414 lines
13 KiB
JavaScript
414 lines
13 KiB
JavaScript
/*!
|
|
* accounting.js v0.4.2
|
|
* Copyright 2014 Open Exchange Rates
|
|
*
|
|
* Freely distributable under the MIT license.
|
|
* Portions of accounting.js are inspired or borrowed from underscore.js
|
|
*
|
|
* Full details and documentation:
|
|
* http://openexchangerates.github.io/accounting.js/
|
|
*/
|
|
|
|
(function(root, undefined) {
|
|
|
|
/* --- Setup --- */
|
|
|
|
// Create the local library object, to be exported or referenced globally later
|
|
var lib = {};
|
|
|
|
// Current version
|
|
lib.version = '0.4.1';
|
|
|
|
|
|
/* --- Exposed settings --- */
|
|
|
|
// The library's settings configuration object. Contains default parameters for
|
|
// currency and number formatting
|
|
lib.settings = {
|
|
currency: {
|
|
symbol : "$", // default currency symbol is '$'
|
|
format : "%s%v", // controls output: %s = symbol, %v = value (can be object, see docs)
|
|
decimal : ".", // decimal point separator
|
|
thousand : ",", // thousands separator
|
|
precision : 2, // decimal places
|
|
grouping : 3 // digit grouping (not implemented yet)
|
|
},
|
|
number: {
|
|
precision : 0, // default precision on numbers is 0
|
|
grouping : 3, // digit grouping (not implemented yet)
|
|
thousand : ",",
|
|
decimal : "."
|
|
}
|
|
};
|
|
|
|
|
|
/* --- Internal Helper Methods --- */
|
|
|
|
// Store reference to possibly-available ECMAScript 5 methods for later
|
|
var nativeMap = Array.prototype.map,
|
|
nativeIsArray = Array.isArray,
|
|
toString = Object.prototype.toString;
|
|
|
|
/**
|
|
* Tests whether supplied parameter is a string
|
|
* from underscore.js
|
|
*/
|
|
function isString(obj) {
|
|
return !!(obj === '' || (obj && obj.charCodeAt && obj.substr));
|
|
}
|
|
|
|
/**
|
|
* Tests whether supplied parameter is a string
|
|
* from underscore.js, delegates to ECMA5's native Array.isArray
|
|
*/
|
|
function isArray(obj) {
|
|
return nativeIsArray ? nativeIsArray(obj) : toString.call(obj) === '[object Array]';
|
|
}
|
|
|
|
/**
|
|
* Tests whether supplied parameter is a true object
|
|
*/
|
|
function isObject(obj) {
|
|
return obj && toString.call(obj) === '[object Object]';
|
|
}
|
|
|
|
/**
|
|
* Extends an object with a defaults object, similar to underscore's _.defaults
|
|
*
|
|
* Used for abstracting parameter handling from API methods
|
|
*/
|
|
function defaults(object, defs) {
|
|
var key;
|
|
object = object || {};
|
|
defs = defs || {};
|
|
// Iterate over object non-prototype properties:
|
|
for (key in defs) {
|
|
if (defs.hasOwnProperty(key)) {
|
|
// Replace values with defaults only if undefined (allow empty/zero values):
|
|
if (object[key] == null) object[key] = defs[key];
|
|
}
|
|
}
|
|
return object;
|
|
}
|
|
|
|
/**
|
|
* Implementation of `Array.map()` for iteration loops
|
|
*
|
|
* Returns a new Array as a result of calling `iterator` on each array value.
|
|
* Defers to native Array.map if available
|
|
*/
|
|
function map(obj, iterator, context) {
|
|
var results = [], i, j;
|
|
|
|
if (!obj) return results;
|
|
|
|
// Use native .map method if it exists:
|
|
if (nativeMap && obj.map === nativeMap) return obj.map(iterator, context);
|
|
|
|
// Fallback for native .map:
|
|
for (i = 0, j = obj.length; i < j; i++ ) {
|
|
results[i] = iterator.call(context, obj[i], i, obj);
|
|
}
|
|
return results;
|
|
}
|
|
|
|
/**
|
|
* Check and normalise the value of precision (must be positive integer)
|
|
*/
|
|
function checkPrecision(val, base) {
|
|
val = Math.round(Math.abs(val));
|
|
return isNaN(val)? base : val;
|
|
}
|
|
|
|
|
|
/**
|
|
* Parses a format string or object and returns format obj for use in rendering
|
|
*
|
|
* `format` is either a string with the default (positive) format, or object
|
|
* containing `pos` (required), `neg` and `zero` values (or a function returning
|
|
* either a string or object)
|
|
*
|
|
* Either string or format.pos must contain "%v" (value) to be valid
|
|
*/
|
|
function checkCurrencyFormat(format) {
|
|
var defaults = lib.settings.currency.format;
|
|
|
|
// Allow function as format parameter (should return string or object):
|
|
if ( typeof format === "function" ) format = format();
|
|
|
|
// Format can be a string, in which case `value` ("%v") must be present:
|
|
if ( isString( format ) && format.match("%v") ) {
|
|
|
|
// Create and return positive, negative and zero formats:
|
|
return {
|
|
pos : format,
|
|
neg : format.replace("-", "").replace("%v", "-%v"),
|
|
zero : format
|
|
};
|
|
|
|
// If no format, or object is missing valid positive value, use defaults:
|
|
} else if ( !format || !format.pos || !format.pos.match("%v") ) {
|
|
|
|
// If defaults is a string, casts it to an object for faster checking next time:
|
|
return ( !isString( defaults ) ) ? defaults : lib.settings.currency.format = {
|
|
pos : defaults,
|
|
neg : defaults.replace("%v", "-%v"),
|
|
zero : defaults
|
|
};
|
|
|
|
}
|
|
// Otherwise, assume format was fine:
|
|
return format;
|
|
}
|
|
|
|
|
|
/* --- API Methods --- */
|
|
|
|
/**
|
|
* Takes a string/array of strings, removes all formatting/cruft and returns the raw float value
|
|
* Alias: `accounting.parse(string)`
|
|
*
|
|
* Decimal must be included in the regular expression to match floats (defaults to
|
|
* accounting.settings.number.decimal), so if the number uses a non-standard decimal
|
|
* separator, provide it as the second argument.
|
|
*
|
|
* Also matches bracketed negatives (eg. "$ (1.99)" => -1.99)
|
|
*
|
|
* Doesn't throw any errors (`NaN`s become 0) but this may change in future
|
|
*/
|
|
var unformat = lib.unformat = lib.parse = function(value, decimal) {
|
|
// Recursively unformat arrays:
|
|
if (isArray(value)) {
|
|
return map(value, function(val) {
|
|
return unformat(val, decimal);
|
|
});
|
|
}
|
|
|
|
// Fails silently (need decent errors):
|
|
value = value || 0;
|
|
|
|
// Return the value as-is if it's already a number:
|
|
if (typeof value === "number") return value;
|
|
|
|
// Default decimal point comes from settings, but could be set to eg. "," in opts:
|
|
decimal = decimal || lib.settings.number.decimal;
|
|
|
|
// Build regex to strip out everything except digits, decimal point and minus sign:
|
|
var regex = new RegExp("[^0-9-" + decimal + "]", ["g"]),
|
|
unformatted = parseFloat(
|
|
("" + value)
|
|
.replace(/\((.*)\)/, "-$1") // replace bracketed values with negatives
|
|
.replace(regex, '') // strip out any cruft
|
|
.replace(decimal, '.') // make sure decimal point is standard
|
|
);
|
|
|
|
// This will fail silently which may cause trouble, let's wait and see:
|
|
return !isNaN(unformatted) ? unformatted : 0;
|
|
};
|
|
|
|
|
|
/**
|
|
* Implementation of toFixed() that treats floats more like decimals
|
|
*
|
|
* Fixes binary rounding issues (eg. (0.615).toFixed(2) === "0.61") that present
|
|
* problems for accounting- and finance-related software.
|
|
*/
|
|
var toFixed = lib.toFixed = function(value, precision) {
|
|
precision = checkPrecision(precision, lib.settings.number.precision);
|
|
var power = Math.pow(10, precision);
|
|
|
|
// Multiply up by precision, round accurately, then divide and use native toFixed():
|
|
return (Math.round(lib.unformat(value) * power) / power).toFixed(precision);
|
|
};
|
|
|
|
|
|
/**
|
|
* Format a number, with comma-separated thousands and custom precision/decimal places
|
|
* Alias: `accounting.format()`
|
|
*
|
|
* Localise by overriding the precision and thousand / decimal separators
|
|
* 2nd parameter `precision` can be an object matching `settings.number`
|
|
*/
|
|
var formatNumber = lib.formatNumber = lib.format = function(number, precision, thousand, decimal) {
|
|
// Resursively format arrays:
|
|
if (isArray(number)) {
|
|
return map(number, function(val) {
|
|
return formatNumber(val, precision, thousand, decimal);
|
|
});
|
|
}
|
|
|
|
// Clean up number:
|
|
number = unformat(number);
|
|
|
|
// Build options object from second param (if object) or all params, extending defaults:
|
|
var opts = defaults(
|
|
(isObject(precision) ? precision : {
|
|
precision : precision,
|
|
thousand : thousand,
|
|
decimal : decimal
|
|
}),
|
|
lib.settings.number
|
|
),
|
|
|
|
// Clean up precision
|
|
usePrecision = checkPrecision(opts.precision),
|
|
|
|
// Do some calc:
|
|
negative = number < 0 ? "-" : "",
|
|
base = parseInt(toFixed(Math.abs(number || 0), usePrecision), 10) + "",
|
|
mod = base.length > 3 ? base.length % 3 : 0;
|
|
|
|
// Format the number:
|
|
return negative + (mod ? base.substr(0, mod) + opts.thousand : "") + base.substr(mod).replace(/(\d{3})(?=\d)/g, "$1" + opts.thousand) + (usePrecision ? opts.decimal + toFixed(Math.abs(number), usePrecision).split('.')[1] : "");
|
|
};
|
|
|
|
|
|
/**
|
|
* Format a number into currency
|
|
*
|
|
* Usage: accounting.formatMoney(number, symbol, precision, thousandsSep, decimalSep, format)
|
|
* defaults: (0, "$", 2, ",", ".", "%s%v")
|
|
*
|
|
* Localise by overriding the symbol, precision, thousand / decimal separators and format
|
|
* Second param can be an object matching `settings.currency` which is the easiest way.
|
|
*
|
|
* To do: tidy up the parameters
|
|
*/
|
|
var formatMoney = lib.formatMoney = function(number, symbol, precision, thousand, decimal, format) {
|
|
// Resursively format arrays:
|
|
if (isArray(number)) {
|
|
return map(number, function(val){
|
|
return formatMoney(val, symbol, precision, thousand, decimal, format);
|
|
});
|
|
}
|
|
|
|
// Clean up number:
|
|
number = unformat(number);
|
|
|
|
// Build options object from second param (if object) or all params, extending defaults:
|
|
var opts = defaults(
|
|
(isObject(symbol) ? symbol : {
|
|
symbol : symbol,
|
|
precision : precision,
|
|
thousand : thousand,
|
|
decimal : decimal,
|
|
format : format
|
|
}),
|
|
lib.settings.currency
|
|
),
|
|
|
|
// Check format (returns object with pos, neg and zero):
|
|
formats = checkCurrencyFormat(opts.format),
|
|
|
|
// Choose which format to use for this value:
|
|
useFormat = number > 0 ? formats.pos : number < 0 ? formats.neg : formats.zero;
|
|
|
|
// Return with currency symbol added:
|
|
return useFormat.replace('%s', opts.symbol).replace('%v', formatNumber(Math.abs(number), checkPrecision(opts.precision), opts.thousand, opts.decimal));
|
|
};
|
|
|
|
|
|
/**
|
|
* Format a list of numbers into an accounting column, padding with whitespace
|
|
* to line up currency symbols, thousand separators and decimals places
|
|
*
|
|
* List should be an array of numbers
|
|
* Second parameter can be an object containing keys that match the params
|
|
*
|
|
* Returns array of accouting-formatted number strings of same length
|
|
*
|
|
* NB: `white-space:pre` CSS rule is required on the list container to prevent
|
|
* browsers from collapsing the whitespace in the output strings.
|
|
*/
|
|
lib.formatColumn = function(list, symbol, precision, thousand, decimal, format) {
|
|
if (!list) return [];
|
|
|
|
// Build options object from second param (if object) or all params, extending defaults:
|
|
var opts = defaults(
|
|
(isObject(symbol) ? symbol : {
|
|
symbol : symbol,
|
|
precision : precision,
|
|
thousand : thousand,
|
|
decimal : decimal,
|
|
format : format
|
|
}),
|
|
lib.settings.currency
|
|
),
|
|
|
|
// Check format (returns object with pos, neg and zero), only need pos for now:
|
|
formats = checkCurrencyFormat(opts.format),
|
|
|
|
// Whether to pad at start of string or after currency symbol:
|
|
padAfterSymbol = formats.pos.indexOf("%s") < formats.pos.indexOf("%v") ? true : false,
|
|
|
|
// Store value for the length of the longest string in the column:
|
|
maxLength = 0,
|
|
|
|
// Format the list according to options, store the length of the longest string:
|
|
formatted = map(list, function(val, i) {
|
|
if (isArray(val)) {
|
|
// Recursively format columns if list is a multi-dimensional array:
|
|
return lib.formatColumn(val, opts);
|
|
} else {
|
|
// Clean up the value
|
|
val = unformat(val);
|
|
|
|
// Choose which format to use for this value (pos, neg or zero):
|
|
var useFormat = val > 0 ? formats.pos : val < 0 ? formats.neg : formats.zero,
|
|
|
|
// Format this value, push into formatted list and save the length:
|
|
fVal = useFormat.replace('%s', opts.symbol).replace('%v', formatNumber(Math.abs(val), checkPrecision(opts.precision), opts.thousand, opts.decimal));
|
|
|
|
if (fVal.length > maxLength) maxLength = fVal.length;
|
|
return fVal;
|
|
}
|
|
});
|
|
|
|
// Pad each number in the list and send back the column of numbers:
|
|
return map(formatted, function(val, i) {
|
|
// Only if this is a string (not a nested array, which would have already been padded):
|
|
if (isString(val) && val.length < maxLength) {
|
|
// Depending on symbol position, pad after symbol or at index 0:
|
|
return padAfterSymbol ? val.replace(opts.symbol, opts.symbol+(new Array(maxLength - val.length + 1).join(" "))) : (new Array(maxLength - val.length + 1).join(" ")) + val;
|
|
}
|
|
return val;
|
|
});
|
|
};
|
|
|
|
|
|
/* --- Module Definition --- */
|
|
|
|
// Export accounting for CommonJS. If being loaded as an AMD module, define it as such.
|
|
// Otherwise, just add `accounting` to the global object
|
|
if (typeof exports !== 'undefined') {
|
|
if (typeof module !== 'undefined' && module.exports) {
|
|
exports = module.exports = lib;
|
|
}
|
|
exports.accounting = lib;
|
|
} else if (typeof define === 'function' && define.amd) {
|
|
// Return the library as an AMD module:
|
|
define([], function() {
|
|
return lib;
|
|
});
|
|
} else {
|
|
// Use accounting.noConflict to restore `accounting` back to its original value.
|
|
// Returns a reference to the library's `accounting` object;
|
|
// e.g. `var numbers = accounting.noConflict();`
|
|
lib.noConflict = (function(oldAccounting) {
|
|
return function() {
|
|
// Reset the value of the root's `accounting` variable:
|
|
root.accounting = oldAccounting;
|
|
// Delete the noConflict method:
|
|
lib.noConflict = undefined;
|
|
// Return reference to the library to re-assign it:
|
|
return lib;
|
|
};
|
|
})(root.accounting);
|
|
|
|
// Declare `fx` on the root (global/window) object:
|
|
root['accounting'] = lib;
|
|
}
|
|
|
|
// Root will be `window` in browser or `global` on the server:
|
|
}(this));
|