Track event sequences globally, not per channel.

Per-channel event sequences were a cute idea, but it made reasoning about event resumption much, much harder (case in point: recovering the order of events in a partially-ordered collection is quadratic, since it's basically graph sort). The minor overhead of a global sequence number is likely tolerable, and this simplifies both the API and the internals.

1 files changed, 74 insertions, 0 deletions

diff --git a/.sqlx/query-7e816ede017bc2635c11ab72b18b7af92ac1f1faed9df41df90f57cb596cfe7c.json b/.sqlx/query-7e816ede017bc2635c11ab72b18b7af92ac1f1faed9df41df90f57cb596cfe7c.json
new file mode 100644
index 0000000..f546438
--- /dev/null
+++ b/.sqlx/query-7e816ede017bc2635c11ab72b18b7af92ac1f1faed9df41df90f57cb596cfe7c.json
@@ -0,0 +1,74 @@
+{
+  "db_name": "SQLite",
+  "query": "\n\t\t\t\tselect\n\t\t\t\t\tmessage.id as \"id: message::Id\",\n                    channel.id as \"channel_id: channel::Id\",\n                    channel.name as \"channel_name\",\n                    channel.created_at as \"channel_created_at: DateTime\",\n                    channel.created_sequence as \"channel_created_sequence: Sequence\",\n\t\t\t\t\tsender.id as \"sender_id: login::Id\",\n\t\t\t\t\tsender.name as sender_name,\n                    message.sent_at as \"sent_at: DateTime\",\n                    message.sent_sequence as \"sent_sequence: Sequence\",\n                    message.body\n\t\t\t\tfrom message\n                    join channel on message.channel = channel.id\n\t\t\t\t\tjoin login as sender on message.sender = sender.id\n\t\t\t\twhere coalesce(message.sent_sequence > $1, true)\n\t\t\t\torder by sent_sequence asc\n\t\t\t",
+  "describe": {
+    "columns": [
+      {
+        "name": "id: message::Id",
+        "ordinal": 0,
+        "type_info": "Text"
+      },
+      {
+        "name": "channel_id: channel::Id",
+        "ordinal": 1,
+        "type_info": "Text"
+      },
+      {
+        "name": "channel_name",
+        "ordinal": 2,
+        "type_info": "Text"
+      },
+      {
+        "name": "channel_created_at: DateTime",
+        "ordinal": 3,
+        "type_info": "Text"
+      },
+      {
+        "name": "channel_created_sequence: Sequence",
+        "ordinal": 4,
+        "type_info": "Integer"
+      },
+      {
+        "name": "sender_id: login::Id",
+        "ordinal": 5,
+        "type_info": "Text"
+      },
+      {
+        "name": "sender_name",
+        "ordinal": 6,
+        "type_info": "Text"
+      },
+      {
+        "name": "sent_at: DateTime",
+        "ordinal": 7,
+        "type_info": "Text"
+      },
+      {
+        "name": "sent_sequence: Sequence",
+        "ordinal": 8,
+        "type_info": "Integer"
+      },
+      {
+        "name": "body",
+        "ordinal": 9,
+        "type_info": "Text"
+      }
+    ],
+    "parameters": {
+      "Right": 1
+    },
+    "nullable": [
+      false,
+      false,
+      false,
+      false,
+      false,
+      false,
+      false,
+      false,
+      false,
+      false
+    ]
+  },
+  "hash": "7e816ede017bc2635c11ab72b18b7af92ac1f1faed9df41df90f57cb596cfe7c"
+}