Refactor into plugin.

data/schema.sql

@@ -0,0 +1,21 @@
+-- Channel Linker {{{
+
+CREATE TABLE links(
+  linkid SERIAL PRIMARY KEY,
+  name TEXT
+);
+
+CREATE TABLE channel_webhooks(
+  channelid BIGINT PRIMARY KEY,
+  webhookid BIGINT NOT NULL,
+  token TEXT NOT NULL
+);
+
+CREATE TABLE channel_links(
+  linkid INTEGER NOT NULL REFERENCES links (linkid) ON DELETE CASCADE,
+  channelid BIGINT NOT NULL REFERENCES channel_webhooks (channelid) ON DELETE CASCADE,
+  PRIMARY KEY (linkid, channelid)
+);
+
+
+-- }}}