<?php
class Dao extends Bdd {

	private $mode;
	
	private $table_liaison;
	private $table_mots_cles;
	private $champ_id_element_lie;
	
	public function __construct($mode) {
		parent::__construct();
		$this->mode = $mode;
		
		if($mode == 'obs') {
			$this->table_liaison = 'cel_mots_cles_obs_liaison';
			$this->table_mots_cles = 'cel_arbre_mots_cles_obs';
		} else {
			$this->table_liaison = 'cel_mots_cles_images_liaison';
			$this->table_mots_cles = 'cel_arbre_mots_cles_images';
		}
	}
	
	public function viderTables() {
		$requete = "TRUNCATE ".$this->table_mots_cles." ";
		$vidage = $this->requeter($requete.' -- '.__FILE__.':'.__LINE__);
	
		$requete = "TRUNCATE ".$this->table_liaison." ";
		$vidage = $this->requeter($requete.' -- '.__FILE__.':'.__LINE__);
	
		return $vidage;
	}
	
	public function obtenirMotsClesOriginaux() {
	
		if($this->mode == 'obs') {
			$requete_arbre = "SELECT id_mot_cle_obs as id_mot_cle, ce_mot_cle_obs_parent as parent, id_utilisateur, mot_cle ".
								"FROM cel_mots_cles_obs WHERE niveau != 0 AND id_utilisateur != '' ORDER BY id_utilisateur, niveau";
		} else {
			$requete_arbre = "SELECT id_mot_cle_image as id_mot_cle, ce_mot_cle_image_parent as parent, id_utilisateur, mot_cle ".
								"FROM cel_mots_cles_images WHERE niveau != 0 AND id_utilisateur != '' ORDER BY id_utilisateur, niveau";
		}

		$mots_cles = $this->recupererTous($requete_arbre);	
		return $mots_cles;
	}
	
	public function obtenirLiaisonsMotsClesOriginaux() {
		if($this->mode == 'obs') {
			$requete_liaisons = "SELECT comc.id_observation as id_element_lie, comc.id_mot_cle_obs as id_mot_cle, id_utilisateur as id_utilisateur ".
															"FROM cel_obs_mots_cles comc ".
															"INNER JOIN cel_obs o ON o.id_observation = comc.id_observation ";
		} else {
			$requete_liaisons = "SELECT comc.id_image as id_element_lie, comc.id_mot_cle_image as id_mot_cle, o.ce_utilisateur as id_utilisateur ".
																		"FROM cel_images_mots_cles comc ".
																		"INNER JOIN cel_images o ON o.id_image = comc.id_image ";
		}
		$liaisons = $this->recupererTous($requete_liaisons);
		return $liaisons;
	}
	
	public function insererMotsCles($mots_cles) {
		$requete_insertion_mots_cles = "INSERT INTO ".$this->table_mots_cles." (chemin, id_utilisateur, mot_cle) ".
						                     			" VALUES ";
		
		foreach($mots_cles as $cle => $mot_cle) {
			$requete_insertion_mots_cles .= "(".
			$this->proteger($mot_cle['chemin']).", ".
			$this->proteger($mot_cle['id_utilisateur']).", ".
			$this->proteger($mot_cle['mot_cle'])." ".
							"), ";
		}
		
		$requete_insertion_mots_cles = rtrim($requete_insertion_mots_cles, ", ");
		return $this->requeter($requete_insertion_mots_cles);
	}
	
	public function obtenirInfosNouveauxMotsCles() {
		$requete = "SELECT id_mot_cle, id_utilisateur, chemin FROM ".$this->table_mots_cles;
		return $this->recupererTous($requete);
	}
	
	public function insererLiaisonsMotsCles($mots_cles, $liaisons, $correspondances) {
		$requete_insertion_liaisons = "INSERT INTO ".$this->table_liaison." (id_element_lie, id_mot_cle) ".
												      " VALUES ";
		$lier = false;
		$mot_cles_inexistants = 0;
		
		foreach($liaisons as &$liaison_mot_cle) {
			$cle = $liaison_mot_cle['id_mot_cle'].'-'.$liaison_mot_cle['id_utilisateur'];
			if(isset($mots_cles[$cle])) {
				$cle_id_mot_cle_migre = $mots_cles[$cle]['chemin'].'-'.$liaison_mot_cle['id_utilisateur'];
				if(isset($correspondances[$cle_id_mot_cle_migre])) {
					$id_mot_cle_migre = $correspondances[$cle_id_mot_cle_migre]['id_mot_cle'];
					$requete_insertion_liaisons .= "(".
						$this->proteger($liaison_mot_cle['id_element_lie']).", ".
						$this->proteger($id_mot_cle_migre)." ".
									"), ";
					$lier = true;
				} else {
					$mot_cles_inexistants++;
				}
			}
		}

		if($lier) {
			$requete_insertion_liaisons = rtrim($requete_insertion_liaisons, ", ");
			$this->requeter($requete_insertion_liaisons);
		}
		if($mot_cles_inexistants != 0) {
			echo $mot_cles_inexistants."\n";
		}
	}
}