| 1 | (function() {
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| 2 | var create, createFake,
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| 3 | slice = [].slice;
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| 4 |
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| 5 | exports.create = create = function(cb) {
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| 6 | var children, complete, completed, opened, savedArgs, savedErr;
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| 7 | opened = false;
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| 8 | completed = false;
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| 9 | children = 0;
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| 10 | savedErr = false;
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| 11 | savedArgs = [];
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| 12 | complete = function() {
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| 13 | var args, isErr;
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| 14 | isErr = arguments[0], args = 2 <= arguments.length ? slice.call(arguments, 1) : [];
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| 15 | completed = true;
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| 16 | savedErr = isErr;
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| 17 | savedArgs = args;
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| 18 | if (children === 0) {
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| 19 | return cb.apply(null, [isErr].concat(slice.call(args)));
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| 20 | }
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| 21 | };
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| 22 | return {
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| 23 | error: function() {
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| 24 | var args;
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| 25 | args = 1 <= arguments.length ? slice.call(arguments, 0) : [];
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| 26 | if (completed || opened) {
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| 27 | return;
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| 28 | }
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| 29 | return complete.apply(null, [true].concat(slice.call(args)));
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| 30 | },
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| 31 | open: function() {
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| 32 | if (completed) {
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| 33 | return;
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| 34 | }
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| 35 | return opened = true;
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| 36 | },
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| 37 | close: function() {
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| 38 | var args;
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| 39 | args = 1 <= arguments.length ? slice.call(arguments, 0) : [];
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| 40 | if (completed) {
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| 41 | return;
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| 42 | }
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| 43 | return complete.apply(null, [false].concat(slice.call(args)));
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| 44 | },
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| 45 | branch: function() {
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| 46 | var child;
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| 47 | if (completed || !opened) {
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| 48 | return createFake();
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| 49 | }
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| 50 | ++children;
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| 51 | child = create(function(isErr) {
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| 52 | --children;
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| 53 | savedErr = savedErr || isErr;
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| 54 | if (completed && children === 0) {
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| 55 | return cb.apply(null, [savedErr].concat(slice.call(savedArgs)));
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| 56 | }
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| 57 | });
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| 58 | return child;
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| 59 | }
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| 60 | };
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| 61 | };
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| 62 |
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| 63 | createFake = function() {
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| 64 | return {
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| 65 | error: function() {},
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| 66 | open: function() {},
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| 67 | close: function() {},
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| 68 | branch: function() {
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| 69 | return createFake();
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| 70 | }
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| 71 | };
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| 72 | };
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| 73 |
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| 74 | }).call(this);
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