diff options
Diffstat (limited to 'lib/paths.js')
| -rw-r--r-- | lib/paths.js | 42 |
1 files changed, 42 insertions, 0 deletions
diff --git a/lib/paths.js b/lib/paths.js new file mode 100644 index 000000000..5208fe457 --- /dev/null +++ b/lib/paths.js @@ -0,0 +1,42 @@ +function applyPaths(paths, name) { + // most specific (most number of slashes in path) match wins + var pathMatch = '', wildcard, maxWildcardPrefixLen = 0; + + // check to see if we have a paths entry + for (var p in paths) { + if (paths.hasOwnProperty && !paths.hasOwnProperty(p)) + continue; + + // exact path match + if (p.indexOf('*') === -1) { + if (name == p) + return paths[p]; + + // support trailing / in paths rules + else if (name.substr(0, p.length - 1) == p.substr(0, p.length - 1) && (name.length < p.length || name[p.length - 1] == p[p.length - 1]) && (paths[p][paths[p].length - 1] == '/' || paths[p] == '')) { + return paths[p].substr(0, paths[p].length - 1) + (name.length > p.length ? (paths[p] && '/' || '') + name.substr(p.length) : ''); + } + } + // wildcard path match + else { + var pathParts = p.split('*'); + if (pathParts.length > 2) + throw new TypeError('Only one wildcard in a path is permitted'); + + var wildcardPrefixLen = pathParts[0].length; + if (wildcardPrefixLen >= maxWildcardPrefixLen && + name.substr(0, pathParts[0].length) == pathParts[0] && + name.substr(name.length - pathParts[1].length) == pathParts[1]) { + maxWildcardPrefixLen = wildcardPrefixLen; + pathMatch = p; + wildcard = name.substr(pathParts[0].length, name.length - pathParts[1].length - pathParts[0].length); + } + } + } + + var outPath = paths[pathMatch]; + if (typeof wildcard == 'string') + outPath = outPath.replace('*', wildcard); + + return outPath; +}
\ No newline at end of file |