-- ATTACH DATABASE 'comments.db' AS Comments;

PRAGMA FOREIGN_KEYS = ON;


DROP TABLE IF EXISTS CHANNEL;
CREATE TABLE IF NOT EXISTS CHANNEL(
    ClaimId     TEXT    NOT NULL,
    Name        TEXT    NOT NULL,
    Timestamp   INTEGER      DEFAULT NULL,
    CONSTRAINT CHANNEL_PK PRIMARY KEY (ClaimId)
        ON CONFLICT IGNORE,
    CONSTRAINT CHANNEL_NAME_LEN
        CHECK ( 0 < length(Name) AND length(Name) <= 120)
);





DROP TABLE IF EXISTS COMMENT;
CREATE TABLE IF NOT EXISTS COMMENT (
    CommentId   INTEGER NOT NULL,
    LbryClaimId TEXT    NOT NULL,
    ChannelId   TEXT    NOT NULL,
    Body        TEXT    NOT NULL,
    ParentId    INTEGER          DEFAULT NULL,
    Timestamp   DATETIME,
    CONSTRAINT COMMENT_ID_PK PRIMARY KEY (CommentId)
        ON CONFLICT ABORT,
    CONSTRAINT COMMENT_PARENT_FK FOREIGN KEY (ParentId) REFERENCES COMMENT(CommentId)
        ON UPDATE CASCADE ON DELETE NO ACTION,  -- setting null implies comment is top level
    CONSTRAINT COMMENT_BODY_LEN CHECK(1 < length(Body) AND length(Body) <= 2000)
);