-- Import with verification (M502 #5522): a finished download is checked
-- against the album it was grabbed for before anything reaches the library.
--
--   grabs (columns)        how far the download has got, and what the import
--                          made of it: the verdict, its reason and evidence,
--                          where the files went.
--   grabs.end_reason       a grab also ends by being imported, refused, or
--                          found to be an album already held.
--   release_blocks.reason  import: the files were not the album.
--   acquisition_settings   which library folder new music is filed into
--                          ('' = the first scan path).
ALTER TABLE grabs
    ADD COLUMN progress          real NOT NULL DEFAULT 0,
    ADD COLUMN import_state      text NOT NULL DEFAULT ''
        CONSTRAINT grabs_import_state_check CHECK (import_state IN
            ('', 'downloading', 'waiting', 'importing', 'imported', 'refused', 'review', 'held', 'failed')),
    ADD COLUMN import_reason     text NOT NULL DEFAULT '',
    ADD COLUMN import_detail     jsonb NOT NULL DEFAULT '{}',
    -- A person said "import anyway" to a download the check held for them.
    ADD COLUMN import_forced     boolean NOT NULL DEFAULT false,
    ADD COLUMN import_attempts   integer NOT NULL DEFAULT 0,
    ADD COLUMN import_updated_at timestamptz,
    ADD COLUMN imported_at       timestamptz,
    ADD COLUMN imported_files    integer NOT NULL DEFAULT 0,
    ADD COLUMN destination       text NOT NULL DEFAULT '';

ALTER TABLE grabs DROP CONSTRAINT grabs_end_reason_check;
ALTER TABLE grabs ADD CONSTRAINT grabs_end_reason_check
    CHECK (end_reason IN ('', 'superseded', 'imported', 'refused', 'held'));

CREATE INDEX grabs_live_idx ON grabs (grabbed_at) WHERE ended_at IS NULL;

ALTER TABLE release_blocks DROP CONSTRAINT release_blocks_reason_check;
ALTER TABLE release_blocks ADD CONSTRAINT release_blocks_reason_check
    CHECK (reason IN ('operator', 'files', 'import'));

ALTER TABLE acquisition_settings ADD COLUMN import_root text NOT NULL DEFAULT '';