Theming (#624)

* Theming

- Custom CSS for blogs
- Custom themes for instance
- New dark theme
- UI to choose your instance theme
- Option to disable blog themes if you prefer to only have the instance theme
- UI to choose a blog theme

migrations/sqlite/2019-06-21-154916_themes/down.sql

@@ -0,0 +1,88 @@
+-- This file should undo anything in `up.sql`
+
+CREATE TABLE blogs_before_themes (
+    id INTEGER NOT NULL PRIMARY KEY AUTOINCREMENT,
+    actor_id VARCHAR NOT NULL,
+    title VARCHAR NOT NULL,
+    summary TEXT NOT NULL DEFAULT '',
+    outbox_url VARCHAR NOT NULL UNIQUE,
+    inbox_url VARCHAR NOT NULL UNIQUE,
+    instance_id INTEGER REFERENCES instances(id) ON DELETE CASCADE NOT NULL,
+    creation_date DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP,
+    ap_url text not null default '' UNIQUE,
+    private_key TEXT,
+    public_key TEXT NOT NULL DEFAULT '',
+    fqn TEXT NOT NULL DEFAULT '',
+    summary_html TEXT NOT NULL DEFAULT '',
+    icon_id INTEGER REFERENCES medias(id) ON DELETE SET NULL DEFAULT NULL,
+    banner_id INTEGER REFERENCES medias(id) ON DELETE SET NULL DEFAULT NULL,
+    CONSTRAINT blog_unique UNIQUE (actor_id, instance_id)
+);
+INSERT INTO blogs_before_themes SELECT
+	id,
+    actor_id,
+    title,
+    summary,
+    outbox_url,
+    inbox_url,
+    instance_id,
+    creation_date,
+    ap_url,
+    private_key,
+    public_key,
+    fqn,
+    summary_html,
+    icon_id,
+    banner_id
+FROM blogs;
+DROP TABLE blogs;
+ALTER TABLE blogs_before_themes RENAME TO blogs;
+
+CREATE TABLE users_before_themes (
+    id INTEGER NOT NULL PRIMARY KEY AUTOINCREMENT,
+    username VARCHAR NOT NULL,
+    display_name VARCHAR NOT NULL DEFAULT '',
+    outbox_url VARCHAR NOT NULL UNIQUE,
+    inbox_url VARCHAR NOT NULL UNIQUE,
+    is_admin BOOLEAN NOT NULL DEFAULT 'f',
+    summary TEXT NOT NULL DEFAULT '',
+    email TEXT,
+    hashed_password TEXT,
+    instance_id INTEGER REFERENCES instances(id) ON DELETE CASCADE NOT NULL,
+    creation_date DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP,
+    ap_url TEXT NOT NULL default '' UNIQUE,
+    private_key TEXT,
+    public_key TEXT NOT NULL DEFAULT '',
+    shared_inbox_url VARCHAR,
+    followers_endpoint VARCHAR NOT NULL DEFAULT '' UNIQUE,
+    avatar_id INTEGER REFERENCES medias(id) ON DELETE CASCADE,
+    last_fetched_date TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP,
+    fqn TEXT NOT NULL DEFAULT '',
+    summary_html TEXT NOT NULL DEFAULT '',
+    FOREIGN KEY (avatar_id) REFERENCES medias(id) ON DELETE SET NULL,
+    CONSTRAINT blog_authors_unique UNIQUE (username, instance_id)
+);
+INSERT INTO users_before_themes SELECT
+	id,
+    username,
+    display_name,
+    outbox_url,
+    inbox_url,
+    is_admin,
+    summary,
+    email,
+    hashed_password,
+    instance_id,
+    creation_date,
+    ap_url,
+    private_key,
+    public_key,
+    shared_inbox_url,
+    followers_endpoint,
+    avatar_id,
+    last_fetched_date,
+    fqn,
+    summary_html
+FROM users;
+DROP TABLE users;
+ALTER TABLE users_before_themes RENAME TO users;

migrations/sqlite/2019-06-21-154916_themes/up.sql

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+-- Your SQL goes here
+ALTER TABLE blogs ADD COLUMN theme VARCHAR;
+ALTER TABLE users ADD COLUMN preferred_theme VARCHAR;
+ALTER TABLE users ADD COLUMN hide_custom_css BOOLEAN NOT NULL DEFAULT 'f';