Represent channels and messages using a split "History" and "Snapshot" model.

This separates the code that figures out what happened to an entity from the code that represents it to a user, and makes it easier to compute a snapshot at a point in time (for things like bootstrap). It also makes the internal logic a bit easier to follow, since it's easier to tell whether you're working with a point in time or with the whole recorded history.

This hefty.

1 files changed, 62 insertions, 0 deletions

diff --git a/.sqlx/query-5c53579fa431b6e184faf94eedb8229360ba78f2607d25e7e2ee5db5c759a5a3.json b/.sqlx/query-5c53579fa431b6e184faf94eedb8229360ba78f2607d25e7e2ee5db5c759a5a3.json
new file mode 100644
index 0000000..4ca6786
--- /dev/null
+++ b/.sqlx/query-5c53579fa431b6e184faf94eedb8229360ba78f2607d25e7e2ee5db5c759a5a3.json
@@ -0,0 +1,62 @@
+{
+  "db_name": "SQLite",
+  "query": "\n                select\n                    channel.id as \"channel_id: channel::Id\",\n                    channel.name as \"channel_name\",\n                    sender.id as \"sender_id: login::Id\",\n                    sender.name as \"sender_name\",\n                    message.id as \"id: Id\",\n                    message.body,\n                    sent_at as \"sent_at: DateTime\",\n                    sent_sequence as \"sent_sequence: Sequence\"\n                from message\n                    join channel on message.channel = channel.id\n                    join login as sender on message.sender = sender.id\n                where coalesce(message.sent_sequence > $1, true)\n            ",
+  "describe": {
+    "columns": [
+      {
+        "name": "channel_id: channel::Id",
+        "ordinal": 0,
+        "type_info": "Text"
+      },
+      {
+        "name": "channel_name",
+        "ordinal": 1,
+        "type_info": "Text"
+      },
+      {
+        "name": "sender_id: login::Id",
+        "ordinal": 2,
+        "type_info": "Text"
+      },
+      {
+        "name": "sender_name",
+        "ordinal": 3,
+        "type_info": "Text"
+      },
+      {
+        "name": "id: Id",
+        "ordinal": 4,
+        "type_info": "Text"
+      },
+      {
+        "name": "body",
+        "ordinal": 5,
+        "type_info": "Text"
+      },
+      {
+        "name": "sent_at: DateTime",
+        "ordinal": 6,
+        "type_info": "Text"
+      },
+      {
+        "name": "sent_sequence: Sequence",
+        "ordinal": 7,
+        "type_info": "Integer"
+      }
+    ],
+    "parameters": {
+      "Right": 1
+    },
+    "nullable": [
+      false,
+      false,
+      false,
+      false,
+      false,
+      false,
+      false,
+      false
+    ]
+  },
+  "hash": "5c53579fa431b6e184faf94eedb8229360ba78f2607d25e7e2ee5db5c759a5a3"
+}