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@deanlandolt
Created June 24, 2011 19:17
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function Pointer(value) {
if (!(this instanceof Pointer)) return new Pointer(value);
value = value.toString().split("/");
// remove a path component if all are empty
var empty = !value.some(function(i) { return i });
if (empty) value.pop();
this.path = value.map(function(part) {
return decodeURIComponent(part);
});
}
Pointer.prototype.toString = function() {
// copy resolution array
value = this.path.map(function(i) { return i});
if (!value.length) return "";
// add an empty path component if all are empty
var empty = !value.some(function(i) { return i });
if (empty) value.push("");
return value.map(function(part) {
return encodeURIComponent(part);
}).join("/");
};
Pointer.prototype.toSource = function() {
return '[' + this.path.map(function(i) {
return '"' + i + '"';
}).join('][') + ']';
};
Pointer.prototype.valueOf = function() {
return this.path;
};
module.exports = Pointer;
if (require.main === module) {
var assert = require("assert");
var pairs = [
["", []],
["/", [""]],
["/a", ["","a"]],
["/a/", ["","a",""]],
["//a", ["","","a"]],
["//a/", ["","","a",""]],
["//a//", ["","","a","",""]],
["/a//", ["","a","",""]],
["/a/", ["","a",""]],
["//", ["",""]],
["///", ["","",""]],
["a", ["a"]],
["a/", ["a",""]],
["a/b", ["a","b"]],
["a/b/", ["a","b",""]],
["a//", ["a","",""]]
];
pairs.forEach(function(pair) {
var pointer = Pointer(pair[0]);
assert.equal(pair[0], "" + pointer);
assert.deepEqual(pair[1], pointer.path);
});
}
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