// wink-nlp-utils
// NLP Functions for amplifying negations, managing elisions,
// creating ngrams, stems, phonetic codes to tokens and more.
//
// Copyright (C) GRAYPE Systems Private Limited
//
// This file is part of “wink-nlp-utils”.
//
// Permission is hereby granted, free of charge, to any person obtaining a
// copy of this software and associated documentation files (the "Software"),
// to deal in the Software without restriction, including without limitation
// the rights to use, copy, modify, merge, publish, distribute, sublicense,
// and/or sell copies of the Software, and to permit persons to whom the
// Software is furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included
// in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
// THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
// DEALINGS IN THE SOFTWARE.
//
var helpers = require( 'wink-helpers' );
var returnQuotedTextExtractor = require( './helper-return-quoted-text-extractor.js' );
var extractQuotedText = returnQuotedTextExtractor( '[', ']' );
// ## string
// ### composeCorpus
/**
*
* Generates all possible sentences from the input argument string.
* The string s must follow a special syntax as illustrated in the
* example below:<br/>
* `'[I] [am having|have] [a] [problem|question]'`<br/>
*
* Each phrase must be quoted between `[ ]` and each possible option of phrases
* (if any) must be separated by a `|` character. The corpus is composed by
* computing the cartesian product of all the phrases.
*
* @alias string#composeCorpus
* @param {string} str the input string.
* @return {string[]} of all possible sentences.
* @example
* composeCorpus( '[I] [am having|have] [a] [problem|question]' );
* // -> [ 'I am having a problem',
* // 'I am having a question',
* // 'I have a problem',
* // 'I have a question' ]
*/
var composeCorpus = function ( str ) {
if ( !str || ( typeof str !== 'string' ) ) return [];
var quotedTextElems = extractQuotedText( str );
var corpus = [];
var finalCorpus = [];
if ( !quotedTextElems ) return [];
quotedTextElems.forEach( function ( e ) {
corpus.push( e.split( '|' ) );
} );
helpers.array.product( corpus ).forEach( function ( e ) {
finalCorpus.push( e.join( ' ' ) );
} );
return ( finalCorpus );
}; // composeCorpus()
module.exports = composeCorpus;