Begin implementing all the PDU storage stuff in Events land

synapse/storage/signatures.py

@@ -153,3 +153,130 @@ class SignatureStore(SQLBaseStore):
             "algorithm": algorithm,
             "hash": buffer(hash_bytes),
         })
+
+    ## Events ##
+
+    def _get_event_content_hashes_txn(self, txn, event_id):
+        """Get all the hashes for a given Event.
+        Args:
+            txn (cursor):
+            event_id (str): Id for the Event.
+        Returns:
+            A dict of algorithm -> hash.
+        """
+        query = (
+            "SELECT algorithm, hash"
+            " FROM event_content_hashes"
+            " WHERE event_id = ?"
+        )
+        txn.execute(query, (event_id, ))
+        return dict(txn.fetchall())
+
+    def _store_event_content_hash_txn(self, txn, event_id, algorithm,
+                                    hash_bytes):
+        """Store a hash for a Event
+        Args:
+            txn (cursor):
+            event_id (str): Id for the Event.
+            algorithm (str): Hashing algorithm.
+            hash_bytes (bytes): Hash function output bytes.
+        """
+        self._simple_insert_txn(txn, "event_content_hashes", {
+            "event_id": event_id,
+            "algorithm": algorithm,
+            "hash": buffer(hash_bytes),
+        })
+
+    def _get_event_reference_hashes_txn(self, txn, event_id):
+        """Get all the hashes for a given PDU.
+        Args:
+            txn (cursor):
+            event_id (str): Id for the Event.
+        Returns:
+            A dict of algorithm -> hash.
+        """
+        query = (
+            "SELECT algorithm, hash"
+            " FROM event_reference_hashes"
+            " WHERE event_id = ?"
+        )
+        txn.execute(query, (event_id, ))
+        return dict(txn.fetchall())
+
+    def _store_event_reference_hash_txn(self, txn, event_id, algorithm,
+                                      hash_bytes):
+        """Store a hash for a PDU
+        Args:
+            txn (cursor):
+            event_id (str): Id for the Event.
+            algorithm (str): Hashing algorithm.
+            hash_bytes (bytes): Hash function output bytes.
+        """
+        self._simple_insert_txn(txn, "event_reference_hashes", {
+            "event_id": event_id,
+            "algorithm": algorithm,
+            "hash": buffer(hash_bytes),
+        })
+
+
+    def _get_event_origin_signatures_txn(self, txn, event_id):
+        """Get all the signatures for a given PDU.
+        Args:
+            txn (cursor):
+            event_id (str): Id for the Event.
+        Returns:
+            A dict of key_id -> signature_bytes.
+        """
+        query = (
+            "SELECT key_id, signature"
+            " FROM event_origin_signatures"
+            " WHERE event_id = ? "
+        )
+        txn.execute(query, (event_id, ))
+        return dict(txn.fetchall())
+
+    def _store_event_origin_signature_txn(self, txn, event_id, origin, key_id,
+                                          signature_bytes):
+        """Store a signature from the origin server for a PDU.
+        Args:
+            txn (cursor):
+            event_id (str): Id for the Event.
+            origin (str): origin of the Event.
+            key_id (str): Id for the signing key.
+            signature (bytes): The signature.
+        """
+        self._simple_insert_txn(txn, "event_origin_signatures", {
+            "event_id": event_id,
+            "origin": origin,
+            "key_id": key_id,
+            "signature": buffer(signature_bytes),
+        })
+
+    def _get_prev_event_hashes_txn(self, txn, event_id):
+        """Get all the hashes for previous PDUs of a PDU
+        Args:
+            txn (cursor):
+            event_id (str): Id for the Event.
+        Returns:
+            dict of (pdu_id, origin) -> dict of algorithm -> hash_bytes.
+        """
+        query = (
+            "SELECT prev_event_id, algorithm, hash"
+            " FROM event_edge_hashes"
+            " WHERE event_id = ?"
+        )
+        txn.execute(query, (event_id, ))
+        results = {}
+        for prev_event_id, algorithm, hash_bytes in txn.fetchall():
+            hashes = results.setdefault(prev_event_id, {})
+            hashes[algorithm] = hash_bytes
+        return results
+
+    def _store_prev_event_hash_txn(self, txn, event_id, prev_event_id,
+                                 algorithm, hash_bytes):
+        self._simple_insert_txn(txn, "event_edge_hashes", {
+            "event_id": event_id,
+            "prev_event_id": prev_event_id,
+            "algorithm": algorithm,
+            "hash": buffer(hash_bytes),
+        })