mirror of
https://github.com/idanoo/GoScrobble.git
synced 2024-11-25 01:45:15 +00:00
427 lines
11 KiB
JavaScript
427 lines
11 KiB
JavaScript
var isarray = require('isarray')
|
|
|
|
/**
|
|
* Expose `pathToRegexp`.
|
|
*/
|
|
module.exports = pathToRegexp
|
|
module.exports.parse = parse
|
|
module.exports.compile = compile
|
|
module.exports.tokensToFunction = tokensToFunction
|
|
module.exports.tokensToRegExp = tokensToRegExp
|
|
|
|
/**
|
|
* The main path matching regexp utility.
|
|
*
|
|
* @type {RegExp}
|
|
*/
|
|
var PATH_REGEXP = new RegExp([
|
|
// Match escaped characters that would otherwise appear in future matches.
|
|
// This allows the user to escape special characters that won't transform.
|
|
'(\\\\.)',
|
|
// Match Express-style parameters and un-named parameters with a prefix
|
|
// and optional suffixes. Matches appear as:
|
|
//
|
|
// "/:test(\\d+)?" => ["/", "test", "\d+", undefined, "?", undefined]
|
|
// "/route(\\d+)" => [undefined, undefined, undefined, "\d+", undefined, undefined]
|
|
// "/*" => ["/", undefined, undefined, undefined, undefined, "*"]
|
|
'([\\/.])?(?:(?:\\:(\\w+)(?:\\(((?:\\\\.|[^\\\\()])+)\\))?|\\(((?:\\\\.|[^\\\\()])+)\\))([+*?])?|(\\*))'
|
|
].join('|'), 'g')
|
|
|
|
/**
|
|
* Parse a string for the raw tokens.
|
|
*
|
|
* @param {string} str
|
|
* @param {Object=} options
|
|
* @return {!Array}
|
|
*/
|
|
function parse (str, options) {
|
|
var tokens = []
|
|
var key = 0
|
|
var index = 0
|
|
var path = ''
|
|
var defaultDelimiter = options && options.delimiter || '/'
|
|
var res
|
|
|
|
while ((res = PATH_REGEXP.exec(str)) != null) {
|
|
var m = res[0]
|
|
var escaped = res[1]
|
|
var offset = res.index
|
|
path += str.slice(index, offset)
|
|
index = offset + m.length
|
|
|
|
// Ignore already escaped sequences.
|
|
if (escaped) {
|
|
path += escaped[1]
|
|
continue
|
|
}
|
|
|
|
var next = str[index]
|
|
var prefix = res[2]
|
|
var name = res[3]
|
|
var capture = res[4]
|
|
var group = res[5]
|
|
var modifier = res[6]
|
|
var asterisk = res[7]
|
|
|
|
// Push the current path onto the tokens.
|
|
if (path) {
|
|
tokens.push(path)
|
|
path = ''
|
|
}
|
|
|
|
var partial = prefix != null && next != null && next !== prefix
|
|
var repeat = modifier === '+' || modifier === '*'
|
|
var optional = modifier === '?' || modifier === '*'
|
|
var delimiter = res[2] || defaultDelimiter
|
|
var pattern = capture || group
|
|
|
|
tokens.push({
|
|
name: name || key++,
|
|
prefix: prefix || '',
|
|
delimiter: delimiter,
|
|
optional: optional,
|
|
repeat: repeat,
|
|
partial: partial,
|
|
asterisk: !!asterisk,
|
|
pattern: pattern ? escapeGroup(pattern) : (asterisk ? '.*' : '[^' + escapeString(delimiter) + ']+?')
|
|
})
|
|
}
|
|
|
|
// Match any characters still remaining.
|
|
if (index < str.length) {
|
|
path += str.substr(index)
|
|
}
|
|
|
|
// If the path exists, push it onto the end.
|
|
if (path) {
|
|
tokens.push(path)
|
|
}
|
|
|
|
return tokens
|
|
}
|
|
|
|
/**
|
|
* Compile a string to a template function for the path.
|
|
*
|
|
* @param {string} str
|
|
* @param {Object=} options
|
|
* @return {!function(Object=, Object=)}
|
|
*/
|
|
function compile (str, options) {
|
|
return tokensToFunction(parse(str, options), options)
|
|
}
|
|
|
|
/**
|
|
* Prettier encoding of URI path segments.
|
|
*
|
|
* @param {string}
|
|
* @return {string}
|
|
*/
|
|
function encodeURIComponentPretty (str) {
|
|
return encodeURI(str).replace(/[\/?#]/g, function (c) {
|
|
return '%' + c.charCodeAt(0).toString(16).toUpperCase()
|
|
})
|
|
}
|
|
|
|
/**
|
|
* Encode the asterisk parameter. Similar to `pretty`, but allows slashes.
|
|
*
|
|
* @param {string}
|
|
* @return {string}
|
|
*/
|
|
function encodeAsterisk (str) {
|
|
return encodeURI(str).replace(/[?#]/g, function (c) {
|
|
return '%' + c.charCodeAt(0).toString(16).toUpperCase()
|
|
})
|
|
}
|
|
|
|
/**
|
|
* Expose a method for transforming tokens into the path function.
|
|
*/
|
|
function tokensToFunction (tokens, options) {
|
|
// Compile all the tokens into regexps.
|
|
var matches = new Array(tokens.length)
|
|
|
|
// Compile all the patterns before compilation.
|
|
for (var i = 0; i < tokens.length; i++) {
|
|
if (typeof tokens[i] === 'object') {
|
|
matches[i] = new RegExp('^(?:' + tokens[i].pattern + ')$', flags(options))
|
|
}
|
|
}
|
|
|
|
return function (obj, opts) {
|
|
var path = ''
|
|
var data = obj || {}
|
|
var options = opts || {}
|
|
var encode = options.pretty ? encodeURIComponentPretty : encodeURIComponent
|
|
|
|
for (var i = 0; i < tokens.length; i++) {
|
|
var token = tokens[i]
|
|
|
|
if (typeof token === 'string') {
|
|
path += token
|
|
|
|
continue
|
|
}
|
|
|
|
var value = data[token.name]
|
|
var segment
|
|
|
|
if (value == null) {
|
|
if (token.optional) {
|
|
// Prepend partial segment prefixes.
|
|
if (token.partial) {
|
|
path += token.prefix
|
|
}
|
|
|
|
continue
|
|
} else {
|
|
throw new TypeError('Expected "' + token.name + '" to be defined')
|
|
}
|
|
}
|
|
|
|
if (isarray(value)) {
|
|
if (!token.repeat) {
|
|
throw new TypeError('Expected "' + token.name + '" to not repeat, but received `' + JSON.stringify(value) + '`')
|
|
}
|
|
|
|
if (value.length === 0) {
|
|
if (token.optional) {
|
|
continue
|
|
} else {
|
|
throw new TypeError('Expected "' + token.name + '" to not be empty')
|
|
}
|
|
}
|
|
|
|
for (var j = 0; j < value.length; j++) {
|
|
segment = encode(value[j])
|
|
|
|
if (!matches[i].test(segment)) {
|
|
throw new TypeError('Expected all "' + token.name + '" to match "' + token.pattern + '", but received `' + JSON.stringify(segment) + '`')
|
|
}
|
|
|
|
path += (j === 0 ? token.prefix : token.delimiter) + segment
|
|
}
|
|
|
|
continue
|
|
}
|
|
|
|
segment = token.asterisk ? encodeAsterisk(value) : encode(value)
|
|
|
|
if (!matches[i].test(segment)) {
|
|
throw new TypeError('Expected "' + token.name + '" to match "' + token.pattern + '", but received "' + segment + '"')
|
|
}
|
|
|
|
path += token.prefix + segment
|
|
}
|
|
|
|
return path
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Escape a regular expression string.
|
|
*
|
|
* @param {string} str
|
|
* @return {string}
|
|
*/
|
|
function escapeString (str) {
|
|
return str.replace(/([.+*?=^!:${}()[\]|\/\\])/g, '\\$1')
|
|
}
|
|
|
|
/**
|
|
* Escape the capturing group by escaping special characters and meaning.
|
|
*
|
|
* @param {string} group
|
|
* @return {string}
|
|
*/
|
|
function escapeGroup (group) {
|
|
return group.replace(/([=!:$\/()])/g, '\\$1')
|
|
}
|
|
|
|
/**
|
|
* Attach the keys as a property of the regexp.
|
|
*
|
|
* @param {!RegExp} re
|
|
* @param {Array} keys
|
|
* @return {!RegExp}
|
|
*/
|
|
function attachKeys (re, keys) {
|
|
re.keys = keys
|
|
return re
|
|
}
|
|
|
|
/**
|
|
* Get the flags for a regexp from the options.
|
|
*
|
|
* @param {Object} options
|
|
* @return {string}
|
|
*/
|
|
function flags (options) {
|
|
return options && options.sensitive ? '' : 'i'
|
|
}
|
|
|
|
/**
|
|
* Pull out keys from a regexp.
|
|
*
|
|
* @param {!RegExp} path
|
|
* @param {!Array} keys
|
|
* @return {!RegExp}
|
|
*/
|
|
function regexpToRegexp (path, keys) {
|
|
// Use a negative lookahead to match only capturing groups.
|
|
var groups = path.source.match(/\((?!\?)/g)
|
|
|
|
if (groups) {
|
|
for (var i = 0; i < groups.length; i++) {
|
|
keys.push({
|
|
name: i,
|
|
prefix: null,
|
|
delimiter: null,
|
|
optional: false,
|
|
repeat: false,
|
|
partial: false,
|
|
asterisk: false,
|
|
pattern: null
|
|
})
|
|
}
|
|
}
|
|
|
|
return attachKeys(path, keys)
|
|
}
|
|
|
|
/**
|
|
* Transform an array into a regexp.
|
|
*
|
|
* @param {!Array} path
|
|
* @param {Array} keys
|
|
* @param {!Object} options
|
|
* @return {!RegExp}
|
|
*/
|
|
function arrayToRegexp (path, keys, options) {
|
|
var parts = []
|
|
|
|
for (var i = 0; i < path.length; i++) {
|
|
parts.push(pathToRegexp(path[i], keys, options).source)
|
|
}
|
|
|
|
var regexp = new RegExp('(?:' + parts.join('|') + ')', flags(options))
|
|
|
|
return attachKeys(regexp, keys)
|
|
}
|
|
|
|
/**
|
|
* Create a path regexp from string input.
|
|
*
|
|
* @param {string} path
|
|
* @param {!Array} keys
|
|
* @param {!Object} options
|
|
* @return {!RegExp}
|
|
*/
|
|
function stringToRegexp (path, keys, options) {
|
|
return tokensToRegExp(parse(path, options), keys, options)
|
|
}
|
|
|
|
/**
|
|
* Expose a function for taking tokens and returning a RegExp.
|
|
*
|
|
* @param {!Array} tokens
|
|
* @param {(Array|Object)=} keys
|
|
* @param {Object=} options
|
|
* @return {!RegExp}
|
|
*/
|
|
function tokensToRegExp (tokens, keys, options) {
|
|
if (!isarray(keys)) {
|
|
options = /** @type {!Object} */ (keys || options)
|
|
keys = []
|
|
}
|
|
|
|
options = options || {}
|
|
|
|
var strict = options.strict
|
|
var end = options.end !== false
|
|
var route = ''
|
|
|
|
// Iterate over the tokens and create our regexp string.
|
|
for (var i = 0; i < tokens.length; i++) {
|
|
var token = tokens[i]
|
|
|
|
if (typeof token === 'string') {
|
|
route += escapeString(token)
|
|
} else {
|
|
var prefix = escapeString(token.prefix)
|
|
var capture = '(?:' + token.pattern + ')'
|
|
|
|
keys.push(token)
|
|
|
|
if (token.repeat) {
|
|
capture += '(?:' + prefix + capture + ')*'
|
|
}
|
|
|
|
if (token.optional) {
|
|
if (!token.partial) {
|
|
capture = '(?:' + prefix + '(' + capture + '))?'
|
|
} else {
|
|
capture = prefix + '(' + capture + ')?'
|
|
}
|
|
} else {
|
|
capture = prefix + '(' + capture + ')'
|
|
}
|
|
|
|
route += capture
|
|
}
|
|
}
|
|
|
|
var delimiter = escapeString(options.delimiter || '/')
|
|
var endsWithDelimiter = route.slice(-delimiter.length) === delimiter
|
|
|
|
// In non-strict mode we allow a slash at the end of match. If the path to
|
|
// match already ends with a slash, we remove it for consistency. The slash
|
|
// is valid at the end of a path match, not in the middle. This is important
|
|
// in non-ending mode, where "/test/" shouldn't match "/test//route".
|
|
if (!strict) {
|
|
route = (endsWithDelimiter ? route.slice(0, -delimiter.length) : route) + '(?:' + delimiter + '(?=$))?'
|
|
}
|
|
|
|
if (end) {
|
|
route += '$'
|
|
} else {
|
|
// In non-ending mode, we need the capturing groups to match as much as
|
|
// possible by using a positive lookahead to the end or next path segment.
|
|
route += strict && endsWithDelimiter ? '' : '(?=' + delimiter + '|$)'
|
|
}
|
|
|
|
return attachKeys(new RegExp('^' + route, flags(options)), keys)
|
|
}
|
|
|
|
/**
|
|
* Normalize the given path string, returning a regular expression.
|
|
*
|
|
* An empty array can be passed in for the keys, which will hold the
|
|
* placeholder key descriptions. For example, using `/user/:id`, `keys` will
|
|
* contain `[{ name: 'id', delimiter: '/', optional: false, repeat: false }]`.
|
|
*
|
|
* @param {(string|RegExp|Array)} path
|
|
* @param {(Array|Object)=} keys
|
|
* @param {Object=} options
|
|
* @return {!RegExp}
|
|
*/
|
|
function pathToRegexp (path, keys, options) {
|
|
if (!isarray(keys)) {
|
|
options = /** @type {!Object} */ (keys || options)
|
|
keys = []
|
|
}
|
|
|
|
options = options || {}
|
|
|
|
if (path instanceof RegExp) {
|
|
return regexpToRegexp(path, /** @type {!Array} */ (keys))
|
|
}
|
|
|
|
if (isarray(path)) {
|
|
return arrayToRegexp(/** @type {!Array} */ (path), /** @type {!Array} */ (keys), options)
|
|
}
|
|
|
|
return stringToRegexp(/** @type {string} */ (path), /** @type {!Array} */ (keys), options)
|
|
}
|