Date: Add formatDateToParts (1/2)

Ref globalizejs#678
Ref globalizejs#697
Ref globalizejs#700

src/date-runtime.js

@@ -5,17 +5,15 @@ define([
 	"./common/validate/parameter-type/string",
 	"./core-runtime",
 	"./date/format",
-	"./date/formatter-fn",
 	"./date/parse",
 	"./date/parser-fn",
 	"./date/tokenizer",
 
 	"./number-runtime"
 ], function( runtimeKey, validateParameterPresence, validateParameterTypeDate,
-	validateParameterTypeString, Globalize, dateFormat, dateFormatterFn, dateParse, dateParserFn,
+	validateParameterTypeString, Globalize, dateFormat, dateParse, dateParserFn,
 	dateTokenizer ) {
 
-Globalize._dateFormatterFn = dateFormatterFn;
 Globalize._dateParserFn = dateParserFn;
 Globalize._dateFormat = dateFormat;
 Globalize._dateParser = dateParse;
@@ -24,8 +22,19 @@ Globalize._validateParameterTypeDate = validateParameterTypeDate;
 
 Globalize.dateFormatter =
 Globalize.prototype.dateFormatter = function( options ) {
+	var formatterFn = this.dateToPartsFormatter( options );
+	return function() {
+		var parts = formatterFn.apply( this, arguments );
+		return parts.map( function( part ) {
+			return part.value;
+		}).join( "" );
+	};
+};
+
+Globalize.dateToPartsFormatter =
+Globalize.prototype.dateToPartsFormatter = function( options ) {
 	options = options || { skeleton: "yMd" };
-	return Globalize[ runtimeKey( "dateFormatter", this._locale, [ options ] ) ];
+	return Globalize[ runtimeKey( "dateToPartsFormatter", this._locale, [ options ] ) ];
 };
 
 Globalize.dateParser =
@@ -42,6 +51,14 @@ Globalize.prototype.formatDate = function( value, options ) {
 	return this.dateFormatter( options )( value );
 };
 
+Globalize.formatDateToParts =
+Globalize.prototype.formatDateToParts = function( value, options ) {
+	validateParameterPresence( value, "value" );
+	validateParameterTypeDate( value, "value" );
+
+	return this.dateToPartsFormatter( options )( value );
+};
+
 Globalize.parseDate =
 Globalize.prototype.parseDate = function( value, options ) {
 	validateParameterPresence( value, "value" );

src/date.js

@@ -10,7 +10,7 @@ define([
 	"./common/validate/parameter-type/string",
 	"./core",
 	"./date/expand-pattern",
-	"./date/formatter-fn",
+	"./date/to-parts-formatter-fn",
 	"./date/format-properties",
 	"./date/parser-fn",
 	"./date/parse-properties",
@@ -21,7 +21,7 @@ define([
 	"./number"
 ], function( Cldr, runtimeBind, validate, validateCldr, validateDefaultLocale,
 	validateParameterPresence, validateParameterTypeDate, validateParameterTypePlainObject,
-	validateParameterTypeString, Globalize, dateExpandPattern, dateFormatterFn,
+	validateParameterTypeString, Globalize, dateExpandPattern, dateToPartsFormatterFn,
 	dateFormatProperties, dateParserFn, dateParseProperties, dateTokenizerProperties ) {
 
 function validateRequiredCldr( path, value ) {
@@ -77,6 +77,33 @@ function validateOptionsSkeleton( pattern, skeleton ) {
  */
 Globalize.dateFormatter =
 Globalize.prototype.dateFormatter = function( options ) {
+	var formatterFn = this.dateToPartsFormatter( options );
+	return function() {
+		var parts = formatterFn.apply( this, arguments );
+		return parts.map( function( part ) {
+			return part.value;
+		}).join( "" );
+	};
+};
+
+/**
+ * .dateToPartsFormatter( options )
+ *
+ * @options [Object] see date/expand_pattern for more info.
+ *
+ * Return a date formatter function (of the form below) according to the given options and the
+ * default/instance locale.
+ *
+ * fn( value )
+ *
+ * @value [Date]
+ *
+ * Return a function that formats a date to parts according to the given `format`
+ * and the default/instance
+ * locale.
+ */
+Globalize.dateToPartsFormatter =
+Globalize.prototype.dateToPartsFormatter = function( options ) {
 	var args, cldr, numberFormatters, pad, pattern, properties, returnFn;
 
 	validateParameterTypePlainObject( options, "options" );
@@ -104,7 +131,7 @@ Globalize.prototype.dateFormatter = function( options ) {
 		});
 	}
 
-	returnFn = dateFormatterFn( numberFormatters, properties );
+	returnFn = dateToPartsFormatterFn( numberFormatters, properties );
 
 	runtimeBind( args, cldr, returnFn, [ numberFormatters, properties ] );
 
@@ -166,6 +193,23 @@ Globalize.prototype.formatDate = function( value, options ) {
 	return this.dateFormatter( options )( value );
 };
 
+/**
+ * .formatDateToParts( value, options )
+ *
+ * @value [Date]
+ *
+ * @options [Object] see date/expand_pattern for more info.
+ *
+ * Formats a date or number to parts according to the given options and the default/instance locale.
+ */
+Globalize.formatDateToParts =
+Globalize.prototype.formatDateToParts = function( value, options ) {
+	validateParameterPresence( value, "value" );
+	validateParameterTypeDate( value, "value" );
+
+	return this.dateToPartsFormatter( options )( value );
+};
+
 /**
  * .parseDate( value, options )
  *

src/date/fields-map.js

@@ -0,0 +1,14 @@
+define([
+	"./inverse-fields-map"
+], function( dateInverseFieldsMap ) {
+
+// Invert key and values, e.g., {"year": "yY"} ==> {"y": "year", "Y": "year"}
+return Object.keys( dateInverseFieldsMap ).reduce( function( map, key ) {
+	var value = dateInverseFieldsMap[ key ];
+	value.split( "" ).forEach(function( symbol ) {
+		map[ symbol ] = key;
+	});
+	return map;
+}, {});
+
+});