ilInternalLink Class Reference

Class ilInternalLink. More...

Collaboration diagram for ilInternalLink:

Public Member Functions
	_deleteAllLinksOfSource ($a_source_type, $a_source_id, $a_lang="-")
	Delete all links of a given source. More...
	_deleteAllLinksToTarget ($a_target_type, $a_target_id, $a_target_inst=0)
	Delete all links to a given target. More...
	_saveLink ($a_source_type, $a_source_id, $a_target_type, $a_target_id, $a_target_inst=0, $a_source_lang="-")
	save internal link information More...
	_getSourcesOfTarget ($a_target_type, $a_target_id, $a_target_inst)
	get all sources of a link target More...
	_getTargetsOfSource ($a_source_type, $a_source_id, $a_source_lang="-")
	Get all targets of a source object (e.g., a page) More...
	_getIdForImportId ($a_type, $a_target)
	Get current id for an import id. More...
	_exists ($a_type, $a_target)
	Check if internal link refers to a valid target. More...
	_extractInstOfTarget ($a_target)
	Extract installation id out of target. More...
	_removeInstFromTarget ($a_target)
	Removes installation id from target string. More...
	_extractObjIdOfTarget ($a_target)
	Extract object id out of target. More...
	_extractTypeOfTarget ($a_target)
	Extract type out of target. More...

Detailed Description

Class ilInternalLink.

Some methods to handle internal links

Author

Alex Killing alex..nosp@m.kill.nosp@m.ing@g.nosp@m.mx.d.nosp@m.e

Version

$Id$

Definition at line 14 of file class.ilInternalLink.php.

Member Function Documentation

_deleteAllLinksOfSource()

ilInternalLink::_deleteAllLinksOfSource	(		$a_source_type,
			$a_source_id,
			$a_lang = "-"
	)

Delete all links of a given source.

Parameters

string	$a_source_type	source type
int	$a_source_if	source id
int	$a_lang	source language

Definition at line 23 of file class.ilInternalLink.php.

        {
                global $ilias, $ilDB;
 
                $lang_where = "";
                if ($a_lang != "")
                {
                        $lang_where = " AND source_lang = ".$ilDB->quote($a_lang, "text");
                }
                
                $q = "DELETE FROM int_link WHERE source_type = ".
                        $ilDB->quote($a_source_type, "text")." AND source_id=".
                        $ilDB->quote((int) $a_source_id, "integer").
                        $lang_where;
                $ilDB->manipulate($q);
        }

References $ilDB.

Referenced by SurveyQuestion\_resolveIntLinks(), assQuestion\_resolveIntLinks(), SurveyQuestion\delete(), ilPageObject\deleteInternalLinks(), assQuestion\deleteSuggestedSolutions(), SurveyQuestion\saveMaterial(), and SurveyQuestion\syncWithOriginal().

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_deleteAllLinksToTarget()

ilInternalLink::_deleteAllLinksToTarget	(		$a_target_type,
			$a_target_id,
			$a_target_inst = 0
	)

Delete all links to a given target.

Parameters

string	$a_target_type	target type
int	$a_target_id	target id
int	$a_target_inst	target installation id

Definition at line 47 of file class.ilInternalLink.php.

        {
                global $ilias, $ilDB;
 
                $ilDB->manipulateF("DELETE FROM int_link WHERE target_type = %s ".
                        " AND target_id = %s AND target_inst = %s ",
                        array("text", "integer", "integer"),
                        array($a_target_type, (int) $a_target_id, (int) $a_target_inst));
        }

References $ilDB.

Referenced by ilPortfolioPage\delete(), and ilWikiPage\delete().

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_exists()

ilInternalLink::_exists	(		$a_type,
			$a_target
	)

Check if internal link refers to a valid target.

Parameters

string	$a_type	target type ("PageObject" | "StructureObject" | "GlossaryItem" | "MediaObject")
string	$a_target	target id, e.g. "il__pg_244")

Returns

boolean true/false

Definition at line 253 of file class.ilInternalLink.php.

        {
                global $tree;
                
                switch($a_type)
                {
                        case "PageObject":
                        case "StructureObject":
                                return ilLMObject::_exists($a_target);
                                break;
 
                        case "GlossaryItem":
                                return ilGlossaryTerm::_exists($a_target);
                                break;
 
                        case "MediaObject":
                                return ilObjMediaObject::_exists($a_target);
                                break;
                                
                        case "WikiPage":
                                include_once("./Modules/Wiki/classes/class.ilWikiPage.php");
                                return ilWikiPage::_exists("wiki", (int)$a_target);
                                break;
                                
                        case "RepositoryItem":
                                if (is_int(strpos($a_target, "_")))
                                {
                                        $ref_id = ilInternalLink::_extractObjIdOfTarget($a_target);
                                        return $tree->isInTree($ref_id);
                                }
                                break;
                }
                return false;
        }

References $ref_id, ilGlossaryTerm\_exists(), ilLMObject\_exists(), ilObjMediaObject\_exists(), ilPageObject\_exists(), and _extractObjIdOfTarget().

Referenced by ilPageObject\resolveIntLinks().

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_extractInstOfTarget()

ilInternalLink::_extractInstOfTarget

(

$a_target

)

Extract installation id out of target.

Parameters

string

$a_target

import target id (e.g. "il_2_pg_22")

Definition at line 294 of file class.ilInternalLink.php.

        {
                if (!is_int(strpos($a_target, "__")))
                {
                        $target = explode("_", $a_target);
                        if ($target[1] > 0)
                        {
                                return $target[1]; 
                        }
                }
                return false;
        }

Referenced by _getIdForImportId(), ilPageObject\_handleImportRepositoryLinks(), ilPCQuestion\afterPageUpdate(), ilPCQuestionGUI\edit(), ilQuestionExporter\exportQuestion(), ilPCQuestionGUI\feedback(), ilPageObject\getQuestionIds(), ilPageObject\newIIMCopies(), ilPageObject\newMobCopies(), ilPageObject\newQuestionCopies(), ilPageObject\resolveIntLinks(), ilPCQuestionGUI\setTabs(), and ilLMObject\updateInternalLinks().

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_extractObjIdOfTarget()

ilInternalLink::_extractObjIdOfTarget

(

$a_target

)

Extract object id out of target.

Parameters

string

$a_target

import target id (e.g. "il_2_pg_22")

Definition at line 330 of file class.ilInternalLink.php.

        {
                $target = explode("_", $a_target);
                return $target[count($target) - 1];
        }

Referenced by ilGlossaryTerm\_exists(), ilLMObject\_exists(), ilSCORM2004Node\_exists(), ilObjMediaObject\_exists(), _exists(), ilPageObject\_handleImportRepositoryLinks(), ilPCQuestion\afterPageUpdate(), ilPCQuestionGUI\edit(), ilSCORM2004Asset\exportHTMLPageObjects(), ilQuestionExporter\exportQuestion(), ilPCQuestionGUI\feedback(), ilPageObject\getInitialOpenedContent(), ilObjMediaObject\getLinkedMediaObjects(), ilPageObject\getQuestionIds(), ilPageObject\moveIntLinks(), ilPageObject\newIIMCopies(), ilPageObject\newMobCopies(), ilPageObject\newQuestionCopies(), ilPCInteractiveImage\setNode(), ilPCQuestionGUI\setTabs(), and ilLMObject\updateInternalLinks().

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_extractTypeOfTarget()

ilInternalLink::_extractTypeOfTarget

(

$a_target

)

Extract type out of target.

Parameters

string

$a_target

import target id (e.g. "il_2_pg_22")

Definition at line 341 of file class.ilInternalLink.php.

        {
                $target = explode("_", $a_target);
                return $target[count($target) - 2];
        }

Referenced by ilLMObject\updateInternalLinks().

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_getIdForImportId()

ilInternalLink::_getIdForImportId	(		$a_type,
			$a_target
	)

Get current id for an import id.

Parameters

string	$a_type	target type ("PageObject" | "StructureObject" | "GlossaryItem" | "MediaObject")
string	$a_target	import target id (e.g. "il_2_pg_22")

Returns

string current target id (e.g. "il__pg_244")

Definition at line 157 of file class.ilInternalLink.php.

        {
                include_once("./Modules/LearningModule/classes/class.ilLMObject.php");
                switch($a_type)
                {
                        case "PageObject":
                                $id = ilLMObject::_getIdForImportId($a_target);
                                if($id > 0)
                                {
                                        return "il__pg_".$id;
                                }
                                break;
 
                        case "StructureObject":
                                $id = ilLMObject::_getIdForImportId($a_target);
                                if($id > 0)
                                {
                                        return "il__st_".$id;
                                }
                                break;
 
                        case "GlossaryItem":
                                $id = ilGlossaryTerm::_getIdForImportId($a_target);
                                if($id > 0)
                                {
                                        return "il__git_".$id;
                                }
                                break;
 
                        case "WikiPage":
                                // no import IDs for wiki pages (yet)
                                //$id = ilGlossaryTerm::_getIdForImportId($a_target);
                                $id = 0;
                                if($id > 0)
                                {
                                        return "il__wpage_".$id;
                                }
                                break;
 
                        case "MediaObject":
                                $id = ilObjMediaObject::_getIdForImportId($a_target);
                                if($id > 0)
                                {
                                        return "il__mob_".$id;
                                }
                                break;
                                
                        case "RepositoryItem":
                                
                                $tarr = explode("_", $a_target);
                                $import_id = $a_target;
                                
                                // if a ref id part is given, strip this
                                // since this will not be part of an import id
                                if ($tarr[4] != "")
                                {
                                        $import_id = $tarr[0]."_".$tarr[1]."_".$tarr[2]."_".$tarr[3]; 
                                }
                                if (ilInternalLink::_extractInstOfTarget($a_target) == IL_INST_ID
                                        && IL_INST_ID > 0)
                                {
                                        // does it have a ref id part?
                                        if ($tarr[4] != "")
                                        {
                                                return "il__obj_".$tarr[4];
                                        }
                                }
                                
                                $id = ilObject::_getIdForImportId($import_id);
//echo "-$a_target-$id-";
                                // get ref id for object id
                                // (see ilPageObject::insertInstIntoIDs for the export procedure)
                                if($id > 0)
                                {
                                        $refs = ilObject::_getAllReferences($id);
//var_dump($refs);
                                        foreach ($refs as $ref)
                                        {
                                                return "il__obj_".$ref;
                                        }
                                }
                                break;
 
                }
                return false;
        }

References _extractInstOfTarget(), ilObject\_getAllReferences(), ilGlossaryTerm\_getIdForImportId(), ilLMObject\_getIdForImportId(), and ilObject\_getIdForImportId().

Referenced by SurveyQuestion\_resolveInternalLink(), assQuestion\_resolveInternalLink(), ilMapArea\_resolveIntLinks(), and ilPageObject\resolveIntLinks().

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_getSourcesOfTarget()

ilInternalLink::_getSourcesOfTarget	(		$a_target_type,
			$a_target_id,
			$a_target_inst
	)

get all sources of a link target

Parameters

string	$a_target_type	target type
int	$a_target_id	target id
int	$a_target_inst	target installation id

Returns

array sources (array of array("type", "id"))

Definition at line 93 of file class.ilInternalLink.php.

        {
                global $ilias, $ilDB;
 
                $q = "SELECT * FROM int_link WHERE ".
                        "target_type = ".$ilDB->quote($a_target_type, "text")." AND ".
                        "target_id = ".$ilDB->quote((int) $a_target_id, "integer")." AND ".
                        "target_inst = ".$ilDB->quote((int) $a_target_inst, "integer");
                $source_set = $ilDB->query($q);
                $sources = array();
                while ($source_rec = $ilDB->fetchAssoc($source_set))
                {
                        $sources[$source_rec["source_type"].":".$source_rec["source_id"].":".$source_rec["source_lang"]] =
                                array("type" => $source_rec["source_type"], "id" => $source_rec["source_id"],
                                        "lang" => $source_rec["source_lang"]);
                }
 
                return $sources;
        }

References $ilDB.

Referenced by ilPageObject\_handleImportRepositoryLinks(), ilWebAccessChecker\checkAccessGlossaryTerm(), ilWikiPage\getLinksToPage(), ilWikiPage\getOrphanedPages(), ilGlossaryTerm\getUsages(), ilGlossaryPresentationGUI\listDefinitions(), ilContObjParser\processPagesToParse(), ilWikiPage\rename(), and ilLMObject\updateInternalLinks().

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_getTargetsOfSource()

ilInternalLink::_getTargetsOfSource	(		$a_source_type,
			$a_source_id,
			$a_source_lang = "-"
	)

Get all targets of a source object (e.g., a page)

Parameters

string	$a_source_type	source type (e.g. "lm:pg" | "dbk:pg")
int	$a_source_id	source id

Returns

array targets (array of array("type", "id", "inst"))

Definition at line 121 of file class.ilInternalLink.php.

        {
                global $ilDB;
 
                $lang_where = "";
                if ($a_source_lang != "")
                {
                        $lang_where = " AND source_lang = ".$ilDB->quote($a_source_lang, "text");
                }
 
                $q = "SELECT * FROM int_link WHERE ".
                        "source_type = ".$ilDB->quote($a_source_type, "text")." AND ".
                        "source_id = ".$ilDB->quote((int) $a_source_id, "integer").
                        $lang_where;
 
                $target_set = $ilDB->query($q);
                $targets = array();
                while ($target_rec = $ilDB->fetchAssoc($target_set))
                {
                        $targets[$target_rec["target_type"].":".$target_rec["target_id"].":".$target_rec["target_inst"]] =
                                array("type" => $target_rec["target_type"], "id" => $target_rec["target_id"],
                                "inst" => $target_rec["target_inst"]);
                }
 
                return $targets;
        }

References $ilDB.

Referenced by ilObjContentObject\exportHTMLPages(), ilSCORM2004Asset\getGlossaryTermIds(), ilPageObjectGUI\showPage(), and ilLMPresentationGUI\showPrintView().

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_removeInstFromTarget()

ilInternalLink::_removeInstFromTarget

(

$a_target

)

Removes installation id from target string.

Parameters

string

$a_target

import target id (e.g. "il_2_pg_22")

Definition at line 312 of file class.ilInternalLink.php.

        {
                if (!is_int(strpos($a_target, "__")))
                {
                        $target = explode("_", $a_target);
                        if ($target[1] > 0)
                        {
                                return "il__".$target[2]."_".$target[3]; 
                        }
                }
                return false;
        }

Referenced by ilPageObject\resolveIntLinks().

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_saveLink()

ilInternalLink::_saveLink	(		$a_source_type,
			$a_source_id,
			$a_target_type,
			$a_target_id,
			$a_target_inst = 0,
			$a_source_lang = "-"
	)

save internal link information

Parameters

string	$a_source_type	source type
int	$a_source_if	source id
string	$a_target_type	target type
int	$a_target_id	target id
int	$a_target_inst	target installation id

Definition at line 66 of file class.ilInternalLink.php.

        {
                global $ilDB;
 
                $ilDB->replace("int_link",
                        array(
                                "source_type" => array("text", $a_source_type),
                                "source_id" => array("integer", (int) $a_source_id),
                                "source_lang" => array("text", $a_source_lang),
                                "target_type" => array("text", $a_target_type),
                                "target_id" => array("integer", (int) $a_target_id),
                                "target_inst" => array("integer", (int) $a_target_inst)
                        ),
                        array()
                );
        }

References $ilDB.

Referenced by SurveyQuestion\_resolveIntLinks(), assQuestion\_resolveIntLinks(), ilWikiPage\saveInternalLinks(), ilPageObject\saveInternalLinks(), SurveyQuestion\saveMaterial(), and SurveyQuestion\syncWithOriginal().

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The documentation for this class was generated from the following file:

• Services/Link/classes/class.ilInternalLink.php