Initial commit

postgres/init/011_comment.sql

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+DROP TABLE IF EXISTS comment;
+DROP TYPE IF EXISTS comment_status;
+DROP TYPE IF EXISTS comment_context_type;
+
+CREATE TYPE comment_context_type AS ENUM (
+  'portal',
+  'dictionary',
+  'consultancy',
+  'entry_dict_int',
+  'entry_dict_ext',
+  'entry_consult_int'
+  -- 'entry_consult_ext'
+);
+
+CREATE TYPE comment_status AS ENUM ('visible', 'hidden');
+
+CREATE TABLE comment (
+  id INT GENERATED ALWAYS AS IDENTITY PRIMARY KEY,
+  message VARCHAR NOT NULL,
+  author_id INT NOT NULL REFERENCES "user",
+  time_created TIMESTAMPTZ NOT NULL DEFAULT NOW(),
+  context_type comment_context_type NOT NULL,
+  context_id INT,
+  status comment_status NOT NULL DEFAULT 'visible',
+  quoted_comment_id INT REFERENCES comment,
+  CHECK (
+    CASE
+      WHEN context_type IN (
+        'portal',
+        'consultancy'
+      ) THEN context_id IS NULL
+      ELSE context_id IS NOT NULL
+    END
+  )
+);
+
+CREATE OR REPLACE FUNCTION update_time_most_recent_comment()
+RETURNS TRIGGER AS $$
+BEGIN
+  -- Disable trigger from updating time_modified.
+  SET LOCAL term_portal.skip_update_time_modified TO 'TRUE';
+  -- Disable trigger from creating version history snapshot.
+  SET LOCAL term_portal.skip_create_version_history_snapshot TO 'TRUE';
+
+  UPDATE entry
+  SET time_most_recent_comment =
+    CASE
+      WHEN TG_OP = 'INSERT' AND NEW.status = 'visible' THEN NEW.time_created
+      ELSE (
+        SELECT MAX(time_created)
+        FROM comment
+        WHERE
+          context_type IN ('entry_dict_int', 'entry_dict_ext')
+          AND context_id = NEW.context_id
+          AND status = 'visible'
+      )
+    END
+  WHERE id = NEW.context_id;
+
+  RETURN NULL;
+END;
+$$ LANGUAGE plpgsql;
+
+CREATE TRIGGER entry_update_time_most_recent_comment
+AFTER INSERT OR UPDATE
+ON comment
+FOR EACH ROW
+WHEN (NEW.context_type IN ('entry_dict_int', 'entry_dict_ext'))
+EXECUTE FUNCTION update_time_most_recent_comment();