SET client_encoding = 'UTF8';

SET client_min_messages = warning;

ALTER SEQUENCE domains_gid RENAME TO domain_gid;

CREATE TABLE domain_data (

    gid         bigint NOT NULL DEFAULT nextval('domain_gid'),

    tid         bigint NOT NULL DEFAULT 1,

    domaindir   varchar(40) NOT NULL,

    CONSTRAINT  pkey_domain_data PRIMARY KEY (gid),

    CONSTRAINT  fkey_domain_data_tid_transport FOREIGN KEY (tid)

        REFERENCES transport (tid)

);

CREATE TABLE domain_name (

    domainname  varchar(255) NOT NULL,

    gid         bigint NOT NULL,

    is_primary  boolean NOT NULL,

    CONSTRAINT  pkey_domain_name PRIMARY KEY (domainname),

    CONSTRAINT  fkey_domain_name_gid_domain_data FOREIGN KEY (gid)

        REFERENCES domain_data (gid)

);

INSERT INTO domain_data (gid, tid, domaindir) 

    SELECT gid, tid, domaindir

      FROM domains;

INSERT INTO domain_name (domainname, gid, is_primary) 

    SELECT domainname, gid, TRUE

      FROM domains;

ALTER TABLE users DROP CONSTRAINT pkye_users;

ALTER TABLE users ADD CONSTRAINT  pkey_users PRIMARY KEY (local_part, gid);

ALTER TABLE users DROP CONSTRAINT fkey_users_gid_domains;

ALTER TABLE users ADD CONSTRAINT fkey_users_gid_domain_data FOREIGN KEY (gid)

    REFERENCES domain_data (gid);

ALTER TABLE alias DROP CONSTRAINT fkey_alias_gid_domains;

ALTER TABLE alias DROP CONSTRAINT pkey_alias;

ALTER TABLE alias ADD CONSTRAINT fkey_alias_gid_domain_data FOREIGN KEY (gid)

    REFERENCES domain_data (gid);

ALTER TABLE relocated DROP CONSTRAINT fkey_relocated_gid_domains;

ALTER TABLE relocated ADD CONSTRAINT fkey_relocated_gid_domain_data

    FOREIGN KEY (gid) REFERENCES domain_data (gid);

CREATE OR REPLACE VIEW dovecot_password AS

    SELECT local_part || '@' || domain_name.domainname AS "user",

           passwd AS "password", smtp, pop3, imap, managesieve

      FROM users

           LEFT JOIN domain_name USING (gid);

CREATE OR REPLACE VIEW dovecot_user AS

    SELECT local_part || '@' || domain_name.domainname AS userid,

           uid, gid, domain_data.domaindir || '/' || uid AS home,

           '~/' || maillocation.maillocation AS mail

      FROM users

           LEFT JOIN domain_data USING (gid)

           LEFT JOIN domain_name USING (gid)

           LEFT JOIN maillocation USING (mid);

CREATE OR REPLACE VIEW postfix_gid AS

    SELECT gid, domainname

      FROM domain_name;

CREATE OR REPLACE VIEW postfix_uid AS

    SELECT local_part || '@' || domain_name.domainname AS address, uid

      FROM users

           LEFT JOIN domain_name USING (gid);

CREATE OR REPLACE VIEW postfix_maildir AS

    SELECT local_part || '@' || domain_name.domainname AS address,

           domain_data.domaindir||'/'||uid||'/'||maillocation.maillocation||'/'

           AS maildir

      FROM users

           LEFT JOIN domain_data USING (gid)

           LEFT JOIN domain_name USING (gid)

           LEFT JOIN maillocation USING (mid);

CREATE OR REPLACE VIEW postfix_relocated AS

    SELECT address || '@' || domain_name.domainname AS address, destination

      FROM relocated

           LEFT JOIN domain_name USING (gid);

DROP VIEW postfix_alias;

DROP VIEW vmm_domain_info;

DROP VIEW vmm_alias_count;

ALTER TABLE alias ALTER address TYPE varchar(64);

ALTER TABLE alias ADD CONSTRAINT pkey_alias 

    PRIMARY KEY (gid, address, destination);

CREATE OR REPLACE VIEW postfix_alias AS

    SELECT address || '@' || domain_name.domainname AS address, destination, gid

      FROM alias

           LEFT JOIN domain_name USING (gid);

CREATE OR REPLACE VIEW postfix_transport AS

    SELECT local_part || '@' || domain_name.domainname AS address,

           transport.transport

      FROM users

           LEFT JOIN transport USING (tid)

           LEFT JOIN domain_name USING (gid);

CREATE OR REPLACE VIEW vmm_domain_info AS

    SELECT gid, domainname, transport, domaindir,

           count(uid) AS accounts,

           (SELECT count(DISTINCT address)

              FROM alias

             WHERE alias.gid = domain_data.gid) AS aliases,

           (SELECT count(gid)

              FROM relocated

             WHERE relocated.gid = domain_data.gid) AS relocated,

           (SELECT count(gid)

              FROM domain_name

             WHERE domain_name.gid = domain_data.gid

               AND NOT domain_name.is_primary) AS aliasdomains

      FROM domain_data

           LEFT JOIN domain_name USING (gid)

           LEFT JOIN transport USING (tid)

           LEFT JOIN users USING (gid)

     WHERE domain_name.is_primary

  GROUP BY gid, domainname, transport, domaindir;

DROP TABLE domains;

CREATE LANGUAGE plpgsql;

CREATE OR REPLACE FUNCTION domain_primary_trigger() RETURNS TRIGGER AS $$

DECLARE

    primary_count bigint;

BEGIN

    SELECT INTO primary_count count(gid) + NEW.is_primary::integer

      FROM domain_name

     WHERE domain_name.gid = NEW.gid

       AND is_primary;

    IF (primary_count > 1) THEN

        RAISE EXCEPTION 'There can only be one domain marked as primary.';

    END IF;

    RETURN NEW;

END;

$$ LANGUAGE plpgsql STABLE;

DROP TRIGGER IF EXISTS primary_count ON domain_name;

CREATE TRIGGER primary_count_ins BEFORE INSERT ON domain_name

    FOR EACH ROW EXECUTE PROCEDURE domain_primary_trigger();

CREATE TRIGGER primary_count_upd AFTER UPDATE ON domain_name

    FOR EACH ROW EXECUTE PROCEDURE domain_primary_trigger();