SimenB/stylint

'use strict'

var ignoreRe = /^{|[,}]|(:after|:active|:before|@import|@require|@extend|@media|:hover|@font-face|src)|,$/
var lastFile = ''


/**
 * @description check that selector properties are sorted alphabetically
 * @param {string} [line] curr line being linted
 * @returns {boolean} true if dupe found, false if not
 */
var duplicates = function( line ) {
    var arr = this.splitAndStrip( new RegExp( /[\s\t]/ ), line )
    var dupe = false
    var dupeIndex
    var origFile

    // if root check not global, obliterate cache on each new file
    if ( !this.config.globalDupe &&
        lastFile !== this.cache.file ) {
        this.cache.sCache = {}
        lastFile = this.cache.file
    }

    // if cache for curr context doesn't exist yet (or was obliterated), make one
    if ( typeof this.cache.sCache[ this.state.context ] === 'undefined' ) {
        this.cache.sCache[ this.state.context ] = []
    }

    // if context changes, reset arrays except root
    // basically, root can persist across files potentially
    // caches above root only persist as long as they are within their context
    if ( this.state.context !== this.state.prevContext ) {
        Object.keys( this.cache.sCache ).forEach( function( val ) {
            // string cause key
            if ( val === '0' ) { return }
            this.cache.sCache[val] = []
        }.bind( this ) )
    }

    // if not in a list
    // and not ignored syntax
    // and property exists in the array already
    // then dupe
    if ( line.indexOf( ',' ) === -1 &&
        this.cache.prevLine.indexOf( ',' ) === -1 &&
        !ignoreRe.test( line ) ) {

        // -1 if no dupe found
        dupeIndex = this.cache.sCache[this.state.context].indexOf( arr[0] )

        // if match found at right context, is dupe
        if ( dupeIndex !== -1 ) {
            dupe = true
        }

        // push selector (and file name) to cache
        this.cache.sCache[this.state.context].push( arr[0], this.cache.file )
    }

    if ( dupe === true ) {
        // location of original selector use if global dupe on
        origFile = this.cache.sCache[this.state.context][dupeIndex + 1]

        // this.msg( 'duplicate property or selector, consider merging' )
        if ( !this.config.globalDupe ) {
            this.msg(
                'duplicate property or selector, consider merging'
            )
        }
        else {
            this.msg(
                'duplicate property or selector, consider merging\nsee file: ' + origFile + ' for the original selector'
            )
        }
    }

    return dupe
}

module.exports = duplicates