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<link rel="import" href="../../../behaviors/gr-patch-set-behavior/gr-patch-set-behavior.html">
<script>
(function() {
'use strict';
/**
* @param {Object} change A change object resulting from a change detail
* call that includes revision information.
*/
function RevisionInfo(change) {
this._change = change;
}
/**
* Get the largest number of parents of the commit in any revision. For
* example, with normal changes this will always return 1. For merge changes
* wherein the revisions are merge commits this will return 2 or potentially
* more.
* @return {Number}
*/
RevisionInfo.prototype.getMaxParents = function() {
if (!this._change || !this._change.revisions) {
return 0;
}
return Object.values(this._change.revisions)
.reduce((acc, rev) => Math.max(rev.commit.parents.length, acc), 0);
};
/**
* Get an object that maps revision numbers to the number of parents of the
* commit of that revision.
* @return {!Object}
*/
RevisionInfo.prototype.getParentCountMap = function() {
const result = {};
if (!this._change || !this._change.revisions) {
return {};
}
Object.values(this._change.revisions)
.forEach(rev => { result[rev._number] = rev.commit.parents.length; });
return result;
};
/**
* @param {number|string} patchNum
* @return {number}
*/
RevisionInfo.prototype.getParentCount = function(patchNum) {
return this.getParentCountMap()[patchNum];
};
/**
* Get the commit ID of the (0-offset) indexed parent in the given revision
* number.
* @param {number|string} patchNum
* @param {number} parentIndex (0-offset)
* @return {string}
*/
RevisionInfo.prototype.getParentId = function(patchNum, parentIndex) {
const rev = Object.values(this._change.revisions).find(rev =>
Gerrit.PatchSetBehavior.patchNumEquals(rev._number, patchNum));
return rev.commit.parents[parentIndex].commit;
};
window.Gerrit = window.Gerrit || {};
window.Gerrit.RevisionInfo = RevisionInfo;
})();
</script>