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priority_helper.php
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Created
Sun, Jun 29, 9:54 PM
Size
5 KB
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text/x-php
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Tue, Jul 1, 9:54 PM (21 h, 59 s)
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rINP In-Portal
priority_helper.php
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<?php
/**
* @version $Id: priority_helper.php 12306 2009-08-17 02:35:55Z dmitrya $
* @package In-Portal
* @copyright Copyright (C) 1997 - 2009 Intechnic. All rights reserved.
* @license GNU/GPL
* In-Portal is Open Source software.
* This means that this software may have been modified pursuant
* the GNU General Public License, and as distributed it includes
* or is derivative of works licensed under the GNU General Public License
* or other free or open source software licenses.
* See http://www.in-portal.net/license/ for copyright notices and details.
*/
defined
(
'FULL_PATH'
)
or
die
(
'restricted access!'
);
class
kPriorityHelper
extends
kHelper
{
/**
* Prepares options for priority dropdown
*
* @param kEvent $event
* @param bool $is_new for newly created items add new priority to the end
* @param string $constrain constrain for priority selection (if any)
*
*/
function
preparePriorities
(&
$event
,
$is_new
=
false
,
$constrain
=
''
)
{
$object
=&
$event
->
getObject
();
$field_options
=
$object
->
GetFieldOptions
(
'Priority'
);
$table_name
=
$this
->
Application
->
getUnitOption
(
$event
->
Prefix
,
'TableName'
);
$sql
=
'SELECT COUNT(*)
FROM '
.
$table_name
;
if
(
$constrain
)
{
$sql
.=
' WHERE '
.
$constrain
;
}
if
(!
isset
(
$object
->
Fields
[
'OldPriority'
]))
{
$object
->
VirtualFields
[
'OldPriority'
]
=
Array
(
'type'
=>
'int'
,
'default'
=>
0
);
}
$items_count
=
$this
->
Conn
->
GetOne
(
$sql
);
// instanceof is not used, because PHP4 doesn't support it
$current_priority
=
is_a
(
$object
,
'kDBList'
)
?
0
:
$object
->
GetDBField
(
'Priority'
);
if
(
$is_new
||
$current_priority
==
-(
$items_count
+
1
))
{
$items_count
++;
}
if
(
$is_new
)
{
// add new item to the end of list
$object
->
SetDBField
(
'Priority'
,
-
$items_count
);
$object
->
SetDBField
(
'OldPriority'
,
-
$items_count
);
}
else
{
$object
->
SetDBField
(
'OldPriority'
,
$current_priority
);
}
for
(
$i
=
1
;
$i
<=
$items_count
;
$i
++)
{
$field_options
[
'options'
][-
$i
]
=
$i
;
}
$object
->
SetFieldOptions
(
'Priority'
,
$field_options
);
// storing prioriry right after load for comparing when updating
}
/**
* Updates priorities for changed items
*
* @param kEvent $event
* @param Array $changes = Array (ID => Array ('parent' => ..., 'new' => ..., 'old' => ...), ...)
* @param Array $new_ids = Array (temp_id => live_id)
* @param string $constrain
*/
function
updatePriorities
(&
$event
,
$changes
,
$new_ids
,
$constrain
=
''
)
{
if
(!
$changes
)
{
// no changes to process
return
Array
();
}
list
(
$id
,
$pair
)
=
each
(
$changes
);
if
(!
$id
&&
!
array_key_exists
(
'parent'
,
$pair
))
{
// adding new item without constrain -> priority stays the same
return
Array
(
$id
);
}
$id_field
=
$this
->
Application
->
getUnitOption
(
$event
->
Prefix
,
'IDField'
);
$table_name
=
$this
->
Application
->
getUnitOption
(
$event
->
Prefix
,
'TableName'
);
$ids
=
array
();
$not_processed
=
array_keys
(
$changes
);
foreach
(
$changes
as
$id
=>
$pair
)
{
array_push
(
$ids
,
$id
);
$constrain
=
isset
(
$pair
[
'parent'
])
?
'ParentId = '
.
$pair
[
'parent'
].
' AND '
:
''
;
if
(
$pair
[
'old'
]
==
'new'
)
{
// replace 0 with newly created item id (from $new_ids mapping)
$not_processed
[
array_search
(
$id
,
$not_processed
)
]
=
$new_ids
[
$id
];
$id
=
$new_ids
[
$id
];
$sql
=
'SELECT MIN(Priority)
FROM '
.
$table_name
.
'
WHERE '
.
$constrain
.
' '
.
$id_field
.
' NOT IN ('
.
implode
(
','
,
$not_processed
).
')'
;
$min_priority
=
(
int
)
$this
->
Conn
->
GetOne
(
$sql
)
-
1
;
if
(
$pair
[
'new'
]
<
$min_priority
)
{
$pair
[
'new'
]
=
$min_priority
;
}
$pair
[
'old'
]
=
$min_priority
;
}
if
(
$pair
[
'new'
]
<
$pair
[
'old'
])
{
$set
=
' SET Priority = Priority + 1'
;
$where
=
' WHERE '
.
$constrain
.
'
Priority >= '
.
$pair
[
'new'
].
'
AND
Priority < '
.
$pair
[
'old'
].
'
AND
'
.
$id_field
.
' NOT IN ('
.
implode
(
','
,
$not_processed
).
')'
;
}
elseif
(
$pair
[
'new'
]
>
$pair
[
'old'
])
{
$set
=
' SET Priority = Priority - 1'
;
$where
=
' WHERE '
.
$constrain
.
'
Priority > '
.
$pair
[
'old'
].
'
AND
Priority <= '
.
$pair
[
'new'
].
'
AND
'
.
$id_field
.
' NOT IN ('
.
implode
(
','
,
$not_processed
).
')'
;
}
else
{
$set
=
'SET Priority = '
.
$pair
[
'new'
];
$where
=
' WHERE '
.
$id_field
.
' = '
.
$id
;
}
$ids
=
array_merge
(
$ids
,
$this
->
Conn
->
GetCol
(
'SELECT '
.
$id_field
.
' FROM '
.
$table_name
.
$where
));
$q
=
'UPDATE '
.
$table_name
.
' '
.
$set
.
$where
;
$this
->
Conn
->
Query
(
$q
);
unset
(
$not_processed
[
array_search
(
$id
,
$not_processed
)]
);
}
return
$ids
;
}
/**
* Recalculates priorities
*
* @param kEvent $event
* @param string $constrain
*/
function
recalculatePriorities
(&
$event
,
$constrain
=
''
)
{
$id_field
=
$this
->
Application
->
getUnitOption
(
$event
->
Prefix
,
'IDField'
);
$table_name
=
$this
->
Application
->
getUnitOption
(
$event
->
Prefix
,
'TableName'
);
$sql
=
'SELECT '
.
$id_field
.
'
FROM '
.
$table_name
.
(
$constrain
?
' WHERE '
.
$constrain
:
''
).
'
ORDER BY Priority DESC'
;
$items
=
$this
->
Conn
->
GetCol
(
$sql
);
foreach
(
$items
as
$item_number
=>
$item_id
)
{
$sql
=
'UPDATE '
.
$table_name
.
'
SET Priority = '
.-(
$item_number
+
1
).
'
WHERE '
.
$id_field
.
' = '
.
$item_id
;
$this
->
Conn
->
Query
(
$sql
);
}
return
$items
;
}
}
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