Backend for team assignment

1 files changed, 106 insertions, 0 deletions

diff --git a/pysite/views/staff/jams/teams/view.py b/pysite/views/staff/jams/teams/view.py
new file mode 100644
index 00000000..c68da63e
--- /dev/null
+++ b/pysite/views/staff/jams/teams/view.py
@@ -0,0 +1,106 @@
+from rethinkdb import ReqlNonExistenceError
+from werkzeug.exceptions import NotFound
+
+from pysite.base_route import RouteView
+from pysite.constants import ALL_STAFF_ROLES
+from pysite.decorators import require_roles
+from pysite.mixins import DBMixin
+
+REQUIRED_KEYS = ("title", "date_start", "date_end")
+
+
+class StaffView(RouteView, DBMixin):
+    path = "/jams/teams/<int:jam>"
+    name = "jams.teams"
+
+    table_name = "code_jam_teams"
+
+    forms_table = "code_jam_forms"
+    jams_table = "code_jams"
+    participants_table = "code_jam_participants"
+    questions_table = "code_jam_questions"
+    responses_table = "code_jam_responses"
+    users_table = "users"
+
+    @require_roles(*ALL_STAFF_ROLES)
+    def get(self, jam: int):
+        try:
+            query = self.db.query(self.jams_table).get(jam).merge(
+                # Merge the jam document with a custom document defined below
+                lambda jam_obj: {  # The lambda lets us manipulate the jam document server-side
+                    "participants":
+                        # Query the responses table
+                        self.db.query(self.responses_table)
+                            # Filter: approved responses for this jam only  # noqa: E131
+                            .filter({"jam": jam_obj["number"], "approved": True})
+                            # Join each response document with documents from the user table that match the user that
+                            # created this response - this is the efficient way to do things, inner/outer joins
+                            # are slower as they only support explicit predicates
+                            .eq_join("snowflake", self.db.query(self.users_table))
+                            # Remove the user ID from the left side (the response document)
+                            .without({"left": ["snowflake"]})
+                            .zip()  # Combine the left and right documents together
+                            .order_by("username")  # Reorder the documents by username
+                            .coerce_to("array"),  # Coerce the document stream into an array
+                    "profiles":
+                        # Query the responses table (again)
+                        # We do this because RethinkDB just returns empty lists if you join on another join
+                        self.db.query(self.responses_table)
+                            # Filter: approved responses for this jam only  # noqa: E131
+                            .filter({"jam": jam_obj["number"], "approved": True})
+                            # Join each response document with documents from the participant profiles table
+                            # this time
+                            .eq_join("snowflake", self.db.query(self.participants_table))
+                            # Remove the user ID and answers from the left side (the response document)
+                            .without({"left": ["snowflake", "answers"]})
+                            .zip()  # Combine the left and right documents together
+                            .order_by("username")  # Reorder the documents by username
+                            .coerce_to("array"),  # Coerce the document stream into an array
+                    "form": self.db.query(self.forms_table).get(jam),  # Just get the correct form object
+                    "teams":
+                        # Query the teams table
+                        self.db.query(self.table_name)
+                            # Join the teams table against the jams table, to find all of the teams for this
+                            # specific jam - we can't simply filter because of the one-to-many relationship,
+                            # so we must use an inner join with a predicate function. This function is still
+                            # run on the server, however
+                            .inner_join(self.db.query(self.jams_table),
+                                        lambda team_row, jams_row: jams_row["teams"].contains(team_row["id"]))
+                            # Only take the ID, name and members of each team, discard everything else
+                            .pluck({"left": ["id", "name", "members"]})
+                            .zip()  # Combine the left and right documents together
+                            .coerce_to("array")  # Coerce the document stream into an array
+                }
+            )
+
+            jam_data = self.db.run(query)
+        except ReqlNonExistenceError:
+            raise NotFound()
+
+        questions = {}
+
+        for question in jam_data["form"]["questions"]:
+            questions[question] = self.db.get(self.questions_table, question)
+
+        teams = {}
+        participants = {}
+        assigned = []
+
+        for team in jam_data["teams"]:
+            teams[team["id"]] = team
+
+            for member in team["members"]:
+                assigned.append(member)
+
+        for user in jam_data["participants"]:
+            participants[user["user_id"]] = user
+
+        for profile in jam_data["profiles"]:
+            participants[profile["id"]]["profile"] = profile
+
+        return self.render(
+            "staff/jams/teams/view.html",
+            jam=jam_data, teams=teams,
+            participants=participants, assigned=assigned,
+            questions=questions
+        )