--
-- Title:      Update for permissions schema changes
-- Database:   SQL Server
-- Since:      V2.2 Schema 85
-- Author:     Andy Hind
--
-- Please contact support@alfresco.com if you need assistance with the upgrade.
--

CREATE TABLE alf_acl_change_set (
   id numeric(19,0) identity not null,
   version numeric(19,0) NOT NULL,
   primary key (id)
);

-- Add to ACL
ALTER TABLE alf_access_control_list ADD
   type INT NOT NULL DEFAULT 0,
   latest tinyint NOT NULL DEFAULT 1,
   acl_id nvarchar(36) NOT NULL DEFAULT 'UNSET',
   acl_version numeric(19,0) NOT NULL DEFAULT 1,
   inherited_acl numeric(19,0) null,
   is_versioned tinyint NOT NULL DEFAULT 0,
   requires_version tinyint NOT NULL DEFAULT 0,
   acl_change_set numeric(19,0) null,
   inherits_from numeric(19,0) null,
   CONSTRAINT fk_alf_acl_acs FOREIGN KEY (acl_change_set) REFERENCES alf_acl_change_set (id);
CREATE INDEX fk_alf_acl_acs ON alf_access_control_list (acl_change_set);
CREATE INDEX idx_alf_acl_inh ON alf_access_control_list (inherits, inherits_from);

UPDATE alf_access_control_list
   set acl_id = id;

ALTER TABLE alf_access_control_list
   ADD UNIQUE (acl_id, latest, acl_version);

-- restructure authority
CREATE TABLE t_alf_authority (
   id numeric(19,0) identity not null,
   version numeric(19,0) not null,
   authority nvarchar(100) null,
   crc numeric(19,0) null,
   primary key (id),
   UNIQUE (authority, crc)
);
CREATE INDEX idx_alf_auth_aut ON t_alf_authority (authority);
INSERT INTO t_alf_authority (version, authority)
   SELECT version, recipient FROM alf_authority;

-- Create ACE context
CREATE TABLE alf_ace_context (
   id numeric(19,0) identity not null,
   version numeric(19,0) NOT NULL,
   class_context nvarchar(1024) null,
   property_context nvarchar(1024) null,
   kvp_context nvarchar(1024) null,
   primary key (id)
 );

-- Extend ACE
create table t_alf_access_control_entry
(
   id numeric(19,0) identity not null,
   version numeric(19,0) not null,
   acl_id numeric(19,0) not null,
   permission_id numeric(19,0) not null,
   allowed tinyint not null, 
   authority_id numeric(19,0) NOT NULL DEFAULT -1,
   applies INT NOT NULL DEFAULT 0,
   context_id numeric(19,0) null
   primary key (id)
   CONSTRAINT fk_alf_ace_auth FOREIGN KEY (authority_id) REFERENCES t_alf_authority (id),
   CONSTRAINT fk_alf_ace_perm FOREIGN KEY (permission_id) REFERENCES alf_permission (id),
   CONSTRAINT fk_alf_ace_ctx FOREIGN KEY (context_id) REFERENCES alf_ace_context (id)
);
CREATE INDEX fk_alf_ace_auth ON t_alf_access_control_entry (authority_id);
CREATE INDEX fk_alf_ace_perm ON t_alf_access_control_entry (permission_id);
CREATE INDEX fk_alf_ace_ctx ON t_alf_access_control_entry (context_id);
   
-- Create ACL member list
CREATE TABLE alf_acl_member (
   id numeric(19,0) identity not null,
   version numeric(19,0) NOT NULL,
   acl_id numeric(19,0) NOT NULL,
   ace_id numeric(19,0) NOT NULL,
   pos INT NOT NULL,
   CONSTRAINT fk_alf_aclm_acl FOREIGN KEY (acl_id) REFERENCES alf_access_control_list (id),
   CONSTRAINT fk_alf_aclm_ace FOREIGN KEY (ace_id) REFERENCES t_alf_access_control_entry (id),
   primary key (id),
   UNIQUE(acl_id, ace_id, pos)
);
CREATE INDEX fk_alf_aclm_acl ON alf_acl_member (acl_id);
CREATE INDEX fk_alf_aclm_ace ON alf_acl_member (ace_id);

-- remove unused
DROP TABLE alf_auth_ext_keys;

-- migrate data - fix up FK refs to authority
INSERT INTO t_alf_access_control_entry (version, acl_id, permission_id, allowed, authority_id)
SELECT ace.version, ace.acl_id, ace.permission_id, ace.allowed, a.id
FROM alf_access_control_entry ace, t_alf_authority a
WHERE a.authority = ace.authority_id; 

-- migrate data - build equivalent ACL entries
INSERT INTO alf_acl_member (version, acl_id, ace_id, pos)
   select 1, ace.acl_id, ace.id, 0 from t_alf_access_control_entry ace join alf_access_control_list acl on acl.id = ace.acl_id;

-- Create auth aliases table
CREATE TABLE alf_authority_alias (
   id numeric(19,0) identity not null,
   version numeric(19,0) NOT NULL,
   auth_id numeric(19,0) NOT NULL,
   alias_id numeric(19,0) NOT NULL,
   CONSTRAINT fk_alf_autha_ali FOREIGN KEY (alias_id) REFERENCES t_alf_authority (id),
   CONSTRAINT fk_alf_autha_aut FOREIGN KEY (auth_id) REFERENCES t_alf_authority (id),
   primary key (id),
   UNIQUE (auth_id, alias_id)
) ;
CREATE INDEX fk_alf_autha_ali ON alf_authority_alias (alias_id);
CREATE INDEX fk_alf_autha_aut ON alf_authority_alias (auth_id);

-- Tidy up unused cols on ace table
ALTER TABLE t_alf_access_control_entry DROP 
   COLUMN acl_id;

DROP TABLE alf_access_control_entry;
EXEC sp_rename 't_alf_access_control_entry', 'alf_access_control_entry';

DROP TABLE alf_authority;
EXEC sp_rename 't_alf_authority', 'alf_authority';

CREATE TABLE alf_tmp_min_ace (
  min numeric(19,0) NOT NULL,
  permission_id numeric(19,0) NOT NULL,
  authority_id numeric(19,0) NOT NULL,
  allowed tinyint NOT NULL,
  applies INT NOT NULL,
  UNIQUE (permission_id, authority_id, allowed, applies)
);

INSERT INTO alf_tmp_min_ace (min, permission_id, authority_id, allowed, applies)
    SELECT
       min(ace1.id),
       ace1.permission_id,
       ace1.authority_id,
       ace1.allowed,
       ace1.applies
    FROM
       alf_access_control_entry ace1
    GROUP BY
       ace1.permission_id, ace1.authority_id, ace1.allowed, ace1.applies
;
   
-- Update members to point to the first use of an access control entry
UPDATE alf_acl_member
   SET ace_id = (SELECT help.min FROM alf_access_control_entry ace 
                     JOIN alf_tmp_min_ace help
                     ON		help.permission_id = ace.permission_id AND
                                help.authority_id = ace.authority_id AND 
                                help.allowed = ace.allowed AND 
                                help.applies = ace.applies 
                     WHERE ace.id = alf_acl_member.ace_id  );

DROP TABLE alf_tmp_min_ace;

-- Remove duplicate aces the mysql way (as you can not use the deleted table in the where clause ...)
CREATE TABLE tmp_to_delete (
   id numeric(19,0),
   PRIMARY KEY (id)
);
INSERT INTO tmp_to_delete
   SELECT ace.id FROM alf_acl_member mem RIGHT OUTER JOIN alf_access_control_entry ace ON mem.ace_id = ace.id WHERE mem.ace_id IS NULL
;
DELETE FROM alf_access_control_entry WHERE id IN (SELECT id FROM tmp_to_delete);
DROP TABLE tmp_to_delete;

-- Add constraint for duplicate acls

ALTER TABLE alf_access_control_entry
   ADD UNIQUE (permission_id, authority_id, allowed, applies, context_id);

--
-- Record script finish
--
DELETE FROM alf_applied_patch WHERE id = 'patch.db-V2.2-ACL';
INSERT INTO alf_applied_patch
  (id, description, fixes_from_schema, fixes_to_schema, applied_to_schema, target_schema, applied_on_date, applied_to_server, was_executed, succeeded, report)
  VALUES
  (
    'patch.db-V2.2-ACL', 'Manually executed script upgrade V2.2: Update acl schema',
    0, 119, -1, 120, null, 'UNKOWN', 1, 1, 'Script completed'
  );