port cron and preening

common/script/api-v3/preenHistory.js

@@ -0,0 +1,64 @@
+import moment from 'moment';
+import _ from 'lodash';
+
+function _preen (newHistory, history, amount, groupBy) {
+  let groups = _.chain(history)
+    .groupBy(h => moment(h.date).format(groupBy))
+    .sortBy((h, k) => k)
+    .value();
+
+  groups = groups.slice(-amount);
+  groups.pop();
+
+  _.each(groups, (group) => {
+    newHistory.push({
+      date: moment(group[0].date).toDate(),
+      value: _.reduce(group, (m, obj) => m + obj.value, 0) / group.length,
+    });
+  });
+}
+
+// Free users:
+// Preen history for users with > 7 history entries
+// This takes an infinite array of single day entries [day day day day day...], and turns it into a condensed array
+// of averages, condensing more the further back in time we go. Eg, 7 entries each for last 7 days; 1 entry each week
+// of this month; 1 entry for each month of this year; 1 entry per previous year: [day*7 week*4 month*12 year*infinite]
+//
+// Subscribers:
+// TODO implement
+export function preenHistory (history) {
+  // TODO remember to add this to migration
+  /* history = _.filter(history, function(h) {
+    return !!h;
+  }); */
+  let newHistory = [];
+
+  _preen(newHistory, history, 50, 'YYYY');
+  _preen(newHistory, history, moment().format('MM'), 'YYYYMM');
+
+  let thisMonth = moment().format('YYYYMM');
+  newHistory = newHistory.concat(history.filter(h => {
+    return moment(h.date).format('YYYYMM') === thisMonth;
+  }));
+
+  return newHistory;
+}
+
+export function preenUserHistory (user, tasksByType, minHistLen = 7) {
+  tasksByType.habits.concat(user.dailys).forEach((task) => {
+    if (task.history.length > minHistLen) {
+      task.history = preenHistory(user, task.history);
+      task.markModified('history');
+    }
+  });
+
+  if (user.history.exp.length > minHistLen) {
+    user.history.exp = preenHistory(user, user.history.exp);
+    user.markModified('history.exp');
+  }
+
+  if (user.history.todos.length > minHistLen) {
+    user.history.todos = preenHistory(user, user.history.todos);
+    user.markModified('history.todos');
+  }
+}