@aws-cdk/core
Version:
AWS Cloud Development Kit Core Library
104 lines • 11 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", { value: true });
const token_1 = require("./token");
/**
* Fragments of a concatenated string containing stringified Tokens
*/
class TokenizedStringFragments {
constructor() {
this.fragments = new Array();
}
get firstToken() {
const first = this.fragments[0];
if (first.type === 'token') {
return first.token;
}
return undefined;
}
get firstValue() {
return fragmentValue(this.fragments[0]);
}
get length() {
return this.fragments.length;
}
addLiteral(lit) {
this.fragments.push({ type: 'literal', lit });
}
addToken(token) {
this.fragments.push({ type: 'token', token });
}
addIntrinsic(value) {
this.fragments.push({ type: 'intrinsic', value });
}
/**
* Return all Tokens from this string
*/
get tokens() {
const ret = new Array();
for (const f of this.fragments) {
if (f.type === 'token') {
ret.push(f.token);
}
}
return ret;
}
/**
* Apply a transformation function to all tokens in the string
*/
mapTokens(mapper) {
const ret = new TokenizedStringFragments();
for (const f of this.fragments) {
switch (f.type) {
case 'literal':
ret.addLiteral(f.lit);
break;
case 'token':
const mapped = mapper.mapToken(f.token);
if (token_1.isResolvableObject(mapped)) {
ret.addToken(mapped);
}
else {
ret.addIntrinsic(mapped);
}
break;
case 'intrinsic':
ret.addIntrinsic(f.value);
break;
}
}
return ret;
}
/**
* Combine the string fragments using the given joiner.
*
* If there are any
*/
join(concat) {
if (this.fragments.length === 0) {
return concat.join(undefined, undefined);
}
if (this.fragments.length === 1) {
return this.firstValue;
}
const values = this.fragments.map(fragmentValue);
while (values.length > 1) {
const prefix = values.splice(0, 2);
values.splice(0, 0, concat.join(prefix[0], prefix[1]));
}
return values[0];
}
}
exports.TokenizedStringFragments = TokenizedStringFragments;
/**
* Resolve the value from a single fragment
*
* If the fragment is a Token, return the string encoding of the Token.
*/
function fragmentValue(fragment) {
switch (fragment.type) {
case 'literal': return fragment.lit;
case 'token': return fragment.token.toString();
case 'intrinsic': return fragment.value;
}
}
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lit: any; };\ntype TokenFragment = { type: 'token'; token: IResolvable; };\ntype IntrinsicFragment = { type: 'intrinsic'; value: any; };\ntype Fragment =  LiteralFragment | TokenFragment | IntrinsicFragment;\n\n/**\n * Fragments of a concatenated string containing stringified Tokens\n */\nexport class TokenizedStringFragments {\n  private readonly fragments = new Array<Fragment>();\n\n  public get firstToken(): IResolvable | undefined {\n    const first = this.fragments[0];\n    if (first.type === 'token') { return first.token; }\n    return undefined;\n  }\n\n  public get firstValue(): any {\n    return fragmentValue(this.fragments[0]);\n  }\n\n  public get length() {\n    return this.fragments.length;\n  }\n\n  public addLiteral(lit: any) {\n    this.fragments.push({ type: 'literal', lit });\n  }\n\n  public addToken(token: IResolvable) {\n    this.fragments.push({ type: 'token', token });\n  }\n\n  public addIntrinsic(value: any) {\n    this.fragments.push({ type: 'intrinsic', value });\n  }\n\n  /**\n   * Return all Tokens from this string\n   */\n  public get tokens(): IResolvable[] {\n    const ret = new Array<IResolvable>();\n    for (const f of this.fragments) {\n      if (f.type === 'token') {\n        ret.push(f.token);\n      }\n    }\n    return ret;\n  }\n\n  /**\n   * Apply a transformation function to all tokens in the string\n   */\n  public mapTokens(mapper: ITokenMapper): TokenizedStringFragments {\n    const ret = new TokenizedStringFragments();\n\n    for (const f of this.fragments) {\n      switch (f.type) {\n        case 'literal':\n          ret.addLiteral(f.lit);\n          break;\n        case 'token':\n          const mapped = mapper.mapToken(f.token);\n          if (isResolvableObject(mapped)) {\n            ret.addToken(mapped);\n          } else {\n            ret.addIntrinsic(mapped);\n          }\n          break;\n        case 'intrinsic':\n          ret.addIntrinsic(f.value);\n          break;\n      }\n    }\n\n    return ret;\n  }\n\n  /**\n   * Combine the string fragments using the given joiner.\n   *\n   * If there are any\n   */\n  public join(concat: IFragmentConcatenator): any {\n    if (this.fragments.length === 0) { return concat.join(undefined, undefined); }\n    if (this.fragments.length === 1) { return this.firstValue; }\n\n    const values = this.fragments.map(fragmentValue);\n\n    while (values.length > 1) {\n      const prefix = values.splice(0, 2);\n      values.splice(0, 0, concat.join(prefix[0], prefix[1]));\n    }\n\n    return values[0];\n  }\n}\n\n/**\n * Interface to apply operation to tokens in a string\n *\n * Interface so it can be exported via jsii.\n */\nexport interface ITokenMapper {\n  /**\n   * Replace a single token\n   */\n  mapToken(t: IResolvable): any;\n}\n\n/**\n * Resolve the value from a single fragment\n *\n * If the fragment is a Token, return the string encoding of the Token.\n */\nfunction fragmentValue(fragment: Fragment): any {\n  switch (fragment.type) {\n    case 'literal': return fragment.lit;\n    case 'token': return fragment.token.toString();\n    case 'intrinsic': return fragment.value;\n  }\n}\n"]}