@aws-cdk/core
Version:
AWS Cloud Development Kit Core Library
207 lines • 22.7 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", { value: true });
exports.withResolved = exports.isResolvableObject = exports.Tokenization = exports.Token = exports.TokenComparison = void 0;
const lazy_1 = require("./lazy");
const encoding_1 = require("./private/encoding");
const intrinsic_1 = require("./private/intrinsic");
const resolve_1 = require("./private/resolve");
const token_map_1 = require("./private/token-map");
/**
* An enum-like class that represents the result of comparing two Tokens.
*
* The return type of {@link Token.compareStrings}.
*/
class TokenComparison {
constructor() {
}
}
exports.TokenComparison = TokenComparison;
/**
* This means we're certain the two components are NOT Tokens, and identical.
*/
TokenComparison.SAME = new TokenComparison();
/**
* This means we're certain the two components are NOT Tokens, and different.
*/
TokenComparison.DIFFERENT = new TokenComparison();
/**
* This means exactly one of the components is a Token.
*/
TokenComparison.ONE_UNRESOLVED = new TokenComparison();
/**
* This means both components are Tokens.
*/
TokenComparison.BOTH_UNRESOLVED = new TokenComparison();
/**
* Represents a special or lazily-evaluated value.
*
* Can be used to delay evaluation of a certain value in case, for example,
* that it requires some context or late-bound data. Can also be used to
* mark values that need special processing at document rendering time.
*
* Tokens can be embedded into strings while retaining their original
* semantics.
*/
class Token {
/**
* Returns true if obj represents an unresolved value.
*
* One of these must be true:
*
* - `obj` is an IResolvable
* - `obj` is a string containing at least one encoded `IResolvable`
* - `obj` is either an encoded number or list
*
* This does NOT recurse into lists or objects to see if they
* containing resolvables.
*
* @param obj The object to test.
*/
static isUnresolved(obj) {
return encoding_1.unresolved(obj);
}
/**
* Return a reversible string representation of this token.
*
* If the Token is initialized with a literal, the stringified value of the
* literal is returned. Otherwise, a special quoted string representation
* of the Token is returned that can be embedded into other strings.
*
* Strings with quoted Tokens in them can be restored back into
* complex values with the Tokens restored by calling `resolve()`
* on the string.
*/
static asString(value, options = {}) {
if (typeof value === 'string') {
return value;
}
return token_map_1.TokenMap.instance().registerString(Token.asAny(value), options.displayHint);
}
/**
* Return a reversible number representation of this token.
*/
static asNumber(value) {
if (typeof value === 'number') {
return value;
}
return token_map_1.TokenMap.instance().registerNumber(Token.asAny(value));
}
/**
* Return a reversible list representation of this token.
*/
static asList(value, options = {}) {
if (Array.isArray(value) && value.every(x => typeof x === 'string')) {
return value;
}
return token_map_1.TokenMap.instance().registerList(Token.asAny(value), options.displayHint);
}
/**
* Return a resolvable representation of the given value.
*/
static asAny(value) {
return isResolvableObject(value) ? value : new intrinsic_1.Intrinsic(value);
}
/**
* Compare two strings that might contain Tokens with each other.
*/
static compareStrings(possibleToken1, possibleToken2) {
const firstIsUnresolved = Token.isUnresolved(possibleToken1);
const secondIsUnresolved = Token.isUnresolved(possibleToken2);
if (firstIsUnresolved && secondIsUnresolved) {
return TokenComparison.BOTH_UNRESOLVED;
}
if (firstIsUnresolved || secondIsUnresolved) {
return TokenComparison.ONE_UNRESOLVED;
}
return possibleToken1 === possibleToken2 ? TokenComparison.SAME : TokenComparison.DIFFERENT;
}
constructor() {
}
}
exports.Token = Token;
/**
* Less oft-needed functions to manipulate Tokens.
*/
class Tokenization {
/**
* Un-encode a string potentially containing encoded tokens.
*/
static reverseString(s) {
return token_map_1.TokenMap.instance().splitString(s);
}
/**
* Un-encode a Tokenized value from a number.
*/
static reverseNumber(n) {
return token_map_1.TokenMap.instance().lookupNumberToken(n);
}
/**
* Un-encode a Tokenized value from a list.
*/
static reverseList(l) {
return token_map_1.TokenMap.instance().lookupList(l);
}
/**
* Resolves an object by evaluating all tokens and removing any undefined or empty objects or arrays.
*
* Values can only be primitives, arrays or tokens. Other objects (i.e. with methods) will be rejected.
*
* @param obj The object to resolve.
* @param options Prefix key path components for diagnostics.
*/
static resolve(obj, options) {
return resolve_1.resolve(obj, {
scope: options.scope,
resolver: options.resolver,
preparing: (options.preparing !== undefined ? options.preparing : false),
});
}
/**
* Return whether the given object is an IResolvable object.
*
* This is different from Token.isUnresolved() which will also check for
* encoded Tokens, whereas this method will only do a type check on the given
* object.
*/
static isResolvable(obj) {
return isResolvableObject(obj);
}
/**
* Stringify a number directly or lazily if it's a Token.
*
* If it is an object (i.e., { Ref: 'SomeLogicalId' }), return it as-is.
*/
static stringifyNumber(x) {
// only convert numbers to strings so that Refs, conditions, and other things don't end up synthesizing as [object object]
if (Token.isUnresolved(x)) {
return lazy_1.Lazy.stringValue({
produce: context => {
const resolved = context.resolve(x);
return typeof resolved !== 'number' ? resolved : `${resolved}`;
},
});
}
else {
return typeof x !== 'number' ? x : `${x}`;
}
}
constructor() {
}
}
exports.Tokenization = Tokenization;
function isResolvableObject(x) {
return typeof (x) === 'object' && x !== null && typeof x.resolve === 'function';
}
exports.isResolvableObject = isResolvableObject;
function withResolved(...args) {
if (args.length < 2) {
return;
}
const argArray = args.slice(0, args.length - 1);
if (argArray.some(Token.isUnresolved)) {
return;
}
args[args.length - 1].apply(arguments, argArray);
}
exports.withResolved = withResolved;
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{ IConstruct } from 'constructs';\nimport { Lazy } from './lazy';\nimport { unresolved } from './private/encoding';\nimport { Intrinsic } from './private/intrinsic';\nimport { resolve } from './private/resolve';\nimport { TokenMap } from './private/token-map';\nimport { IResolvable, ITokenResolver } from './resolvable';\nimport { TokenizedStringFragments } from './string-fragments';\n\n                                                                                                                                     \nexport class TokenComparison {\n                                                                                                \n  public static readonly SAME = new TokenComparison();\n\n                                                                                                \n  public static readonly DIFFERENT = new TokenComparison();\n\n                                                             \n  public static readonly ONE_UNRESOLVED = new TokenComparison();\n\n                                               \n  public static readonly BOTH_UNRESOLVED = new TokenComparison();\n\n  private constructor() {\n  }\n}\n\n                                                                                                                                                                                                                                                                                                                                                                                 \nexport class Token {\n                                                                                                                                                                                                                                                                                                                                                                                                               \n  public static isUnresolved(obj: any): boolean {\n    return unresolved(obj);\n  }\n\n                                                                                                                                                                                                                                                                                                                                                                                                                                                                             \n  public static asString(value: any, options: EncodingOptions = {}): string {\n    if (typeof value === 'string') { return value; }\n    return TokenMap.instance().registerString(Token.asAny(value), options.displayHint);\n  }\n\n                                                                        \n  public static asNumber(value: any): number {\n    if (typeof value === 'number') { return value; }\n    return TokenMap.instance().registerNumber(Token.asAny(value));\n  }\n\n                                                                      \n  public static asList(value: any, options: EncodingOptions = {}): string[] {\n    if (Array.isArray(value) && value.every(x => typeof x === 'string')) { return value; }\n    return TokenMap.instance().registerList(Token.asAny(value), options.displayHint);\n  }\n\n                                                                      \n  public static asAny(value: any): IResolvable {\n    return isResolvableObject(value) ? value : new Intrinsic(value);\n  }\n\n                                                                       \n  public static compareStrings(possibleToken1: string, possibleToken2: string): TokenComparison {\n    const firstIsUnresolved = Token.isUnresolved(possibleToken1);\n    const secondIsUnresolved = Token.isUnresolved(possibleToken2);\n\n    if (firstIsUnresolved && secondIsUnresolved) {\n      return TokenComparison.BOTH_UNRESOLVED;\n    }\n    if (firstIsUnresolved || secondIsUnresolved) {\n      return TokenComparison.ONE_UNRESOLVED;\n    }\n\n    return possibleToken1 === possibleToken2 ? TokenComparison.SAME : TokenComparison.DIFFERENT;\n  }\n\n  private constructor() {\n  }\n}\n\n                                                         \nexport class Tokenization {\n                                                                         \n  public static reverseString(s: string): TokenizedStringFragments {\n    return TokenMap.instance().splitString(s);\n  }\n\n                                                          \n  public static reverseNumber(n: number): IResolvable | undefined {\n    return TokenMap.instance().lookupNumberToken(n);\n  }\n\n                                                        \n  public static reverseList(l: string[]): IResolvable | undefined {\n    return TokenMap.instance().lookupList(l);\n  }\n\n                                                                                                                                                                                                                                                                                                                                         \n  public static resolve(obj: any, options: ResolveOptions): any {\n    return resolve(obj, {\n      scope: options.scope,\n      resolver: options.resolver,\n      preparing: (options.preparing !== undefined ? options.preparing : false),\n    });\n  }\n\n                                                                                                                                                                                                                                                      \n  public static isResolvable(obj: any): obj is IResolvable {\n    return isResolvableObject(obj);\n  }\n\n                                                                                                                                             \n  public static stringifyNumber(x: number) {\n    // only convert numbers to strings so that Refs, conditions, and other things don't end up synthesizing as [object object]\n\n    if (Token.isUnresolved(x)) {\n      return Lazy.stringValue({\n        produce: context => {\n          const resolved = context.resolve(x);\n          return typeof resolved !== 'number' ? resolved : `${resolved}`;\n        },\n      });\n    } else {\n      return typeof x !== 'number' ? x : `${x}`;\n    }\n  }\n\n  private constructor() {\n  }\n}\n\n                                                                                                                                                                                                                                                                                                 \nexport interface ResolveOptions {\n                                                             \n  readonly scope: IConstruct;\n\n                                                                     \n  readonly resolver: ITokenResolver;\n\n                                                                                                              \n  readonly preparing?: boolean;\n}\n\n                                         \nexport interface EncodingOptions {\n                                                                    \n  readonly displayHint?: string;\n}\n\nexport function isResolvableObject(x: any): x is IResolvable {\n  return typeof(x) === 'object' && x !== null && typeof x.resolve === 'function';\n}\n\n/**\n * Call the given function only if all given values are resolved\n *\n * Exported as a function since it will be used by TypeScript modules, but\n * can't be exposed via JSII because of the generics.\n */\nexport function withResolved<A>(a: A, fn: (a: A) => void): void;\nexport function withResolved<A, B>(a: A, b: B, fn: (a: A, b: B) => void): void;\nexport function withResolved<A, B, C>(a: A, b: B, c: C, fn: (a: A, b: B, c: C) => void): void;\nexport function withResolved(...args: any[]) {\n  if (args.length < 2) { return; }\n  const argArray = args.slice(0, args.length - 1);\n  if (argArray.some(Token.isUnresolved)) { return; }\n  args[args.length - 1].apply(arguments, argArray);\n}\n"]}