angular-cached-resource/lib/read_array_cache.js

An AngularJS module to interact with RESTful resources, even when browser is offline

// Generated by CoffeeScript 1.10.0
var modifyObjectInPlace, processReadArgs, readArrayCache,
  slice = [].slice;

processReadArgs = require('./process_read_args');

modifyObjectInPlace = require('./modify_object_in_place');

module.exports = readArrayCache = function($q, providerParams, name, CachedResource, actionConfig) {
  var ResourceCacheArrayEntry, ResourceCacheEntry, first;
  ResourceCacheEntry = require('./resource_cache_entry')(providerParams);
  ResourceCacheArrayEntry = require('./resource_cache_array_entry')(providerParams);
  first = function(array, params) {
    var found, i, item, itemParams, len;
    found = null;
    for (i = 0, len = array.length; i < len; i++) {
      item = array[i];
      itemParams = item.$params();
      if (Object.keys(params).every(function(key) {
        return itemParams[key] === params[key];
      })) {
        found = item;
        break;
      }
    }
    return found;
  };
  return function() {
    var arrayInstance, cacheArrayEntry, cacheDeferred, cacheInstanceEntry, cacheInstanceParams, httpDeferred, i, len, params, readHttp, ref, ref1;
    ref = processReadArgs($q, arguments), params = ref.params, cacheDeferred = ref.deferred;
    httpDeferred = $q.defer();
    arrayInstance = new Array();
    arrayInstance.$promise = cacheDeferred.promise;
    arrayInstance.$httpPromise = httpDeferred.promise;
    cacheArrayEntry = new ResourceCacheArrayEntry(CachedResource.$key, params).load();
    arrayInstance.$push = function(resourceInstance) {
      arrayInstance.push(resourceInstance);
      return cacheArrayEntry.addInstances([resourceInstance], false, {
        append: true
      });
    };
    arrayInstance.$httpPromise.then(function(instances) {
      return cacheArrayEntry.addInstances(instances, false);
    });
    readHttp = function() {
      var resource;
      resource = CachedResource.$resource[name](params);
      resource.$promise.then(function(response) {
        var newArrayInstance;
        newArrayInstance = new Array();
        response.map(function(resourceInstance) {
          var existingInstance;
          resourceInstance = new CachedResource(resourceInstance);
          existingInstance = first(arrayInstance, resourceInstance.$params());
          if (existingInstance) {
            modifyObjectInPlace(existingInstance, resourceInstance);
            return newArrayInstance.push(existingInstance);
          } else {
            return newArrayInstance.push(resourceInstance);
          }
        });
        arrayInstance.splice.apply(arrayInstance, [0, arrayInstance.length].concat(slice.call(newArrayInstance)));
        if (!cacheArrayEntry.value) {
          cacheDeferred.resolve(arrayInstance);
        }
        return httpDeferred.resolve(arrayInstance);
      });
      return resource.$promise["catch"](function(error) {
        if (!cacheArrayEntry.value) {
          cacheDeferred.reject(error);
        }
        return httpDeferred.reject(error);
      });
    };
    if (!actionConfig.cacheOnly) {
      CachedResource.$writes.flush(readHttp);
    }
    if (cacheArrayEntry.value) {
      ref1 = cacheArrayEntry.value;
      for (i = 0, len = ref1.length; i < len; i++) {
        cacheInstanceParams = ref1[i];
        cacheInstanceEntry = new ResourceCacheEntry(CachedResource.$key, cacheInstanceParams).load();
        arrayInstance.push(new CachedResource(cacheInstanceEntry.value));
      }
      cacheDeferred.resolve(arrayInstance);
    } else if (actionConfig.cacheOnly) {
      cacheDeferred.reject(new Error("Cache value does not exist for params", params));
    }
    return arrayInstance;
  };
};