Moved chromium_status to appengine/

appengine_apps/chromium_status/static/js/status_viewer/tree_entry.js

-// Copyright (c) 2009 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-/**
- * Represents a record in the tree status database.
- *
- * @param {int} timestamp Unix timestamp in milliseconds.
- * @param {string} author
- * @param {string} message
- * @param {string} general_state
- * @constructor
- */
-function Entry(timestamp, author, message, general_state) {
-  this.timestamp = timestamp;
-  this.author = author;
-  this.message = message;
-  this.general_state = general_state;
-}
-
-/**
- * Gets the tree status enumeration for this entry.
- * @return {string} One of the possible tree states.
- *
- * See Entry.TREE_STATES for the enumeration of possible values.
- */
-Entry.prototype.GetTreeState = function() {
-  return this.general_state;
-}
-
-Entry.TREE_STATES = [
-  "open",
-  "closed",
-  "throttled",
-  "maintenance", // Tree is closed (for maintenance)
-  "unknown"
-];
-
-// When building runs for display, we may insert a fake entry to fill the gaps
-// remaining in a day. These fake entries will use the magic author of "oracle"
-// to indicate that they are not real.
-Entry.AUTHOR_ORACLE = "The oracle";
-
-Entry.prototype.IsOracle = function() {
-  return this.author == Entry.AUTHOR_ORACLE;
-}
-
-/**
- * This class implements a counter for each of the tree status types.
- * Always favor this over a raw dictionary, since it is easier to fix
- * callers when new status types are added.
- */
-function StatusTotals() {
-  // Init all totals to 0.
-  this.totals_ = {};
-  for (var i = 0; i < Entry.TREE_STATES.length; ++i) {
-    this.totals_[Entry.TREE_STATES[i]] = 0;
-  }
-}
-
-StatusTotals.prototype.Increment = function(type, value) {
-  this.totals_[type] += value;
-}
-
-StatusTotals.prototype.GetOpen = function(type) {
-  return this.totals_["open"];
-}
-
-StatusTotals.prototype.GetClosed = function(type) {
-  return this.totals_["closed"] + this.totals_["maintenance"];
-}
-
-StatusTotals.prototype.GetClosedForMaintenance = function(type) {
-  return this.totals_["maintenance"];
-}
-
-StatusTotals.prototype.GetThrottled = function(type) {
-  return this.totals_["throttled"];
-}
-
-StatusTotals.prototype.GetUnknown = function(type) {
-  return this.totals_["unknown"];
-}
-
-StatusTotals.prototype.GetTotal = function(type) {
-  var total = 0;
-  for (var key in this.totals_) {
-    total += this.totals_[key];
-  }
-  return total;
-}
-
-StatusTotals.prototype.GetTotalKnown = function(type) {
-  return this.GetTotal() - this.GetUnknown();
-}
-
-/**
- * A "run" shows the time range that an entry was active for.
- *
- * In particular, it describes |entry| as having lasted from for
- * [startTime - duration, startTime).
- *
- * Note that entry.timestamp may be earlier than (startTime - duration) when we
- * are cutting runs at day boundaries.
- *
- * @param {Entry} entry
- * @param {int} startTime Unix timestamp in milliseconds when the entry *ENDS*.
- * @param {int} duration Number of milliseconds the entry is active for,
- * starting from startTime.
- * @constructor
- */
-function Run(entry, startTime, duration) {
-  this.entry = entry;
-  this.startTime = startTime;
-  this.duration = duration;
-}
-
-/**
- * Returns the end timestamp of the run (inclusive).
- * @return {int}
- */
-Run.prototype.GetEndTime = function() {
-  return this.startTime - this.duration;
-}
-
-/**
- * Builds a list of "runs" that span |timeRange|, pulling data from |entries|.
- *
- * @param {array<Entry>} entries Records sorted from most recent to oldest.
- * @param {TimeRange} timeRange
- * @return {array<Run>}
- */
-function MakeRuns(entries, timeRange) {
-  var runs = [];
-
-  for (var i = 0; i < entries.length; ++i) {
-    var prevEntry = i == 0 ? null : entries[i-1];
-    var entry = entries[i];
-    var nextEntry = i + 1 == entries.length ? null : entries[i + 1];
-
-    if (entry.timestamp > timeRange.startTime)
-      continue;
-
-    var runStartTime;
-    var duration;
-
-    if (runs.length == 0) {
-      // Connect the startTime to this entry.
-      runStartTime = timeRange.startTime;
-
-      if (!prevEntry) {
-        // We don't know what the future holds...
-        // Extrapolate current status only until the current time.
-        var curTime = (new Date()).getTime();
-        if (curTime >= timeRange.endTime && curTime < timeRange.startTime) {
-          runStartTime = Math.min(curTime, timeRange.startTime);
-        }
-      }
-    } else {
-      runStartTime = prevEntry.timestamp;
-    }
-
-    var runEndTime = entry.timestamp < timeRange.endTime ?
-        timeRange.endTime : entry.timestamp;
-
-    if (runs.length == 0 && runStartTime != timeRange.startTime) {
-      var unknownEntry = new Entry(runStartTime, Entry.AUTHOR_ORACLE,
-                                   "Your future is uncertain...", "unknown");
-      // Add an unknown filler.
-      runs.push(new Run(unknownEntry, timeRange.startTime,
-                        timeRange.startTime - runStartTime));
-    }
-
-    runs.push(new Run(entry, runStartTime, runStartTime - runEndTime));
-
-    if (runEndTime == timeRange.endTime) {
-      break;
-    }
-  }
-
-  // The runs are supposed to span the entire time range. If any data was
-  // missing add a filler run.
-  var lastEndTime = runs.length == 0 ?
-      timeRange.startTime : runs[runs.length - 1].GetEndTime();
-  if (lastEndTime != timeRange.endTime) {
-    var unknownEntry = new Entry(timeRange.endTime, Entry.AUTHOR_ORACLE,
-                                 "Missing data!", "unknown");
-    runs.push(new Run(unknownEntry, lastEndTime,
-                      lastEndTime - timeRange.endTime));
-  }
-
-  return runs;
-}