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   1 /**
   2  * @fileoverview Rule to require sorting of variables within a single Variable Declaration block
   3  * @author Ilya Volodin
   4  */
   5
   6 "use strict";
   7
   8 //------------------------------------------------------------------------------
   9 // Rule Definition
  10 //------------------------------------------------------------------------------
  11
  12 module.exports = function(context) {
  13
  14     var configuration = context.options[0] || {},
  15         ignoreCase = configuration.ignoreCase || false;
  16
  17     return {
  18         "VariableDeclaration": function(node) {
  19             node.declarations.reduce(function(memo, decl) {
  20                 var lastVariableName = memo.id.name,
  21                     currenVariableName = decl.id.name;
  22
  23                 if (ignoreCase) {
  24                     lastVariableName = lastVariableName.toLowerCase();
  25                     currenVariableName = currenVariableName.toLowerCase();
  26                 }
  27
  28                 if (currenVariableName < lastVariableName) {
  29                     context.report(decl, "Variables within the same declaration block should be sorted alphabetically");
  30                     return memo;
  31                 } else {
  32                     return decl;
  33                 }
  34             }, node.declarations[0]);
  35         }
  36     };
  37 };