feat: implement RSS subscriptions, downloader routing and local media checks

migrations/0001_initial.sql

@@ -0,0 +1,34 @@
+CREATE TABLE subscriptions (
+    id TEXT PRIMARY KEY,
+    spec TEXT NOT NULL,
+    deleted INTEGER NOT NULL DEFAULT 0,
+    last_checked_at INTEGER,
+    last_error TEXT
+);
+
+CREATE TABLE releases (
+    subscription_id TEXT NOT NULL REFERENCES subscriptions(id),
+    resource_key TEXT NOT NULL,
+    payload TEXT NOT NULL,
+    PRIMARY KEY (subscription_id, resource_key)
+);
+
+CREATE TABLE download_jobs (
+    id TEXT PRIMARY KEY,
+    subscription_id TEXT NOT NULL REFERENCES subscriptions(id),
+    resource_key TEXT NOT NULL,
+    title TEXT NOT NULL,
+    season INTEGER NOT NULL,
+    episode INTEGER NOT NULL,
+    download_url TEXT NOT NULL,
+    torrent_bytes BLOB,
+    info_hash TEXT,
+    state TEXT NOT NULL DEFAULT 'queued'
+        CHECK (state IN ('queued', 'submitting', 'submitted', 'downloading', 'completed', 'missing', 'failed')),
+    attempts INTEGER NOT NULL DEFAULT 0,
+    last_error TEXT,
+    next_attempt_at INTEGER NOT NULL DEFAULT 0,
+    UNIQUE(subscription_id, resource_key),
+    UNIQUE(subscription_id, season, episode)
+);
+CREATE INDEX jobs_state ON download_jobs(state, next_attempt_at);

migrations/0002_downloader_instances.sql

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+CREATE TABLE downloader_instances (
+    id TEXT PRIMARY KEY,
+    name TEXT NOT NULL,
+    kind TEXT NOT NULL CHECK (kind = 'qbittorrent'),
+    endpoint TEXT NOT NULL UNIQUE,
+    config TEXT NOT NULL
+);
+CREATE TABLE downloader_selection (
+    singleton INTEGER PRIMARY KEY CHECK (singleton = 1),
+    downloader_id TEXT REFERENCES downloader_instances(id)
+);
+INSERT INTO downloader_selection(singleton) VALUES (1);
+
+ALTER TABLE download_jobs ADD COLUMN downloader_id TEXT REFERENCES downloader_instances(id);
+ALTER TABLE download_jobs ADD COLUMN legacy_unassigned INTEGER NOT NULL DEFAULT 0;
+-- Existing jobs have no recorded owner. Do not assign them to an arbitrary new instance.
+UPDATE download_jobs SET legacy_unassigned = 1;
+CREATE INDEX jobs_downloader ON download_jobs(downloader_id, state);

migrations/0003_media_destinations.sql

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+CREATE TABLE media_destinations (
+    id TEXT PRIMARY KEY,
+    name TEXT NOT NULL,
+    kind TEXT NOT NULL CHECK (kind = 'local'),
+    root_path TEXT NOT NULL
+);
+CREATE TABLE destination_selection (
+    singleton INTEGER PRIMARY KEY CHECK (singleton = 1),
+    destination_id TEXT REFERENCES media_destinations(id)
+);
+INSERT INTO destination_selection(singleton) VALUES (1);
+CREATE TABLE destination_mappings (
+    id TEXT PRIMARY KEY,
+    destination_id TEXT NOT NULL REFERENCES media_destinations(id),
+    downloader_id TEXT NOT NULL REFERENCES downloader_instances(id),
+    version INTEGER NOT NULL,
+    download_root TEXT NOT NULL,
+    UNIQUE(destination_id, downloader_id, version)
+);
+ALTER TABLE download_jobs ADD COLUMN destination_id TEXT REFERENCES media_destinations(id);
+ALTER TABLE download_jobs ADD COLUMN mapping_id TEXT REFERENCES destination_mappings(id);
+ALTER TABLE download_jobs ADD COLUMN download_save_path TEXT;
+ALTER TABLE download_jobs ADD COLUMN file_status TEXT NOT NULL DEFAULT 'unchecked'
+    CHECK (file_status IN ('unchecked', 'present', 'absent', 'unavailable'));
+ALTER TABLE download_jobs ADD COLUMN file_checked_at INTEGER;
+ALTER TABLE download_jobs ADD COLUMN file_last_success_at INTEGER;
+ALTER TABLE download_jobs ADD COLUMN file_error TEXT;
+CREATE TABLE media_files (
+    job_id TEXT NOT NULL REFERENCES download_jobs(id),
+    relative_path TEXT NOT NULL,
+    expected_size INTEGER NOT NULL,
+    observed_size INTEGER,
+    status TEXT NOT NULL DEFAULT 'unchecked'
+        CHECK (status IN ('unchecked', 'present', 'absent', 'unavailable')),
+    error TEXT,
+    PRIMARY KEY(job_id, relative_path)
+);