Actions as store functions about mockstate HOT 4 CLOSED

// displays the differences between new and old state
function debugDiffs() {
         var oldState = ...
         var newState = ...
         var diff = require("deep-diff");      
         var diffs = diff(oldState, newState);
         if(diffs) 
         {
            _.each(diffs, function (d) {
               console.log(prettyDiff(d));
            });
         }
}

export function prettyDiff(d: deepDiff.IDiff) 
{
   try 
   {
      var path = "";
      if(d.path) path = d.path.join(".");
      if(d.index!==undefined) path = path + `[${d.index}]`;

      var value = d.item ? d.item.rhs : d.rhs; 

      var msg = "";

      switch(d.kind) {
         case "N":
            msg = `${path} = ${JSON.stringify(d.rhs)};`;
            break;

         case "E":
            msg = `${path} = ${JSON.stringify(d.rhs)}; // was: ${JSON.stringify(d.lhs)}`;
            break;

         case "D":
            msg = `delete ${path}; // was: ${JSON.stringify(d.lhs)}`;
            break;

         case "A":
            switch(d.item.kind) {
               case "N":
                  msg = `${path} = ${JSON.stringify(d.item.rhs)};`;
                  break;

               case "E":
                  msg = `${path} = ${JSON.stringify(d.item.rhs)}; // was: ${JSON.stringify(d.item.lhs)}`;
                  break;

               case "D":
                  msg = `delete ${path}; // was ${JSON.stringify(d.item.lhs)}`;
                  break;

               default:
                  msg = `array change in ${path}: ${JSON.stringify(d)}`;
            }         
            break;

         default:
            msg = `unknown diff: ${JSON.stringify(d)}`;
      }

      return msg;
   }
   catch(ex)
   {
      return ex.message;
   }
}