From 28c046e169c5874ce066228e7f3658d02317c216 Mon Sep 17 00:00:00 2001
From: Matthias Andreas Benkard <code@mail.matthias.benkard.de>
Date: Sat, 18 Aug 2012 17:49:46 +0200
Subject: Schema: Genericize access control.

---
 migrations/6_genericize_access_control.sql | 14 ++++++++++++++
 schema.sql                                 | 24 ++++++++++++++----------
 src/mulk/benki/lazychat.clj                |  8 ++++----
 3 files changed, 32 insertions(+), 14 deletions(-)
 create mode 100644 migrations/6_genericize_access_control.sql

diff --git a/migrations/6_genericize_access_control.sql b/migrations/6_genericize_access_control.sql
new file mode 100644
index 0000000..b415d5b
--- /dev/null
+++ b/migrations/6_genericize_access_control.sql
@@ -0,0 +1,14 @@
+ALTER TABLE lazychat_targets RENAME TO post_targets;
+
+CREATE VIEW user_visible_posts AS
+   SELECT eur.user, t.message
+     FROM effective_user_roles eur, post_targets t
+    WHERE t.target = eur.role
+  UNION
+    SELECT m.owner, m.message
+    FROM posts m;
+
+CREATE OR REPLACE VIEW user_visible_lazychat_messages AS
+  SELECT uvp.user, uvp.message
+    FROM user_visible_posts uvp
+    INNER JOIN lazychat_messages lm ON lm.id = uvp.message;
diff --git a/schema.sql b/schema.sql
index c555166..ea5110f 100644
--- a/schema.sql
+++ b/schema.sql
@@ -146,15 +146,14 @@ CREATE TABLE lazychat_messages INHERITS posts (
   content     VARCHAR,
   format      VARCHAR NOT NULL,
   PRIMARY KEY(id),
-  FOREIGN KEY(author) REFERENCES users,
   CHECK (format IN ('markdown'))
 );
 
-CREATE TABLE lazychat_targets(
+CREATE TABLE post_targets(
   message INTEGER NOT NULL,
-  target  INTEGER NOT NULL,
+  post    INTEGER NOT NULL,
   PRIMARY KEY(message, target),
-  FOREIGN KEY(message) REFERENCES lazychat_messages,
+  --FOREIGN KEY(message) REFERENCES posts AND CHILDREN,
   FOREIGN KEY(target)  REFERENCES roles
 );
 
@@ -162,8 +161,8 @@ CREATE TABLE lazychat_references(
   referrer INTEGER NOT NULL,
   referee  INTEGER NOT NULL,
   PRIMARY KEY(referrer, referee),
-  FOREIGN KEY(referrer) REFERENCES lazychat_messages,
-  FOREIGN KEY(referee)  REFERENCES lazychat_messages
+  --FOREIGN KEY(referee)  REFERENCES posts AND CHILDREN,
+  FOREIGN KEY(referrer) REFERENCES lazychat_messages
 );
 
 CREATE TABLE user_default_target(
@@ -239,13 +238,18 @@ CREATE TRIGGER new_user_create_user_role
   FOR EACH ROW
   EXECUTE PROCEDURE new_user_create_user_role();
 
-CREATE VIEW user_visible_lazychat_messages AS
+CREATE VIEW user_visible_posts AS
    SELECT eur.user, t.message
-     FROM effective_user_roles eur, lazychat_targets t
+     FROM effective_user_roles eur, post_targets t
     WHERE t.target = eur.role
   UNION
-    SELECT m.author, m.message
-    FROM lazychat_messages m;
+    SELECT m.owner, m.message
+    FROM posts m;
+
+CREATE VIEW user_visible_lazychat_messages AS
+  SELECT uvp.user, uvp.message
+    FROM user_visible_posts uvp
+    INNER JOIN lazychat_messages lm ON lm.id = uvp.message;
 
 ROLLBACK;
 --COMMIT;
diff --git a/src/mulk/benki/lazychat.clj b/src/mulk/benki/lazychat.clj
index 75b0b16..fefb487 100644
--- a/src/mulk/benki/lazychat.clj
+++ b/src/mulk/benki/lazychat.clj
@@ -62,18 +62,18 @@
                              [:referrer :referee]
                              [id (int referee)]))
         (doseq [target targets]
-          (sql/insert-values :lazychat_targets
+          (sql/insert-values :post_targets
                              [:message :target]
                              [id (int target)]))
         (case visibility
           ("public")
             (sql/do-prepared
-             "INSERT INTO lazychat_targets
+             "INSERT INTO post_targets
                    SELECT ?, role FROM role_tags WHERE tag = 'world'"
              [id])
           ("protected")
             (sql/do-prepared
-             "INSERT INTO lazychat_targets
+             "INSERT INTO post_targets
                    SELECT ?, target FROM user_default_target WHERE (\"user\" = ?)"
              [id user])
           ("private")
@@ -113,7 +113,7 @@
                            WHERE id = ?"
                          id)
         referees (map :referee (query  "SELECT referee FROM lazychat_references WHERE referrer = ?" id))
-        targets  (map :target  (query  "SELECT target  FROM lazychat_targets    WHERE message = ?" id))]
+        targets  (map :target  (query  "SELECT target  FROM post_targets        WHERE message = ?" id))]
     (and message
          (assoc message
            :referees referees
-- 
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