2 /*=====================================================================*\
3 || ###################################################################
4 || # Iris Studios Shared Object Framework [#]issoversion[#]
5 || # Copyright ©2002-[#]year[#] Iris Studios, Inc.
7 || # This program is free software; you can redistribute it and/or modify
8 || # it under the terms of the GNU General Public License as published by
9 || # the Free Software Foundation; version [#]gpl[#] of the License.
11 || # This program is distributed in the hope that it will be useful, but
12 || # WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
13 || # or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
16 || # You should have received a copy of the GNU General Public License along
17 || # with this program; if not, write to the Free Software Foundation, Inc.,
18 || # 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
19 || ###################################################################
20 \*=====================================================================*/
23 * Abstract Datamanger API
29 if (!defined('REQ_AUTO'))
32 * Auto-increasing value
34 define('REQ_AUTO', -1);
37 * Set by a cusotm set_*() function
42 * Index for cleaning type
47 * Index for requirement type
52 * Index for verification type
54 define('F_VERIFY', 2);
59 define('F_RELATION', 3);
62 * Relation index for file name, relative to ISSO->apppath
64 define('F_RELATION_FILE', 0);
67 * Relation index for class name
69 define('F_RELATION_CLASS', 1);
72 * Relation index for field-link alternate name
74 define('F_RELATION_ALTFIELD', 2);
80 * Abstract class that is used as an API base for most common database interaction
81 * schemes. Creates a simple structure that holds data and can update, delete, and
84 * @author Iris Studios, Inc.
85 * @copyright Copyright ©2002 - [#]year[#], Iris Studios, Inc.
100 * Fields: used for verification and sanitization
101 * NAME => array(TYPE, REQUIRED, VERIFY METHOD (:self for self-named method), RELATION => array(FILE, CLASS IN FILE, ALTERNATE FIELD NAME))
105 var $fields = array();
108 * Values array: sanitized and verified field values
112 var $values = array();
115 * Fields that were manually set with set(), not by using set_existing()
119 var $setfields = array();
122 * An array of all of the processed relations on an object
126 var $relations = array();
136 * The object table row; a fetched row that represents this instance
140 var $objdata = array();
143 * Insert ID from the insert() command
150 * Pre- and post-action method stoppers
154 var $norunners = array();
157 * The relations to execute on
161 var $dorelations = array('fetch');
164 * Error list that has been generated
168 var $errors = array();
170 // ###################################################################
172 * Constructor: cannot instantiate class directly
174 function __construct(&$registry)
176 if (!is_subclass_of($this, 'API'))
178 trigger_error('Cannot instantiate the API module directly', E_USER_ERROR
);
181 if (!is_object($registry))
183 trigger_error('The passed registry is not an object', E_USER_ERROR
);
186 $this->registry
=& $registry;
189 // ###################################################################
191 * (PHP 4) Constructor
193 function API(&$registry)
195 $this->__construct($registry);
198 // ###################################################################
200 * Constructs an error for the error handler to receive
204 * @param string Error message
206 function error($message)
208 $this->errors
[] = $message;
210 // we want to explicitly specify silence
211 if (APIError() == 'silent')
216 if (!is_callable(APIError()))
218 trigger_error('No APIError() handler has been set', E_USER_WARNING
);
221 call_user_func(APIError(), $message);
224 // ###################################################################
226 * Returns the error list. This is because we don't want people mucking
227 * with the error system. It will return an empty array if there are
232 * @return array Array of errors
234 function check_errors()
236 if (sizeof($this->errors
) < 1)
241 return $this->errors
;
244 // ###################################################################
246 * Sets a value, sanitizes it, and verifies it
250 * @param string Field name
252 * @param bool Do clean?
253 * @param bool Do verify?
255 function set($field, $value, $doclean = true
, $doverify = true
)
257 if (!isset($this->fields
["$field"]))
259 trigger_error('Field `' . $field . '` is not valid', E_USER_WARNING
);
263 $this->values
["$field"] = ($doclean ?
$this->registry
->clean($value, $this->fields
["$field"][F_TYPE
]) : $value);
265 $this->setfields
["$field"] = $field;
267 if (isset($this->fields
["$field"][F_VERIFY
]) AND $doverify)
269 if ($this->fields
["$field"][F_VERIFY
] == ':self')
271 $verify = $this->{"verify_$field"}($field);
275 $verify = $this->{$this->fields
["$field"][F_VERIFY
]}($field);
278 if ($verify !== true
)
280 if ($verify === false
)
282 $this->error(sprintf($this->registry
->modules
['localize']->string('Validation of %1$s failed'), $field));
286 $this->error($verify);
292 // ###################################################################
294 * Sets the condition to use in the WHERE clause; if not passed, then
295 * it calculates it from the REQ_AUTO field
299 * @param string WHERE conditional bit
301 function set_condition($condition = '')
303 if ($condition != '')
305 $this->condition
= $condition;
309 foreach ($this->fields
AS $name => $options)
311 if ($options[F_REQ
] == REQ_AUTO
)
313 if (!$this->values
["$name"])
315 trigger_error('Cannot determine condition from the REQ_AUTO field because it is not set', E_USER_WARNING
);
319 $this->condition
= "$name = " . $this->prepare_field_for_sql($name);
323 if ($this->condition
== '')
325 trigger_error('No REQ_AUTO fields are present and therefore the condition cannot be created', E_USER_WARNING
);
330 // ###################################################################
332 * Sets existing data into $values where it's not already present
336 function set_existing()
346 foreach ($this->objdata
AS $field => $value)
348 if (!isset($this->values
["$field"]))
350 $this->values
["$field"] = $value;
357 // ###################################################################
359 * Fetches a record based on the condition
365 if ($this->condition
== '')
367 trigger_error('Condition is empty: cannot fetch', E_USER_ERROR
);
370 $this->run_action_method('pre_fetch');
372 $result = $this->registry
->modules
[ISSO_DB_LAYER
]->query_first("SELECT * FROM {$this->prefix}{$this->table} WHERE {$this->condition}");
375 $this->error($this->registry
->modules
['localize']->string('No records were returned'));
379 $this->run_action_method('post_fetch');
381 $this->objdata
= $result;
383 foreach ($this->objdata
AS $key => $value)
385 if (!isset($this->values
["$key"]))
387 $this->values
["$key"] = $value;
391 $this->call_relations('fetch');
394 // ###################################################################
396 * Inserts a record in the database
404 $this->run_action_method('pre_insert');
406 foreach ($this->setfields
AS $field)
409 $values[] = $this->prepare_field_for_sql($field);
412 $this->registry
->modules
[ISSO_DB_LAYER
]->query("INSERT INTO {$this->prefix}{$this->table} (" . implode(',', $fields) . ") VALUES (" . implode(',', $values) . ")");
414 if (strcasecmp(ISSO_DB_LAYER
, 'DB_PostgreSQL') == 0)
416 foreach ($this->fields
AS $field => $info)
418 if ($info[F_REQ
] == REQ_AUTO
)
425 $this->insertid
= $this->registry
->modules
[ISSO_DB_LAYER
]->insert_id($this->prefix
. $this->table
, $autofield);
429 $this->insertid
= $this->registry
->modules
[ISSO_DB_LAYER
]->insert_id();
432 $this->run_action_method('post_insert');
435 // ###################################################################
437 * Updates a record in the database using the data in $vaues
443 if ($this->condition
== '')
445 trigger_error('Condition is empty: cannot fetch', E_USER_ERROR
);
448 $this->run_action_method('pre_update');
450 foreach ($this->setfields
AS $field)
452 $updates[] = "$field = " . $this->prepare_field_for_sql($field);
454 $updates = implode(', ', $updates);
456 $this->registry
->modules
[ISSO_DB_LAYER
]->query("UPDATE {$this->prefix}{$this->table} SET $updates WHERE {$this->condition}");
458 $this->run_action_method('post_update');
461 // ###################################################################
469 if ($this->condition
== '')
471 trigger_error('Condition is empty: cannot fetch', E_USER_ERROR
);
474 $this->set_existing();
476 $this->run_action_method('pre_delete');
478 $this->registry
->modules
[ISSO_DB_LAYER
]->query("DELETE FROM {$this->prefix}{$this->table} WHERE {$this->condition}");
480 $this->run_action_method('post_delete');
483 // ###################################################################
485 * Verifies that all required fields are set
491 foreach ($this->fields
AS $name => $options)
493 if ($options[F_REQ
] == REQ_YES
)
495 if (!isset($this->values
["$name"]))
497 $this->error(sprintf($this->registry
->modules
['localize']->string('Required field %1$s was not set'), $name));
500 else if ($options[F_REQ
] == REQ_SET
)
502 $this->{"set_$name"}();
507 // ###################################################################
509 * Runs a pre- or post-action method for database commands
513 * @param string Action to run
515 function run_action_method($method)
517 if (in_array($method, $this->norunners
))
522 $actmethod = (method_exists($this, $method) ?
$this->$method() : '');
525 // ###################################################################
527 * Determines if it's safe to run a relation; if so, it will return
528 * the WHERE SQL clause
532 * @param string Operation to run
534 function call_relations($method)
536 if (!in_array($method, $this->dorelations
))
541 foreach ($this->fields
AS $field => $info)
543 $value = (isset($this->values
["$field"]) ?
$this->values
["$field"] : $this->objdata
["$field"]);
544 if ($value == null
OR !is_array($info[F_RELATION
]))
549 if (!file_exists($this->registry
->get('apppath') . $info[F_RELATION
][F_RELATION_FILE
]))
551 trigger_error("Could not load the relation file for field '$field'");
554 require_once($this->registry
->get('apppath') . $info[F_RELATION
][F_RELATION_FILE
]);
556 $this->relations
["$field"] = new $info[F_RELATION
][F_RELATION_CLASS
]($this->registry
);
557 $this->relations
["$field"]->set(($info[F_RELATION
][F_RELATION_ALTFIELD
] ?
$info[F_RELATION
][F_RELATION_ALTFIELD
] : $field), $value);
558 $this->relations
["$field"]->set_condition();
559 $this->relations
["$field"]->$method();
563 // ###################################################################
565 * Prepares a value for use in a SQL query; it encases and escapes
566 * strings and string-like values
570 * @param string Field name
572 * @return string Prepared value entry
574 function prepare_field_for_sql($name)
576 $type = $this->fields
["$name"][F_TYPE
];
578 if ($type == TYPE_NOCLEAN
OR $type == TYPE_STR
OR $type == TYPE_STRUN
)
580 return "'" . $this->registry
->escape($this->values
["$name"]) . "'";
582 else if ($type == TYPE_BOOL
)
584 return ($this->values
["$name"] == true ?
"'1'" : "'0'");
588 return $this->values
["$name"];
592 // ###################################################################
594 * Verify field: not a zero value
598 function verify_nozero($field)
600 if ($this->values
["$field"] == 0)
602 return sprintf($this->registry
->modules
['localize']->string('The field %1$s cannot be zero'), $field);
608 // ###################################################################
610 * Verify field: not empty
614 function verify_noempty($field)
616 if (empty($this->values
["$field"]))
618 return sprintf($this->registry
->modules
['localize']->string('The field %1$s cannot be empty'), $field);
625 // ###################################################################
627 * Setter and getter method for the API error reporting system. Passing
628 * a name will cause the set, no arguments will cause the get.
632 * @param mixed Method name in callable form
634 * @return mixed Method name in callable form
636 function APIError($new = null
)
638 static $caller, $prev;
644 else if ($new !== null
)
653 /*=====================================================================*\
654 || ###################################################################
657 || ###################################################################
658 \*=====================================================================*/