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sample/prod/talk/bundle/mithril-2.2.2/pathname/build.js

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+"use strict"
+
+var buildQueryString = require("../querystring/build")
+var assign = require("../util/assign")
+
+// Returns `path` from `template` + `params`
+module.exports = function(template, params) {
+	if ((/:([^\/\.-]+)(\.{3})?:/).test(template)) {
+		throw new SyntaxError("Template parameter names must be separated by either a '/', '-', or '.'.")
+	}
+	if (params == null) return template
+	var queryIndex = template.indexOf("?")
+	var hashIndex = template.indexOf("#")
+	var queryEnd = hashIndex < 0 ? template.length : hashIndex
+	var pathEnd = queryIndex < 0 ? queryEnd : queryIndex
+	var path = template.slice(0, pathEnd)
+	var query = {}
+
+	assign(query, params)
+
+	var resolved = path.replace(/:([^\/\.-]+)(\.{3})?/g, function(m, key, variadic) {
+		delete query[key]
+		// If no such parameter exists, don't interpolate it.
+		if (params[key] == null) return m
+		// Escape normal parameters, but not variadic ones.
+		return variadic ? params[key] : encodeURIComponent(String(params[key]))
+	})
+
+	// In case the template substitution adds new query/hash parameters.
+	var newQueryIndex = resolved.indexOf("?")
+	var newHashIndex = resolved.indexOf("#")
+	var newQueryEnd = newHashIndex < 0 ? resolved.length : newHashIndex
+	var newPathEnd = newQueryIndex < 0 ? newQueryEnd : newQueryIndex
+	var result = resolved.slice(0, newPathEnd)
+
+	if (queryIndex >= 0) result += template.slice(queryIndex, queryEnd)
+	if (newQueryIndex >= 0) result += (queryIndex < 0 ? "?" : "&") + resolved.slice(newQueryIndex, newQueryEnd)
+	var querystring = buildQueryString(query)
+	if (querystring) result += (queryIndex < 0 && newQueryIndex < 0 ? "?" : "&") + querystring
+	if (hashIndex >= 0) result += template.slice(hashIndex)
+	if (newHashIndex >= 0) result += (hashIndex < 0 ? "" : "&") + resolved.slice(newHashIndex)
+	return result
+}