1 files changed, 56 insertions, 0 deletions
diff --git a/src/booking/stats.py b/src/booking/stats.py
new file mode 100644
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+++ b/src/booking/stats.py
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+##############################################################################
+# Copyright (c) 2018 Parker Berberian, Sawyer Bergeron, and others.
+#
+# All rights reserved. This program and the accompanying materials
+# are made available under the terms of the Apache License, Version 2.0
+# which accompanies this distribution, and is available at
+# http://www.apache.org/licenses/LICENSE-2.0
+##############################################################################
+from booking.models import Booking
+import datetime
+import pytz
+
+
+class StatisticsManager(object):
+
+    @staticmethod
+    def getContinuousBookingTimeSeries(span=28):
+        """
+        Will return a dictionary of names and 2-D array of x and y data points.
+        e.g. {"plot1": [["x1", "x2", "x3"],["y1", "y2", "y3]]}
+        x values will be dates in string
+        every change (booking start / end) will be reflected, instead of one data point per day
+        y values are the integer number of bookings/users active at some point in the given date
+        span is the number of days to plot. The last x value will always be the current time
+        """
+        x_set = set()
+        x = []
+        y = []
+        users = []
+        now = datetime.datetime.now(pytz.utc)
+        delta = datetime.timedelta(days=span)
+        end = now-delta
+        bookings = Booking.objects.filter(start__lte=now, end__gte=end)
+        for booking in bookings:
+            x_set.add(booking.start)
+            if booking.end < now:
+                x_set.add(booking.end)
+
+        x_set.add(now)
+        x_set.add(end)
+
+        x_list = list(x_set)
+        x_list.sort(reverse=True)
+        for time in x_list:
+            x.append(str(time))
+            active = Booking.objects.filter(start__lte=time, end__gt=time)
+            booking_count = len(active)
+            users_set = set()
+            for booking in active:
+                users_set.add(booking.owner)
+                for user in booking.collaborators.all():
+                    users_set.add(user)
+            y.append(booking_count)
+            users.append(len(users_set))
+
+        return {"booking": [x, y], "user": [x, users]}