rm errorCallback, add normalizeMethod; cleanup

.gitignore

@@ -18,4 +18,5 @@ npm-debug.log
 test/support/big.db
 test/tmp
 test/nw/app.nw
-.DS_Store
+.DS_Store
+.idea

lib/sqlite3.js

@@ -1,16 +1,24 @@
-var path = require('path');
 var binary = require('node-pre-gyp');
-var path = require('path')
+var path = require('path');
 var binding_path = binary.find(path.resolve(path.join(__dirname,'../package.json')));
 var binding = require(binding_path);
 var sqlite3 = module.exports = exports = binding;
-var util = require('util');
 var EventEmitter = require('events').EventEmitter;
 
-function errorCallback(args) {
-    if (typeof args[args.length - 1] === 'function') {
-        var callback = args[args.length - 1];
-        return function(err) { if (err) callback(err); };
+function normalizeMethod (fn) {
+    return function (sql) {
+        var errBack;
+        var args = Array.prototype.slice.call(arguments, 1);
+        if (typeof args[args.length - 1] === 'function') {
+            var callback = args[args.length - 1];
+            errBack = function(err) {
+                if (err) {
+                    callback(err);
+                }
+            };
+        }
+        var statement = new Statement(this, sql, errBack);
+        return fn.call(this, statement, args);
     }
 }
 
@@ -55,56 +63,40 @@ inherits(Database, EventEmitter);
 inherits(Statement, EventEmitter);
 
 // Database#prepare(sql, [bind1, bind2, ...], [callback])
-Database.prototype.prepare = function(sql) {
-    var params = Array.prototype.slice.call(arguments, 1);
-
-    if (!params.length || (params.length === 1 && typeof params[0] === 'function')) {
-        return new Statement(this, sql, params[0]);
-    }
-    else {
-        var statement = new Statement(this, sql, errorCallback(params));
-        return statement.bind.apply(statement, params);
-    }
-};
+Database.prototype.prepare = normalizeMethod(function(statement, params) {
+    return params.length
+        ? statement.bind.apply(statement, params)
+        : statement;
+});
 
 // Database#run(sql, [bind1, bind2, ...], [callback])
-Database.prototype.run = function(sql) {
-    var params = Array.prototype.slice.call(arguments, 1);
-    var statement = new Statement(this, sql, errorCallback(params));
+Database.prototype.run = normalizeMethod(function(statement, params) {
     statement.run.apply(statement, params).finalize();
     return this;
-};
+});
 
 // Database#get(sql, [bind1, bind2, ...], [callback])
-Database.prototype.get = function(sql) {
-    var params = Array.prototype.slice.call(arguments, 1);
-    var statement = new Statement(this, sql, errorCallback(params));
+Database.prototype.get = normalizeMethod(function(statement, params) {
     statement.get.apply(statement, params).finalize();
     return this;
-};
+});
 
 // Database#all(sql, [bind1, bind2, ...], [callback])
-Database.prototype.all = function(sql) {
-    var params = Array.prototype.slice.call(arguments, 1);
-    var statement = new Statement(this, sql, errorCallback(params));
+Database.prototype.all = normalizeMethod(function(statement, params) {
     statement.all.apply(statement, params).finalize();
     return this;
-};
+});
 
 // Database#each(sql, [bind1, bind2, ...], [callback], [complete])
-Database.prototype.each = function(sql) {
-    var params = Array.prototype.slice.call(arguments, 1);
-    var statement = new Statement(this, sql, errorCallback(params));
+Database.prototype.each = normalizeMethod(function(statement, params) {
     statement.each.apply(statement, params).finalize();
     return this;
-};
+});
 
-Database.prototype.map = function(sql) {
-    var params = Array.prototype.slice.call(arguments, 1);
-    var statement = new Statement(this, sql, errorCallback(params));
+Database.prototype.map = normalizeMethod(function(statement, params) {
     statement.map.apply(statement, params).finalize();
     return this;
-};
+});
 
 Statement.prototype.map = function() {
     var params = Array.prototype.slice.call(arguments);
@@ -164,22 +156,30 @@ Database.prototype.removeAllListeners = function(type) {
 sqlite3.verbose = function() {
     if (!isVerbose) {
         var trace = require('./trace');
-        trace.extendTrace(Database.prototype, 'prepare');
-        trace.extendTrace(Database.prototype, 'get');
-        trace.extendTrace(Database.prototype, 'run');
-        trace.extendTrace(Database.prototype, 'all');
-        trace.extendTrace(Database.prototype, 'each');
-        trace.extendTrace(Database.prototype, 'map');
-        trace.extendTrace(Database.prototype, 'exec');
-        trace.extendTrace(Database.prototype, 'close');
-        trace.extendTrace(Statement.prototype, 'bind');
-        trace.extendTrace(Statement.prototype, 'get');
-        trace.extendTrace(Statement.prototype, 'run');
-        trace.extendTrace(Statement.prototype, 'all');
-        trace.extendTrace(Statement.prototype, 'each');
-        trace.extendTrace(Statement.prototype, 'map');
-        trace.extendTrace(Statement.prototype, 'reset');
-        trace.extendTrace(Statement.prototype, 'finalize');
+        [
+            'prepare',
+            'get',
+            'run',
+            'all',
+            'each',
+            'map',
+            'close',
+            'exec'
+        ].forEach(function (name) {
+            trace.extendTrace(Database.prototype, name);
+        });
+        [
+            'bind',
+            'get',
+            'run',
+            'all',
+            'each',
+            'map',
+            'reset',
+            'finalize',
+        ].forEach(function (name) {
+            trace.extendTrace(Statement.prototype, name);
+        });
         isVerbose = true;
     }