/**
* map reduce统一处理函数
*
* @param string $out
* @param resource $dataModel
* @param array $statisticInfo
* @param array $query
* @param string $method
* @param string $scope
* @param array $sort
* @param int $limit
*/
function mapReduce($out = null, MongoCollection $dataModel, $statisticInfo, $query, $method = 'replace', $scope = null, $sort = array('$natural' => 1), $limit = null)
{
$map = "function(){\r\n var xAxisType = '{$statisticInfo['xAxisType']}';\r\n var xAxisField = this.{$statisticInfo['xAxisField']}; \r\n var yAxisField = this.{$statisticInfo['yAxisField']}; \r\n var xAxisTitle = '{$statisticInfo['xAxisTitle']}'; \r\n var key = '';\r\n var rst = {\r\n total : isNumber(yAxisField) ? yAxisField : 0,\r\n count : yAxisField!==null ? 1 : 0,\r\n max : isNumber(yAxisField) ? yAxisField : Number.NEGATIVE_INFINITY,\r\n min : isNumber(yAxisField) ? yAxisField : Number.POSITIVE_INFINITY,\r\n val : [yAxisField]\r\n };\r\n\r\n if(xAxisField==null ||yAxisField==null) {\r\n key = '__OTHERS__';\r\n return emit(key,rst);\r\n }\r\n if(xAxisType=='hour' || xAxisType=='day' || xAxisType=='month' || xAxisType=='year') {\r\n if(xAxisField!==null) {\r\n try {\r\n var time = new Date(xAxisField);\r\n var timeSec = time.getTime();\r\n var year = time.getFullYear();\r\n var m = time.getMonth() + 1;\r\n var month = m<10 ? '0'+m : m; \r\n var d = time.getDate();\r\n var day = d<10 ? '0'+d : d; \r\n var h = time.getHours();\r\n var hour = h<10 ? '0'+h : h; \r\n } catch (e) {\r\n key = '__OTHERS__';\r\n return emit(key,rst);\r\n }\r\n }\r\n else {\r\n key = '__OTHERS__';\r\n return emit(key,rst);\r\n }\r\n }\r\n else {\r\n if(!isNumber(yAxisField)) {\r\n yAxisField = 0;\r\n }\r\n }\r\n \r\n if(xAxisField instanceof Array || xAxisField instanceof Object) {\r\n if(xAxisField instanceof NumberLong) {\r\n xAxisField = NumberInt(xAxisField);\r\n } else {\r\n xAxisField = xAxisField.toString();\r\n }\r\n }\r\n \r\n switch(xAxisType) {\r\n case 'total':\r\n key = xAxisTitle;\r\n break;\r\n case 'range':\r\n var\toptions = [\r\n 0,\r\n\t\t\t\t\t\t10, 20, 50,\r\n\t\t\t\t\t\t100, 200, 500,\r\n\t\t\t\t\t\t1000, 2000, 5000,\r\n\t\t\t\t\t\t10000, 20000, 50000,\r\n\t\t\t\t\t\t100000, 200000, 500000,\r\n\t\t\t\t\t\t1000000, 2000000, 5000000,\r\n\t\t\t\t\t\t10000000, 20000000, 50000000,\r\n\t\t\t\t\t\t100000000, 200000000, 500000000,\r\n\t\t\t\t\t\t1000000000, Number.POSITIVE_INFINITY\r\n\t\t\t\t\t];\r\n \t\t\t\t\r\n\t\t\t\t\tfor(var index = 0; options[index] < field; index++) {\r\n\t\t\t\t\t\tkey = options[index]+'-'+options[index+1];\r\n\t\t\t\t\t}\r\n break;\r\n case 'day':\r\n key = year+'/'+month+'/'+day;\r\n break;\r\n case 'month':\r\n key = year+'/'+month;\r\n break;\r\n case 'year':\r\n key = year;\r\n break;\r\n case 'hour':\r\n key = hour;\r\n break;\r\n default : \r\n key = xAxisField;\r\n break;\r\n }\r\n \r\n return emit(key,rst);\r\n }";
$reduce = "function(key,values){\r\n var rst = {\r\n total : 0,\r\n count : 0,\r\n max : Number.NEGATIVE_INFINITY,\r\n min : Number.POSITIVE_INFINITY,\r\n val : []\r\n };\r\n\r\n var yAxisType = '{$statisticInfo['yAxisType']}';\r\n var length = values.length;\r\n for(var idx = 0; idx < length ; idx++) { \r\n if(yAxisType=='count') {\r\n rst.count += values[idx].count;\r\n } else if(yAxisType=='sum') {\r\n rst.total += values[idx].total;\r\n } else if(yAxisType=='max') {\r\n if(rst.max==null)\r\n rst.max = values[idx].max;\r\n else if(rst.max <= values[idx].max) {\r\n rst.max = values[idx].max;\r\n }\r\n } else if(yAxisType=='min') {\r\n if(rst.min==null) {\r\n rst.min = values[idx].min;\r\n }\r\n else if(rst.min >= values[idx].min) {\r\n rst.min = values[idx].min;\r\n }\r\n } else if(yAxisType=='unique'||yAxisType=='distinct') {\r\n if(values[idx].val instanceof Array) {\r\n values[idx].val.forEach(function(v,i){\r\n rst.val.push(v);\r\n }); \r\n }\r\n } else if(yAxisType=='avg') {\r\n rst.total += values[idx].total;\r\n rst.count += values[idx].count;\r\n } else if(yAxisType=='median') {\r\n values[idx].val.forEach(function(v,i){\r\n if(typeof(v)=='number') {\r\n rst.val.push(v);\r\n }\r\n });\r\n } else if(yAxisType=='variance') {\r\n rst.total += values[idx].total;\r\n rst.count += values[idx].count;\r\n values[idx].val.forEach(function(v,i){\r\n rst.val.push(v);\r\n });\r\n } else if(yAxisType=='standard') {\r\n rst.total += values[idx].total;\r\n rst.count += values[idx].count;\r\n values[idx].val.forEach(function(v,i){\r\n rst.val.push(v);\r\n });\r\n }\r\n }\r\n return rst;\r\n }";
$finalize = "function(key,reducedValue){\r\n var rst = 0;\r\n var uniqueData = [];\r\n var uniqueNumber = 0;\r\n var yAxisType = '{$statisticInfo['yAxisType']}'; \r\n if(yAxisType=='count') {\r\n rst = reducedValue.count;\r\n }\r\n else if(yAxisType=='sum') {\r\n rst = reducedValue.total;\r\n }\r\n else if(yAxisType=='max') {\r\n rst = reducedValue.max;\r\n }\r\n else if(yAxisType=='min') {\r\n rst = reducedValue.min;\r\n }\r\n else if(yAxisType=='unique' || yAxisType=='distinct') {\r\n reducedValue.val.forEach(function(v,i){\r\n if(uniqueData.indexOf(v)===-1) {\r\n uniqueNumber += 1;\r\n uniqueData.push(v);\r\n }\r\n });\r\n rst = uniqueNumber;\r\n }\r\n else if(yAxisType=='avg') {\r\n rst = reducedValue.total / reducedValue.count;\r\n rst = Math.round(rst*10000)/10000;\r\n }\r\n else if(yAxisType=='median') {\r\n reducedValue.val.sort(function(a,b){return a>b?1:-1});\r\n var length = reducedValue.val.length;\r\n rst = reducedValue.val[parseInt(Math.floor(length/2))];\r\n }\r\n else if(yAxisType=='variance') {\r\n var avg = reducedValue.total / reducedValue.count;\r\n var squared_Diff = 0;\r\n var length = reducedValue.val.length;\r\n for(var i=0;i<length;i++) {\r\n var deviation = reducedValue.val[i] - avg;\r\n squared_Diff += deviation * deviation;\r\n }\r\n rst = squared_Diff/length;\r\n rst = Math.round(rst*10000)/10000;\r\n }\r\n else if(yAxisType=='standard') {\r\n var avg = reducedValue.total / reducedValue.count;\r\n var squared_Diff = 0;\r\n var length = reducedValue.val.length;\r\n for(var i=0;i<length;i++) {\r\n var deviation = reducedValue.val[i] - avg;\r\n squared_Diff += deviation * deviation;\r\n }\r\n rst = Math.sqrt(squared_Diff/length);\r\n rst = Math.round(rst*10000)/10000;\r\n }\r\n return rst;\r\n }";
return $dataModel->mapReduce($out, $map, $reduce, $query, $finalize, $method, $scope, $sort, $limit);
}
