52 lines
1.6 KiB
JavaScript
52 lines
1.6 KiB
JavaScript
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function matchArg (haystack, args) {
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var argMatch = haystack.match(/:(.+)/);
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if (argMatch === null) {
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throw new Error('Malformed argument: ' + haystack);
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}
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var argName = argMatch[1];
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var argValue = args[argName];
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if (argValue === undefined) {
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throw new Error('No value provided for argument: ' + argName);
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}
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return haystack.replace(':' + argName, argValue);
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}
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function findArg (haystack) {
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var argMatch = haystack.match(/:(.+)/);
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return argMatch === null ? null : argMatch[1];
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}
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module.exports = function (route, args) {
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var optionalMatch = route.match(/\(.+\)+/);
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var optionalArg = optionalMatch !== null ? optionalMatch[0] : null;
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var cleanRoute = optionalArg !== null ? route.replace(optionalArg, '') : route;
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// Return route without optional arguments if no args were provided
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if (!args) return cleanRoute;
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// Find out if there's an optional argument provided, and if so, turn it into a regular one
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if (optionalArg !== null) {
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// Replace ( and ) with nothing, need the g to apply throughout the string
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optionalArg = optionalArg.replace(/\(|\)/g, '');
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var optionalArgName = findArg(optionalArg);
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if (args[optionalArgName]) {
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// append the optional arg without parenthesis
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cleanRoute += optionalArg.replace(/\(|\)/g, '');
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}
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}
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return cleanRoute
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// Split all url arguments
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.split(/(:[^\/]+)/g)
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// replace all arguments with the provided value
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.map(function (fragment) {
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return fragment.indexOf(':') === 0 ? matchArg(fragment, args) : fragment;
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})
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// join them again
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.join('');
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};
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