source: trip-planner-front/node_modules/lodash/fp/_baseConvert.js@ 571e0df

Last change on this file since 571e0df was 6a3a178, checked in by Ema <ema_spirova@…>, 3 years ago

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1var mapping = require('./_mapping'),
2 fallbackHolder = require('./placeholder');
3
4/** Built-in value reference. */
5var push = Array.prototype.push;
6
7/**
8 * Creates a function, with an arity of `n`, that invokes `func` with the
9 * arguments it receives.
10 *
11 * @private
12 * @param {Function} func The function to wrap.
13 * @param {number} n The arity of the new function.
14 * @returns {Function} Returns the new function.
15 */
16function baseArity(func, n) {
17 return n == 2
18 ? function(a, b) { return func.apply(undefined, arguments); }
19 : function(a) { return func.apply(undefined, arguments); };
20}
21
22/**
23 * Creates a function that invokes `func`, with up to `n` arguments, ignoring
24 * any additional arguments.
25 *
26 * @private
27 * @param {Function} func The function to cap arguments for.
28 * @param {number} n The arity cap.
29 * @returns {Function} Returns the new function.
30 */
31function baseAry(func, n) {
32 return n == 2
33 ? function(a, b) { return func(a, b); }
34 : function(a) { return func(a); };
35}
36
37/**
38 * Creates a clone of `array`.
39 *
40 * @private
41 * @param {Array} array The array to clone.
42 * @returns {Array} Returns the cloned array.
43 */
44function cloneArray(array) {
45 var length = array ? array.length : 0,
46 result = Array(length);
47
48 while (length--) {
49 result[length] = array[length];
50 }
51 return result;
52}
53
54/**
55 * Creates a function that clones a given object using the assignment `func`.
56 *
57 * @private
58 * @param {Function} func The assignment function.
59 * @returns {Function} Returns the new cloner function.
60 */
61function createCloner(func) {
62 return function(object) {
63 return func({}, object);
64 };
65}
66
67/**
68 * A specialized version of `_.spread` which flattens the spread array into
69 * the arguments of the invoked `func`.
70 *
71 * @private
72 * @param {Function} func The function to spread arguments over.
73 * @param {number} start The start position of the spread.
74 * @returns {Function} Returns the new function.
75 */
76function flatSpread(func, start) {
77 return function() {
78 var length = arguments.length,
79 lastIndex = length - 1,
80 args = Array(length);
81
82 while (length--) {
83 args[length] = arguments[length];
84 }
85 var array = args[start],
86 otherArgs = args.slice(0, start);
87
88 if (array) {
89 push.apply(otherArgs, array);
90 }
91 if (start != lastIndex) {
92 push.apply(otherArgs, args.slice(start + 1));
93 }
94 return func.apply(this, otherArgs);
95 };
96}
97
98/**
99 * Creates a function that wraps `func` and uses `cloner` to clone the first
100 * argument it receives.
101 *
102 * @private
103 * @param {Function} func The function to wrap.
104 * @param {Function} cloner The function to clone arguments.
105 * @returns {Function} Returns the new immutable function.
106 */
107function wrapImmutable(func, cloner) {
108 return function() {
109 var length = arguments.length;
110 if (!length) {
111 return;
112 }
113 var args = Array(length);
114 while (length--) {
115 args[length] = arguments[length];
116 }
117 var result = args[0] = cloner.apply(undefined, args);
118 func.apply(undefined, args);
119 return result;
120 };
121}
122
123/**
124 * The base implementation of `convert` which accepts a `util` object of methods
125 * required to perform conversions.
126 *
127 * @param {Object} util The util object.
128 * @param {string} name The name of the function to convert.
129 * @param {Function} func The function to convert.
130 * @param {Object} [options] The options object.
131 * @param {boolean} [options.cap=true] Specify capping iteratee arguments.
132 * @param {boolean} [options.curry=true] Specify currying.
133 * @param {boolean} [options.fixed=true] Specify fixed arity.
134 * @param {boolean} [options.immutable=true] Specify immutable operations.
135 * @param {boolean} [options.rearg=true] Specify rearranging arguments.
136 * @returns {Function|Object} Returns the converted function or object.
137 */
138function baseConvert(util, name, func, options) {
139 var isLib = typeof name == 'function',
140 isObj = name === Object(name);
141
142 if (isObj) {
143 options = func;
144 func = name;
145 name = undefined;
146 }
147 if (func == null) {
148 throw new TypeError;
149 }
150 options || (options = {});
151
152 var config = {
153 'cap': 'cap' in options ? options.cap : true,
154 'curry': 'curry' in options ? options.curry : true,
155 'fixed': 'fixed' in options ? options.fixed : true,
156 'immutable': 'immutable' in options ? options.immutable : true,
157 'rearg': 'rearg' in options ? options.rearg : true
158 };
159
160 var defaultHolder = isLib ? func : fallbackHolder,
161 forceCurry = ('curry' in options) && options.curry,
162 forceFixed = ('fixed' in options) && options.fixed,
163 forceRearg = ('rearg' in options) && options.rearg,
164 pristine = isLib ? func.runInContext() : undefined;
165
166 var helpers = isLib ? func : {
167 'ary': util.ary,
168 'assign': util.assign,
169 'clone': util.clone,
170 'curry': util.curry,
171 'forEach': util.forEach,
172 'isArray': util.isArray,
173 'isError': util.isError,
174 'isFunction': util.isFunction,
175 'isWeakMap': util.isWeakMap,
176 'iteratee': util.iteratee,
177 'keys': util.keys,
178 'rearg': util.rearg,
179 'toInteger': util.toInteger,
180 'toPath': util.toPath
181 };
182
183 var ary = helpers.ary,
184 assign = helpers.assign,
185 clone = helpers.clone,
186 curry = helpers.curry,
187 each = helpers.forEach,
188 isArray = helpers.isArray,
189 isError = helpers.isError,
190 isFunction = helpers.isFunction,
191 isWeakMap = helpers.isWeakMap,
192 keys = helpers.keys,
193 rearg = helpers.rearg,
194 toInteger = helpers.toInteger,
195 toPath = helpers.toPath;
196
197 var aryMethodKeys = keys(mapping.aryMethod);
198
199 var wrappers = {
200 'castArray': function(castArray) {
201 return function() {
202 var value = arguments[0];
203 return isArray(value)
204 ? castArray(cloneArray(value))
205 : castArray.apply(undefined, arguments);
206 };
207 },
208 'iteratee': function(iteratee) {
209 return function() {
210 var func = arguments[0],
211 arity = arguments[1],
212 result = iteratee(func, arity),
213 length = result.length;
214
215 if (config.cap && typeof arity == 'number') {
216 arity = arity > 2 ? (arity - 2) : 1;
217 return (length && length <= arity) ? result : baseAry(result, arity);
218 }
219 return result;
220 };
221 },
222 'mixin': function(mixin) {
223 return function(source) {
224 var func = this;
225 if (!isFunction(func)) {
226 return mixin(func, Object(source));
227 }
228 var pairs = [];
229 each(keys(source), function(key) {
230 if (isFunction(source[key])) {
231 pairs.push([key, func.prototype[key]]);
232 }
233 });
234
235 mixin(func, Object(source));
236
237 each(pairs, function(pair) {
238 var value = pair[1];
239 if (isFunction(value)) {
240 func.prototype[pair[0]] = value;
241 } else {
242 delete func.prototype[pair[0]];
243 }
244 });
245 return func;
246 };
247 },
248 'nthArg': function(nthArg) {
249 return function(n) {
250 var arity = n < 0 ? 1 : (toInteger(n) + 1);
251 return curry(nthArg(n), arity);
252 };
253 },
254 'rearg': function(rearg) {
255 return function(func, indexes) {
256 var arity = indexes ? indexes.length : 0;
257 return curry(rearg(func, indexes), arity);
258 };
259 },
260 'runInContext': function(runInContext) {
261 return function(context) {
262 return baseConvert(util, runInContext(context), options);
263 };
264 }
265 };
266
267 /*--------------------------------------------------------------------------*/
268
269 /**
270 * Casts `func` to a function with an arity capped iteratee if needed.
271 *
272 * @private
273 * @param {string} name The name of the function to inspect.
274 * @param {Function} func The function to inspect.
275 * @returns {Function} Returns the cast function.
276 */
277 function castCap(name, func) {
278 if (config.cap) {
279 var indexes = mapping.iterateeRearg[name];
280 if (indexes) {
281 return iterateeRearg(func, indexes);
282 }
283 var n = !isLib && mapping.iterateeAry[name];
284 if (n) {
285 return iterateeAry(func, n);
286 }
287 }
288 return func;
289 }
290
291 /**
292 * Casts `func` to a curried function if needed.
293 *
294 * @private
295 * @param {string} name The name of the function to inspect.
296 * @param {Function} func The function to inspect.
297 * @param {number} n The arity of `func`.
298 * @returns {Function} Returns the cast function.
299 */
300 function castCurry(name, func, n) {
301 return (forceCurry || (config.curry && n > 1))
302 ? curry(func, n)
303 : func;
304 }
305
306 /**
307 * Casts `func` to a fixed arity function if needed.
308 *
309 * @private
310 * @param {string} name The name of the function to inspect.
311 * @param {Function} func The function to inspect.
312 * @param {number} n The arity cap.
313 * @returns {Function} Returns the cast function.
314 */
315 function castFixed(name, func, n) {
316 if (config.fixed && (forceFixed || !mapping.skipFixed[name])) {
317 var data = mapping.methodSpread[name],
318 start = data && data.start;
319
320 return start === undefined ? ary(func, n) : flatSpread(func, start);
321 }
322 return func;
323 }
324
325 /**
326 * Casts `func` to an rearged function if needed.
327 *
328 * @private
329 * @param {string} name The name of the function to inspect.
330 * @param {Function} func The function to inspect.
331 * @param {number} n The arity of `func`.
332 * @returns {Function} Returns the cast function.
333 */
334 function castRearg(name, func, n) {
335 return (config.rearg && n > 1 && (forceRearg || !mapping.skipRearg[name]))
336 ? rearg(func, mapping.methodRearg[name] || mapping.aryRearg[n])
337 : func;
338 }
339
340 /**
341 * Creates a clone of `object` by `path`.
342 *
343 * @private
344 * @param {Object} object The object to clone.
345 * @param {Array|string} path The path to clone by.
346 * @returns {Object} Returns the cloned object.
347 */
348 function cloneByPath(object, path) {
349 path = toPath(path);
350
351 var index = -1,
352 length = path.length,
353 lastIndex = length - 1,
354 result = clone(Object(object)),
355 nested = result;
356
357 while (nested != null && ++index < length) {
358 var key = path[index],
359 value = nested[key];
360
361 if (value != null &&
362 !(isFunction(value) || isError(value) || isWeakMap(value))) {
363 nested[key] = clone(index == lastIndex ? value : Object(value));
364 }
365 nested = nested[key];
366 }
367 return result;
368 }
369
370 /**
371 * Converts `lodash` to an immutable auto-curried iteratee-first data-last
372 * version with conversion `options` applied.
373 *
374 * @param {Object} [options] The options object. See `baseConvert` for more details.
375 * @returns {Function} Returns the converted `lodash`.
376 */
377 function convertLib(options) {
378 return _.runInContext.convert(options)(undefined);
379 }
380
381 /**
382 * Create a converter function for `func` of `name`.
383 *
384 * @param {string} name The name of the function to convert.
385 * @param {Function} func The function to convert.
386 * @returns {Function} Returns the new converter function.
387 */
388 function createConverter(name, func) {
389 var realName = mapping.aliasToReal[name] || name,
390 methodName = mapping.remap[realName] || realName,
391 oldOptions = options;
392
393 return function(options) {
394 var newUtil = isLib ? pristine : helpers,
395 newFunc = isLib ? pristine[methodName] : func,
396 newOptions = assign(assign({}, oldOptions), options);
397
398 return baseConvert(newUtil, realName, newFunc, newOptions);
399 };
400 }
401
402 /**
403 * Creates a function that wraps `func` to invoke its iteratee, with up to `n`
404 * arguments, ignoring any additional arguments.
405 *
406 * @private
407 * @param {Function} func The function to cap iteratee arguments for.
408 * @param {number} n The arity cap.
409 * @returns {Function} Returns the new function.
410 */
411 function iterateeAry(func, n) {
412 return overArg(func, function(func) {
413 return typeof func == 'function' ? baseAry(func, n) : func;
414 });
415 }
416
417 /**
418 * Creates a function that wraps `func` to invoke its iteratee with arguments
419 * arranged according to the specified `indexes` where the argument value at
420 * the first index is provided as the first argument, the argument value at
421 * the second index is provided as the second argument, and so on.
422 *
423 * @private
424 * @param {Function} func The function to rearrange iteratee arguments for.
425 * @param {number[]} indexes The arranged argument indexes.
426 * @returns {Function} Returns the new function.
427 */
428 function iterateeRearg(func, indexes) {
429 return overArg(func, function(func) {
430 var n = indexes.length;
431 return baseArity(rearg(baseAry(func, n), indexes), n);
432 });
433 }
434
435 /**
436 * Creates a function that invokes `func` with its first argument transformed.
437 *
438 * @private
439 * @param {Function} func The function to wrap.
440 * @param {Function} transform The argument transform.
441 * @returns {Function} Returns the new function.
442 */
443 function overArg(func, transform) {
444 return function() {
445 var length = arguments.length;
446 if (!length) {
447 return func();
448 }
449 var args = Array(length);
450 while (length--) {
451 args[length] = arguments[length];
452 }
453 var index = config.rearg ? 0 : (length - 1);
454 args[index] = transform(args[index]);
455 return func.apply(undefined, args);
456 };
457 }
458
459 /**
460 * Creates a function that wraps `func` and applys the conversions
461 * rules by `name`.
462 *
463 * @private
464 * @param {string} name The name of the function to wrap.
465 * @param {Function} func The function to wrap.
466 * @returns {Function} Returns the converted function.
467 */
468 function wrap(name, func, placeholder) {
469 var result,
470 realName = mapping.aliasToReal[name] || name,
471 wrapped = func,
472 wrapper = wrappers[realName];
473
474 if (wrapper) {
475 wrapped = wrapper(func);
476 }
477 else if (config.immutable) {
478 if (mapping.mutate.array[realName]) {
479 wrapped = wrapImmutable(func, cloneArray);
480 }
481 else if (mapping.mutate.object[realName]) {
482 wrapped = wrapImmutable(func, createCloner(func));
483 }
484 else if (mapping.mutate.set[realName]) {
485 wrapped = wrapImmutable(func, cloneByPath);
486 }
487 }
488 each(aryMethodKeys, function(aryKey) {
489 each(mapping.aryMethod[aryKey], function(otherName) {
490 if (realName == otherName) {
491 var data = mapping.methodSpread[realName],
492 afterRearg = data && data.afterRearg;
493
494 result = afterRearg
495 ? castFixed(realName, castRearg(realName, wrapped, aryKey), aryKey)
496 : castRearg(realName, castFixed(realName, wrapped, aryKey), aryKey);
497
498 result = castCap(realName, result);
499 result = castCurry(realName, result, aryKey);
500 return false;
501 }
502 });
503 return !result;
504 });
505
506 result || (result = wrapped);
507 if (result == func) {
508 result = forceCurry ? curry(result, 1) : function() {
509 return func.apply(this, arguments);
510 };
511 }
512 result.convert = createConverter(realName, func);
513 result.placeholder = func.placeholder = placeholder;
514
515 return result;
516 }
517
518 /*--------------------------------------------------------------------------*/
519
520 if (!isObj) {
521 return wrap(name, func, defaultHolder);
522 }
523 var _ = func;
524
525 // Convert methods by ary cap.
526 var pairs = [];
527 each(aryMethodKeys, function(aryKey) {
528 each(mapping.aryMethod[aryKey], function(key) {
529 var func = _[mapping.remap[key] || key];
530 if (func) {
531 pairs.push([key, wrap(key, func, _)]);
532 }
533 });
534 });
535
536 // Convert remaining methods.
537 each(keys(_), function(key) {
538 var func = _[key];
539 if (typeof func == 'function') {
540 var length = pairs.length;
541 while (length--) {
542 if (pairs[length][0] == key) {
543 return;
544 }
545 }
546 func.convert = createConverter(key, func);
547 pairs.push([key, func]);
548 }
549 });
550
551 // Assign to `_` leaving `_.prototype` unchanged to allow chaining.
552 each(pairs, function(pair) {
553 _[pair[0]] = pair[1];
554 });
555
556 _.convert = convertLib;
557 _.placeholder = _;
558
559 // Assign aliases.
560 each(keys(_), function(key) {
561 each(mapping.realToAlias[key] || [], function(alias) {
562 _[alias] = _[key];
563 });
564 });
565
566 return _;
567}
568
569module.exports = baseConvert;
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