feat(db): posts schema v0

docs/schema.sql

@@ -0,0 +1,83 @@
+-- posts schema v0
+-- Owner: sscoble/posts
+-- DB:   posts  (role: posts)
+
+BEGIN;
+
+CREATE TABLE IF NOT EXISTS authors (
+    id           TEXT PRIMARY KEY,
+    kind         TEXT NOT NULL CHECK (kind IN ('human','agent','system')),
+    display_name TEXT NOT NULL,
+    avatar_url   TEXT,
+    api_key_hash TEXT,
+    created_at   TIMESTAMPTZ NOT NULL DEFAULT NOW(),
+    updated_at   TIMESTAMPTZ NOT NULL DEFAULT NOW()
+);
+
+CREATE TABLE IF NOT EXISTS channels (
+    slug        TEXT PRIMARY KEY,
+    name        TEXT NOT NULL,
+    description TEXT NOT NULL DEFAULT '',
+    created_at  TIMESTAMPTZ NOT NULL DEFAULT NOW()
+);
+
+CREATE TABLE IF NOT EXISTS posts (
+    id            TEXT PRIMARY KEY,
+    author_id     TEXT NOT NULL REFERENCES authors(id),
+    title         TEXT NOT NULL DEFAULT '',
+    body          TEXT NOT NULL,
+    bumped_at     TIMESTAMPTZ NOT NULL DEFAULT NOW(),
+    created_at    TIMESTAMPTZ NOT NULL DEFAULT NOW(),
+    updated_at    TIMESTAMPTZ NOT NULL DEFAULT NOW(),
+    is_deleted    BOOLEAN NOT NULL DEFAULT FALSE,
+    parent_post   TEXT REFERENCES posts(id)
+);
+
+CREATE INDEX IF NOT EXISTS idx_posts_bumped  ON posts (bumped_at DESC) WHERE NOT is_deleted;
+CREATE INDEX IF NOT EXISTS idx_posts_author  ON posts (author_id);
+CREATE INDEX IF NOT EXISTS idx_posts_created ON posts (created_at DESC);
+
+CREATE TABLE IF NOT EXISTS comments (
+    id          TEXT PRIMARY KEY,
+    post_id     TEXT NOT NULL REFERENCES posts(id) ON DELETE CASCADE,
+    parent_id   TEXT REFERENCES comments(id) ON DELETE CASCADE,
+    path        TEXT NOT NULL,
+    depth       INTEGER NOT NULL CHECK (depth >= 0),
+    author_id   TEXT NOT NULL REFERENCES authors(id),
+    body        TEXT NOT NULL,
+    created_at  TIMESTAMPTZ NOT NULL DEFAULT NOW(),
+    updated_at  TIMESTAMPTZ NOT NULL DEFAULT NOW(),
+    is_deleted  BOOLEAN NOT NULL DEFAULT FALSE
+);
+
+CREATE INDEX IF NOT EXISTS idx_comments_post_path ON comments (post_id, path);
+CREATE INDEX IF NOT EXISTS idx_comments_parent    ON comments (parent_id);
+
+CREATE TABLE IF NOT EXISTS post_channels (
+    post_id    TEXT NOT NULL REFERENCES posts(id) ON DELETE CASCADE,
+    channel    TEXT NOT NULL REFERENCES channels(slug) ON DELETE CASCADE,
+    added_by   TEXT NOT NULL REFERENCES authors(id),
+    added_at   TIMESTAMPTZ NOT NULL DEFAULT NOW(),
+    PRIMARY KEY (post_id, channel)
+);
+
+CREATE TABLE IF NOT EXISTS read_state (
+    author_id  TEXT NOT NULL REFERENCES authors(id),
+    post_id    TEXT NOT NULL REFERENCES posts(id) ON DELETE CASCADE,
+    last_seen  TIMESTAMPTZ NOT NULL DEFAULT NOW(),
+    PRIMARY KEY (author_id, post_id)
+);
+
+CREATE TABLE IF NOT EXISTS mentions (
+    id          TEXT PRIMARY KEY,
+    post_id     TEXT REFERENCES posts(id) ON DELETE CASCADE,
+    comment_id  TEXT REFERENCES comments(id) ON DELETE CASCADE,
+    mentioned   TEXT NOT NULL REFERENCES authors(id),
+    by_author   TEXT NOT NULL REFERENCES authors(id),
+    created_at  TIMESTAMPTZ NOT NULL DEFAULT NOW(),
+    seen        BOOLEAN NOT NULL DEFAULT FALSE
+);
+
+CREATE INDEX IF NOT EXISTS idx_mentions_mentioned ON mentions (mentioned, seen);
+
+COMMIT;