95 lines
2.4 KiB
JavaScript
95 lines
2.4 KiB
JavaScript
var types = require(__dirname + '/types/');
|
|
|
|
//result object returned from query
|
|
//in the 'end' event and also
|
|
//passed as second argument to provided callback
|
|
var Result = function(rowMode) {
|
|
this.command = null;
|
|
this.rowCount = null;
|
|
this.oid = null;
|
|
this.rows = [];
|
|
this.fields = [];
|
|
this._parsers = [];
|
|
if(rowMode == "array") {
|
|
this.parseRow = this._parseRowAsArray;
|
|
}
|
|
};
|
|
|
|
var matchRegexp = /([A-Za-z]+) ?(\d+ )?(\d+)?/;
|
|
|
|
//adds a command complete message
|
|
Result.prototype.addCommandComplete = function(msg) {
|
|
var match;
|
|
if(msg.text) {
|
|
//pure javascript
|
|
match = matchRegexp.exec(msg.text);
|
|
} else {
|
|
//native bindings
|
|
match = matchRegexp.exec(msg.command);
|
|
}
|
|
if(match) {
|
|
this.command = match[1];
|
|
//match 3 will only be existing on insert commands
|
|
if(match[3]) {
|
|
//msg.value is from native bindings
|
|
this.rowCount = parseInt(match[3] || msg.value, 10);
|
|
this.oid = parseInt(match[2], 10);
|
|
} else {
|
|
this.rowCount = parseInt(match[2], 10);
|
|
}
|
|
}
|
|
};
|
|
|
|
Result.prototype._parseRowAsArray = function(rowData) {
|
|
var row = [];
|
|
for(var i = 0, len = rowData.length; i < len; i++) {
|
|
var rawValue = rowData[i];
|
|
if(rawValue !== null) {
|
|
row.push(this._parsers[i](rawValue));
|
|
} else {
|
|
row.push(null);
|
|
}
|
|
}
|
|
return row;
|
|
};
|
|
|
|
//rowData is an array of text or binary values
|
|
//this turns the row into a JavaScript object
|
|
Result.prototype.parseRow = function(rowData) {
|
|
var row = {};
|
|
for(var i = 0, len = rowData.length; i < len; i++) {
|
|
var rawValue = rowData[i];
|
|
var field = this.fields[i];
|
|
var fieldType = field.dataTypeID;
|
|
var parsedValue = null;
|
|
if(rawValue !== null) {
|
|
parsedValue = this._parsers[i](rawValue);
|
|
}
|
|
var fieldName = field.name;
|
|
row[fieldName] = parsedValue;
|
|
}
|
|
return row;
|
|
};
|
|
|
|
Result.prototype.addRow = function(row) {
|
|
this.rows.push(row);
|
|
};
|
|
|
|
Result.prototype.addFields = function(fieldDescriptions) {
|
|
//clears field definitions
|
|
//multiple query statements in 1 action can result in multiple sets
|
|
//of rowDescriptions...eg: 'select NOW(); select 1::int;'
|
|
//you need to reset the fields
|
|
if(this.fields.length) {
|
|
this.fields = [];
|
|
this._parsers = [];
|
|
}
|
|
for(var i = 0; i < fieldDescriptions.length; i++) {
|
|
var desc = fieldDescriptions[i];
|
|
this.fields.push(desc);
|
|
this._parsers.push(types.getTypeParser(desc.dataTypeID, desc.format || 'text'));
|
|
}
|
|
};
|
|
|
|
module.exports = Result;
|