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/*
Copyright (c) 2012, Yahoo! Inc. All rights reserved.
Copyrights licensed under the New BSD License. See the accompanying LICENSE file for terms.
*/
var path = require('path'),
SEP = path.sep || '/',
utils = require('../object-utils');
function commonArrayPrefix(first, second) {
var len = first.length < second.length ? first.length : second.length,
i,
ret = [];
for (i = 0; i < len; i += 1) {
if (first[i] === second[i]) {
ret.push(first[i]);
} else {
break;
}
}
return ret;
}
function findCommonArrayPrefix(args) {
if (args.length === 0) {
return [];
}
var separated = args.map(function (arg) { return arg.split(SEP); }),
ret = separated.pop();
if (separated.length === 0) {
return ret.slice(0, ret.length - 1);
} else {
return separated.reduce(commonArrayPrefix, ret);
}
}
function Node(fullName, kind, metrics) {
this.name = fullName;
this.fullName = fullName;
this.kind = kind;
this.metrics = metrics || null;
this.parent = null;
this.children = [];
}
Node.prototype = {
displayShortName: function () {
return this.relativeName;
},
fullPath: function () {
return this.fullName;
},
addChild: function (child) {
this.children.push(child);
child.parent = this;
},
toJSON: function () {
return {
name: this.name,
relativeName: this.relativeName,
fullName: this.fullName,
kind: this.kind,
metrics: this.metrics,
parent: this.parent === null ? null : this.parent.name,
children: this.children.map(function (node) { return node.toJSON(); })
};
}
};
function TreeSummary(summaryMap, commonPrefix) {
this.prefix = commonPrefix;
this.convertToTree(summaryMap, commonPrefix);
}
TreeSummary.prototype = {
getNode: function (shortName) {
return this.map[shortName];
},
convertToTree: function (summaryMap, arrayPrefix) {
var nodes = [],
rootPath = arrayPrefix.join(SEP) + SEP,
root = new Node(rootPath, 'dir'),
tmp,
tmpChildren,
seen = {},
filesUnderRoot = false;
seen[rootPath] = root;
Object.keys(summaryMap).forEach(function (key) {
var metrics = summaryMap[key],
node,
parentPath,
parent;
node = new Node(key, 'file', metrics);
seen[key] = node;
nodes.push(node);
parentPath = path.dirname(key) + SEP;
if (parentPath === SEP + SEP || parentPath === '.' + SEP) {
parentPath = SEP + '__root__' + SEP;
}
parent = seen[parentPath];
if (!parent) {
parent = new Node(parentPath, 'dir');
root.addChild(parent);
seen[parentPath] = parent;
}
parent.addChild(node);
if (parent === root) { filesUnderRoot = true; }
});
if (filesUnderRoot && arrayPrefix.length > 0) {
arrayPrefix.pop(); //start at one level above
tmp = root;
tmpChildren = tmp.children;
tmp.children = [];
root = new Node(arrayPrefix.join(SEP) + SEP, 'dir');
root.addChild(tmp);
tmpChildren.forEach(function (child) {
if (child.kind === 'dir') {
root.addChild(child);
} else {
tmp.addChild(child);
}
});
}
this.fixupNodes(root, arrayPrefix.join(SEP) + SEP);
this.calculateMetrics(root);
this.root = root;
this.map = {};
this.indexAndSortTree(root, this.map);
},
fixupNodes: function (node, prefix, parent) {
var that = this;
if (node.name.indexOf(prefix) === 0) {
node.name = node.name.substring(prefix.length);
}
if (node.name.charAt(0) === SEP) {
node.name = node.name.substring(1);
}
if (parent) {
if (parent.name !== '__root__' + SEP) {
node.relativeName = node.name.substring(parent.name.length);
} else {
node.relativeName = node.name;
}
} else {
node.relativeName = node.name.substring(prefix.length);
}
node.children.forEach(function (child) {
that.fixupNodes(child, prefix, node);
});
},
calculateMetrics: function (entry) {
var that = this,
fileChildren;
if (entry.kind !== 'dir') {return; }
entry.children.forEach(function (child) {
that.calculateMetrics(child);
});
entry.metrics = utils.mergeSummaryObjects.apply(
null,
entry.children.map(function (child) { return child.metrics; })
);
// calclulate "java-style" package metrics where there is no hierarchy
// across packages
fileChildren = entry.children.filter(function (n) { return n.kind !== 'dir'; });
if (fileChildren.length > 0) {
entry.packageMetrics = utils.mergeSummaryObjects.apply(
null,
fileChildren.map(function (child) { return child.metrics; })
);
} else {
entry.packageMetrics = null;
}
},
indexAndSortTree: function (node, map) {
var that = this;
map[node.name] = node;
node.children.sort(function (a, b) {
a = a.relativeName;
b = b.relativeName;
return a < b ? -1 : a > b ? 1 : 0;
});
node.children.forEach(function (child) {
that.indexAndSortTree(child, map);
});
},
toJSON: function () {
return {
prefix: this.prefix,
root: this.root.toJSON()
};
}
};
function TreeSummarizer() {
this.summaryMap = {};
}
TreeSummarizer.prototype = {
addFileCoverageSummary: function (filePath, metrics) {
this.summaryMap[filePath] = metrics;
},
getTreeSummary: function () {
var commonArrayPrefix = findCommonArrayPrefix(Object.keys(this.summaryMap));
return new TreeSummary(this.summaryMap, commonArrayPrefix);
}
};
module.exports = TreeSummarizer;
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