml = stringify(data);
*
* assertEquals(yaml, "id: 1\nname: Alice\n");
* ```
*
* @throws {TypeError} If `data` contains invalid types.
* @param data The data to serialize.
* @param options The options for serialization.
* @returns A YAML string.
*/
export function stringify(
data: unknown,
options: StringifyOptions = {},
): string {
const state = new DumperState({
...options,
schema: SCHEMA_MAP.get(options.schema!)!,
});
return state.stringify(data);
}