First version of the WordsCloud site

db.php

@@ -0,0 +1,169 @@
+<?php
+class DataBase
+{
+	private $db;
+
+	public function __construct()
+	{
+		$this->init();
+	}
+
+	public function init()
+	{
+		try {
+			$this->db = new PDO('sqlite:test.db');
+			$this->db->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
+		} catch (PDOException $e) {
+			echo $e->getMessage();
+			return null;
+		}
+		$stmt = $this->db->prepare('PRAGMA foreign_keys = 1;');
+		$stmt->execute();
+	}
+
+	public function isInit()
+	{
+		return isset($this->db);
+	}
+
+	public function buildTables()
+	{
+		$stmt = $this->db->prepare('CREATE TABLE IF NOT EXISTS clouds('
+		      . 'id_cloud INTEGER PRIMARY KEY, '
+		      . 'code TEXT NOT NULL UNIQUE, '
+		      . 'create_t TIMESTAMP DEFAULT CURRENT_TIMESTAMP);'
+		);
+		$stmt->execute();
+		$stmt = $this->db->prepare('CREATE TABLE IF NOT EXISTS words('
+		      . 'id_word INTEGER PRIMARY KEY, '
+		      . 'word TEXT NOT NULL, '
+		      . 'count INT DEFAULT 1, '
+		      . 'cloud_id INT NOT NULL, '
+		      . 'FOREIGN KEY (cloud_id) '
+	         . 'REFERENCES clouds(id_cloud) ON UPDATE CASCADE '
+	         . 'ON DELETE CASCADE);'
+		);
+		$stmt->execute();
+	}
+
+	public function addWord(string $cloud, string $word)
+	{
+		if (empty($word)) {
+			return false;
+		}
+		$stmt = $this->db->prepare('SELECT * FROM clouds WHERE code = :id;');
+		$stmt->bindValue(':id', $cloud, PDO::PARAM_STR);
+		$stmt->execute();
+		$cloudId = null;
+		if ($data = $stmt->fetch()) {
+			$cloudId = $data['id_cloud'];
+		} else {
+			return false;
+		}
+		$stmt = $this->db->prepare('SELECT * FROM words '
+		      . 'WHERE cloud_id = :cid AND word = :w;'
+		);
+		$stmt->bindValue(':cid', $cloudId, PDO::PARAM_INT);
+		$stmt->bindValue(':w', $word, PDO::PARAM_STR);
+		$stmt->execute();
+		if ($data = $stmt->fetch()) {
+			$wordId = $data['id_word'];
+			$stmt = $this->db->prepare(
+				'UPDATE words SET count = count + 1 WHERE id_word = :id;'
+			);
+			$stmt->bindValue(':id', $wordId, PDO::PARAM_INT);
+			$stmt->execute();
+		} else {
+			$stmt = $this->db->prepare(
+				'INSERT INTO words(word, cloud_id) VALUES(:w, :cid);'
+			);
+			$stmt->bindValue(':w', $word, PDO::PARAM_STR);
+			$stmt->bindValue(':cid', $cloudId, PDO::PARAM_INT);
+			$stmt->execute();
+		}
+	}
+	public function getWords(string $id)
+	{
+		$stmt = $this->db->prepare('SELECT * FROM words '
+		      . 'JOIN clouds ON words.cloud_id = clouds.id_cloud '
+		      . 'WHERE code = :id;'
+		);
+		$stmt->bindValue(':id', $id);
+		$stmt->execute();
+		$words = [];
+		$values = [];
+		while ($data = $stmt->fetch()) {
+			$words[] = array($data['word'], $data['count']);
+			$values[] = $data['count'];
+			$total += $data['count'];
+		}
+
+		array_multisort($values, SORT_DESC, $words);
+		return $words;
+	}
+
+	public function getWordsPercentage(string $id)
+	{
+		$words = $this->getWords($id);
+		//echo 'test';
+		//var_dump($words);
+		$total = 0;
+		foreach ($words as $word) {
+			$total += $word[1];
+		}
+		foreach ($words as $key => $word) {
+			$words[$key] = array($word[0], $word[1] / $total);
+		}
+
+		return $words;
+	}
+
+	public function getWordsMax(string $id)
+	{
+		$words = $this->getWords($id);
+		//echo 'test';
+		//var_dump($words);
+		$max = 0;
+		foreach ($words as $word) {
+			$max = max($max, $word[1]);
+		}
+		foreach ($words as $key => $word) {
+			$words[$key] = array($word[0], $word[1] / $max);
+		}
+
+		return $words;
+	}
+
+	public function createCloud(string $ref)
+	{
+		$stmt = $this->db->prepare('INSERT INTO clouds(code) VALUES(:code);');
+		$stmt->bindValue(':code', $ref);
+		try {
+			$stmt->execute();
+		} catch (PDOEXception $e) {
+			return false;
+		}
+		return true;
+	}
+
+	public function cleanCloud()
+	{
+		$stmt = $this->db->prepare('DELETE FROM clouds '
+		      . "WHERE create_t < (SELECT datetime('now', '-1 week'));"
+		);
+		$stmt->execute();
+		return true;
+	}
+
+	public function isCloud(string $id)
+	{
+		$stmt = $this->db->prepare('SELECT * FROM clouds WHERE code = :id;');
+		$stmt->bindValue(':id', $id, PDO::PARAM_STR);
+		$stmt->execute();
+		if ($stmt->fetch()) {
+			return true;
+		}
+		return false;
+	}
+
+}