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97 lines
2.7 KiB
PHP
97 lines
2.7 KiB
PHP
<?php
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require_once('Models/BasicModel.php');
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require_once('Objects/News.php');
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/**
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* The NewsModel class will generate News objects
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*/
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abstract class NewsModel extends BasicModel {
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const NO_FILES = 'No news files found.';
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const INVALID_DATE = 'Invalid date, use YYYYMMDD.';
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const FILE_NOT_FOUND = 'The requested news file doesn\'t exist.';
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/* Get a list of all the available news dates. */
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static public function getListOfNewsDates() {
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if (!($files = scandir(DIR_NEWS))) {
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throw new ErrorException(self::NO_FILES);
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}
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$dates = array();
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foreach ($files as $file) {
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if (substr($file, -4) != '.xml') {
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continue;
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}
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$dates[] = substr($file, 0, -4);
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}
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sort($dates, SORT_NUMERIC);
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return $dates;
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}
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/* Get all news items ordered by date, descending. */
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static public function getAllNews() {
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if (!($files = scandir(DIR_NEWS))) {
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throw new ErrorException(self::NO_FILES);
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}
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$news = array();
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foreach ($files as $filename) {
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if (substr($filename, -4) != '.xml') {
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continue;
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}
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if (!($data = @file_get_contents(DIR_NEWS . "/{$filename}"))) {
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continue;
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}
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$news[] = new News($data, $filename);
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}
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return array_reverse($news);
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}
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/* Get the latest number of news items, or if no number is specified get all news items. */
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static public function getLatestNews($num=-1) {
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if ($num == -1) {
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return NewsModel::getAllNews();
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} else {
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if (!($newslist = NewsModel::getListOfNewsDates())) {
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throw new ErrorException(self::NO_FILES);
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}
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rsort($newslist, SORT_NUMERIC);
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$newslist = array_slice($newslist, 0, $num);
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$news = array();
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foreach ($newslist as $date) {
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$news[] = NewsModel::getOneByDate($date);
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}
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return $news;
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}
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}
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/* Get the news item that was posted on a specific date. */
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static public function getOneByDate($date) {
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if (is_null($date) || !preg_match('/^\d{8}[a-z]?$/', $date)) {
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throw new ErrorException(self::INVALID_DATE);
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}
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if (!is_file(($fname = DIR_NEWS . "/{$date}.xml"))
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|| !is_readable($fname) || !($data = @file_get_contents($fname))) {
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throw new ErrorException(self::FILE_NOT_FOUND);
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}
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return new News($data, $fname);
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}
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/* Get the news item that was posted on a specific date. */
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static public function getAllByDate($date) {
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if ($date == null || !is_numeric($date) || strlen($date) != 8) {
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throw new ErrorException(self::INVALID_DATE);
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}
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$files = glob(DIR_NEWS . "/{$date}*.xml");
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if (!is_array($files) || count($files) == 0) {
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throw new ErrorException(self::FILE_NOT_FOUND);
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}
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natsort($files);
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$files = array_reverse($files);
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$news = array();
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foreach ($files as $filename) {
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if (($data = @file_get_contents($filename))) {
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$news[] = new News($data, $filename);
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}
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}
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return $news;
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}
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}
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?>
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