class.ilMultilingualism.php

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<?php
 
class ilMultilingualism
{
    protected ilLanguage $lng;
    protected ilDBInterface $db;
    protected int $obj_id;
    protected array $languages = [];
    protected string $type = "";
    protected static array $instances = [];
 
    private function __construct(
        int $a_obj_id,
        string $a_type
    ) {
        global $DIC;
 
        $this->lng = $DIC->language();
        $ilDB = $DIC->database();
 
        $this->db = $ilDB;
 
        $this->setObjId($a_obj_id);
        $this->setType($a_type);
 
        if ($this->getObjId() <= 0) {
            throw new ilObjectException("Translation: No object ID passed.");
        }
 
        $this->read();
    }
 
    public static function getInstance(int $a_obj_id, string $a_type): self
    {
        if (!isset(self::$instances[$a_type][$a_obj_id])) {
            self::$instances[$a_type][$a_obj_id] = new self($a_obj_id, $a_type);
        }
 
        return self::$instances[$a_type][$a_obj_id];
    }
 
    public function setObjId(int $a_val): void
    {
        $this->obj_id = $a_val;
    }
 
    public function getObjId(): int
    {
        return $this->obj_id;
    }
 
    public function setLanguages(array $a_val): void
    {
        $this->languages = $a_val;
    }
 
    public function getLanguages(): array
    {
        return $this->languages;
    }
 
    public function getType(): string
    {
        return $this->type;
    }
 
    public function setType(string $type): void
    {
        $this->type = $type;
    }
 
    public function getDefaultLanguage(): string
    {
        $lng = $this->lng;
 
        foreach ($this->languages as $k => $v) {
            if ($v["lang_default"]) {
                return $k;
            }
        }
 
        return $lng->getDefaultLanguage();
    }
 
 
    public function addLanguage(
        string $a_lang,
        string $a_title,
        string $a_description,
        bool $a_default,
        bool $a_force = false
    ): void {
        if ($a_lang !== "" && (!isset($this->languages[$a_lang]) || $a_force)) {
            if ($a_default) {
                foreach ($this->languages as $k => $l) {
                    $this->languages[$k]["lang_default"] = false;
                }
            }
            $this->languages[$a_lang] = [
                "lang_code" => $a_lang,
                "lang_default" => $a_default,
                "title" => $a_title,
                "description" => $a_description
            ];
        }
    }
 
    public function getDefaultTitle(): string
    {
        foreach ($this->languages as $l) {
            if ($l["lang_default"]) {
                return $l["title"];
            }
        }
        return "";
    }
 
    public function setDefaultTitle(string $a_title): void
    {
        foreach ($this->languages as $k => $l) {
            if ($l["lang_default"]) {
                $this->languages[$k]["title"] = $a_title;
            }
        }
    }
 
    public function getDefaultDescription(): string
    {
        foreach ($this->languages as $l) {
            if ($l["lang_default"]) {
                return $l["description"];
            }
        }
        return "";
    }
 
    public function setDefaultDescription(string $a_description): void
    {
        foreach ($this->languages as $k => $l) {
            if ($l["lang_default"]) {
                $this->languages[$k]["description"] = $a_description;
            }
        }
    }
 
 
    public function removeLanguage(string $a_lang): void
    {
        if ($a_lang !== $this->getDefaultLanguage()) {
            unset($this->languages[$a_lang]);
        }
    }
 
    public function read(): void
    {
        $this->setLanguages(array());
        $set = $this->db->query(
            "SELECT * FROM il_dt_translations " .
            " WHERE id = " . $this->db->quote($this->getObjId(), "integer") .
            " AND id_type = " . $this->db->quote($this->getType(), "text")
        );
        while ($rec = $this->db->fetchAssoc($set)) {
            $this->addLanguage(
                $rec["lang_code"],
                (string) $rec["title"],
                (string) $rec["description"],
                (bool) $rec["lang_default"]
            );
        }
    }
 
    public function delete(): void
    {
        $this->db->manipulate(
            "DELETE FROM il_dt_translations " .
            " WHERE id = " . $this->db->quote($this->getObjId(), "integer") .
            " AND id_type = " . $this->db->quote($this->getType(), "text")
        );
    }
 
    public function save(): void
    {
        $this->delete();
 
        foreach ($this->getLanguages() as $l => $trans) {
            $this->db->manipulate($t = "INSERT INTO il_dt_translations " .
                "(id, id_type, title, description, lang_code, lang_default) VALUES (" .
                $this->db->quote($this->getObjId(), "integer") . "," .
                $this->db->quote($this->getType(), "text") . "," .
                $this->db->quote($trans["title"], "text") . "," .
                $this->db->quote($trans["description"], "text") . "," .
                $this->db->quote($l, "text") . "," .
                $this->db->quote($trans["lang_default"], "integer") .
                ")");
        }
    }
 
    public function copy(int $a_obj_id): self
    {
        $target_ml = new self($a_obj_id, $this->getType());
        $target_ml->setLanguages($this->getLanguages());
        $target_ml->save();
        return $target_ml;
    }
 
 
 
    public function toXml(
        ilXmlWriter $writer
    ): ilXmlWriter {
        $writer->xmlStartTag('translations');
 
        foreach ($this->getLanguages() as $k => $v) {
            $writer->xmlStartTag('translation', array('language' => $k, 'default' => $v['lang_default'] ? 1 : 0));
            $writer->xmlElement('title', array(), $v['title']);
            $writer->xmlElement('description', array(), $v['description']);
            $writer->xmlEndTag('translation');
        }
        $writer->xmlEndTag('translations');
 
        return $writer;
    }
 
    public function fromXML(SimpleXMLElement $root): void
    {
        if ($root->translations) {
            $root = $root->translations;
        }
 
        foreach ($root->translation as $trans) {
            $this->addLanguage(
                trim($trans["language"]),
                trim($trans->title),
                trim($trans->description),
                (int) $trans["default"] !== 0
            );
        }
    }
}