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177 ariadna 1 
<?php
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class StaticsBlocks
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{
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    public $user;
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    public $userID;
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    public $currentUser;
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    public $blockManager;
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    public $blockExists;
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    public $blockNames;
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    public $regionName;
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    public function __construct($regionName, $blockNames)
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    {
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        global $USER, $PAGE;
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        require_login(null, false);
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        if (isguestuser()) {
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            throw new require_login_exception('Guests are not allowed here.');
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        }
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        $this->userID = optional_param('userid', $USER->id, PARAM_INT);
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        $this->currentUser = $this->userID == $USER->id;
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        $this->user = core_user::get_user($this->userID);
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        $this->blockManager = $PAGE->blocks;
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        $this->blockNames = $blockNames;
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        $this->regionName = $regionName;
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        if (!$this->user || !core_user::is_real_user($this->userID)) {
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            throw new moodle_exception('invaliduser', 'error');
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        }
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    }
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    public function addRegion()
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    {
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        if (!in_array($this->regionName, $this->blockManager->get_regions())) {
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            $this->blockManager->add_region($this->regionName);
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        }
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    }
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    public function validateIfExistBlocks()
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    {
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        $blocks = $this->blockManager->get_blocks_for_region($this->regionName);
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        $this->blockExists = true;
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        foreach ($this->blockNames as $blockName) {
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            $blockFound = false;
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            foreach ($blocks as $block) {
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                $blockclass = get_class($block);
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                if ($blockclass == 'block_' . $blockName) {
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                    $blockFound = true;
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                    break;
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                }
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            }
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            if (!$blockFound) {
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                $this->blockExists = false;
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                break; // Si un bloque no existe, no es necesario seguir buscando
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            }
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        }
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        return $this->blockExists;
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    }
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    public function addBlocksIfNotExist()
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    {
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        if (!$this->blockExists) {
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            foreach ($this->blockNames as $blockName) {
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                $this->blockManager->add_block($blockName, $this->regionName, 1, true);
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            }
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        }
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    }
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    public function renderBlocks()
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    {
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        global $OUTPUT;
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        $blocksView = '';
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        $this->addRegion(); // Validar si la región existe y añadirla en caso de no existir
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        $this->validateIfExistBlocks(); // Valida si el listado de bloques pasados por parametros coincide con los bloques cargados
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        $this->addBlocksIfNotExist(); // Agrega los bloques en caso de no coincidir
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        $blocksView .= $OUTPUT->blocks_for_region($this->regionName); // Renderizar los bloques de la región
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        return $blocksView; // Devolver bloques renderizados
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    }
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}