370 lines
17 KiB
PHP
370 lines
17 KiB
PHP
<?php
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declare(strict_types=1);
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namespace FecaMailshots\Admin;
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use FecaMailshots\Application\MailshotRunService;
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use FecaMailshots\Application\MailshotService;
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use FecaMailshots\WordPress\WordPressFacade;
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final class DownloadPdfAdminPage
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{
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use AdminRequestHelpers;
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private const CAPABILITY = 'edit_pages';
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private const RESULT_OPTION_KEY = 'feca_mailshots_download_pdf_ui_result';
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private const PAGE_SLUG = 'feca-mailshots-download-pdf';
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private const DOWNLOAD_MEMORY_LIMIT_ENV = 'FECA_MAILSHOTS_DOWNLOAD_MEMORY_LIMIT';
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private const DOWNLOAD_MEMORY_LIMIT_OPTION = 'feca_mailshots_download_memory_limit';
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private const DEFAULT_DOWNLOAD_MEMORY_LIMIT = '512M';
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private const NONCE_ACTION = 'feca_mailshots_download_pdf';
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/** @var callable(): MailshotRunService */
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private $runServiceFactory;
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/** @var callable(): MailshotService */
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private $mailshotServiceFactory;
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private WordPressFacade $wp;
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/** @param callable(): MailshotRunService $runServiceFactory @param callable(): MailshotService $mailshotServiceFactory */
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public function __construct(callable $runServiceFactory, callable $mailshotServiceFactory, WordPressFacade $wp)
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{
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$this->runServiceFactory = $runServiceFactory;
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$this->mailshotServiceFactory = $mailshotServiceFactory;
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$this->wp = $wp;
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}
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public function register(): void
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{
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$this->wp->addAction('admin_menu', [$this, 'registerMenu']);
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$this->wp->addAction('admin_post_feca_mailshots_download_pdf_ui', [$this, 'handleDownloadUi']);
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}
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public function registerMenu(): void
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{
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$this->wp->addSubmenuPage('feca-mailshot', 'Download PDF', 'Download PDF', self::CAPABILITY, self::PAGE_SLUG, [$this, 'render']);
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}
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public function render(): void
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{
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if (!$this->wp->currentUserCan(self::CAPABILITY)) {
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echo 'Permission denied';
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return;
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}
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$mailshots = $this->mailshotService()->list();
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$selectedMailshotId = (int) ($this->wp->requestParam('mailshot_id', '0') ?? '0');
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if ($selectedMailshotId <= 0 && $mailshots !== []) {
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$selectedMailshotId = (int) ($mailshots[0]['id'] ?? 0);
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}
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$result = $this->consumeOptionArray(self::RESULT_OPTION_KEY);
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$action = htmlspecialchars($this->wp->adminUrl('admin-post.php'));
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echo '<div class="wrap feca-mailshots-admin"><h1>Download PDF</h1>';
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echo $this->renderAdminUiStyles();
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echo '<p>Run the selected mailshot without sending any email, and download generated PDF attachments.</p>';
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if ($result !== null) {
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$ok = !empty($result['ok']);
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$bannerClass = $ok ? 'feca-banner-success' : 'feca-banner-error';
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echo '<div class="feca-banner ' . $bannerClass . '">';
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echo '<strong>' . ($ok ? 'PDF generation succeeded.' : 'PDF generation failed.') . '</strong>';
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if (!empty($result['errors']) && is_array($result['errors'])) {
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echo '<p class="feca-banner-note">' . htmlspecialchars(implode('; ', $result['errors'])) . '</p>';
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} else {
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echo '<p class="feca-banner-note">Generated: ' . (int) ($result['generated_count'] ?? 0)
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. ', Recipients: ' . (int) ($result['recipient_count'] ?? 0)
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. ', Skipped: ' . (int) ($result['skipped_count'] ?? 0) . '</p>';
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}
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echo '</div>';
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}
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echo '<form id="feca-download-pdf-form" class="feca-form feca-form-max-860" method="post" action="' . $action . '">';
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echo '<input type="hidden" name="action" value="feca_mailshots_download_pdf_ui">';
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echo $this->hiddenNonceField(self::NONCE_ACTION);
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echo '<input type="hidden" id="feca-download-format-shadow" name="download_format" value="">';
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echo '<div class="feca-control-row">';
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echo '<div class="feca-control feca-control-min-360">';
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echo '<label for="dp_mailshot_id"><strong>Mailshot</strong></label>';
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echo '<select id="dp_mailshot_id" name="mailshot_id">';
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foreach ($mailshots as $mailshot) {
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$id = (int) ($mailshot['id'] ?? 0);
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$purpose = trim((string) ($mailshot['Purpose'] ?? ''));
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if ($purpose === '') {
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$purpose = 'Mailshot #' . $id;
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}
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$selected = $id === $selectedMailshotId ? ' selected' : '';
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echo '<option value="' . $id . '"' . $selected . '>' . htmlspecialchars($purpose) . '</option>';
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}
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echo '</select></div></div>';
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echo '<p class="feca-button-row">';
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echo '<button id="feca-download-merged-btn" class="button button-primary" type="submit" name="download_format" value="merged" onclick="return confirm(\'Generate and download a single merged PDF?\');">Download Merged PDF</button> ';
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echo '<button id="feca-download-zip-btn" class="button" type="submit" name="download_format" value="zip" onclick="return confirm(\'Generate and download a ZIP of individual PDFs?\');">Download ZIP of PDFs</button>';
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echo '</p>';
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echo '<div id="feca-download-progress" class="feca-progress-box">';
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echo '<strong>Generating PDFs...</strong> Please wait. This can take a few seconds for larger mailshots.';
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echo '</div>';
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echo '</form>';
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echo '<script>';
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echo '(function(){';
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echo 'var actualForm=document.getElementById("feca-download-pdf-form");';
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echo 'if(!actualForm){return;}';
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echo 'var merged=document.getElementById("feca-download-merged-btn");';
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echo 'var zip=document.getElementById("feca-download-zip-btn");';
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echo 'var progress=document.getElementById("feca-download-progress");';
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echo 'var shadow=document.getElementById("feca-download-format-shadow");';
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echo 'var mailshotSelect=document.getElementById("dp_mailshot_id");';
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echo 'var selectedKey="fecaMailshotsSelectedMailshotId";';
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echo 'function hasOption(value){if(!mailshotSelect){return false;}for(var i=0;i<mailshotSelect.options.length;i++){if(String(mailshotSelect.options[i].value||"")===String(value||"")){return true;}}return false;}';
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echo 'function currentUrl(){return new URL(window.location.href);}';
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echo 'function updateUrl(value){try{var url=currentUrl();url.searchParams.set("page","' . self::PAGE_SLUG . '");if(value){url.searchParams.set("mailshot_id",String(value));}else{url.searchParams.delete("mailshot_id");}window.history.replaceState({},"",url.toString());}catch(_){}}';
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echo 'try{var url=currentUrl();var hasExplicit=url.searchParams.has("mailshot_id");var stored=String(sessionStorage.getItem(selectedKey)||"").trim();if(!hasExplicit&&stored&&hasOption(stored)&&mailshotSelect&&String(mailshotSelect.value||"")!==stored){url.searchParams.set("page","' . self::PAGE_SLUG . '");url.searchParams.set("mailshot_id",stored);window.location.replace(url.toString());return;}}catch(_){}';
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echo 'if(mailshotSelect){try{if(mailshotSelect.value){sessionStorage.setItem(selectedKey,String(mailshotSelect.value));}}catch(_){}updateUrl(String(mailshotSelect.value||""));mailshotSelect.addEventListener("change",function(){var value=String(mailshotSelect.value||"");try{if(value){sessionStorage.setItem(selectedKey,value);}else{sessionStorage.removeItem(selectedKey);}}catch(_){}updateUrl(value);});}';
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echo 'var clearUi=function(){if(progress){progress.style.display="none";}if(merged){merged.disabled=false;merged.classList.remove("disabled");}if(zip){zip.disabled=false;zip.classList.remove("disabled");}};';
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echo 'actualForm.addEventListener("submit",function(ev){';
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echo 'var submitter=ev&&ev.submitter?ev.submitter:null;';
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echo 'if(shadow&&submitter&&submitter.name==="download_format"){shadow.value=submitter.value||"";}';
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echo 'if(merged){merged.disabled=true;merged.classList.add("disabled");}';
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echo 'if(zip){zip.disabled=true;zip.classList.add("disabled");}';
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echo 'if(progress){progress.style.display="block";}';
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echo 'window.setTimeout(clearUi,45000);';
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echo '});';
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echo 'window.addEventListener("focus",clearUi);';
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echo 'window.addEventListener("pageshow",clearUi);';
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echo 'document.addEventListener("visibilitychange",function(){if(document.visibilityState==="visible"){clearUi();}});';
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echo '})();';
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echo '</script>';
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echo '</div>';
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}
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public function handleDownloadUi(): void
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{
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if (!$this->enforceMutationGuardOrJson(self::CAPABILITY, self::NONCE_ACTION)) {
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return;
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}
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$mailshotId = $this->requestInt('mailshot_id', 0);
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$format = $this->requestString('download_format', 'merged');
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if (!in_array($format, ['merged', 'zip'], true)) {
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$format = 'merged';
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}
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$this->maybeRaiseMemoryLimit($this->resolveDownloadMemoryLimitTarget());
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$downloadBaseName = $this->downloadBaseNameForMailshot($mailshotId);
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if ($format === 'zip') {
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try {
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$result = $this->runService()->generatePdfZipToTemp($mailshotId);
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} catch (\Throwable $e) {
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$this->wp->updateOption(self::RESULT_OPTION_KEY, ['ok' => false, 'errors' => ['ZIP generation failed: ' . $e->getMessage()]]);
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$this->redirectTo($this->wp->adminUrl('admin.php?page=' . self::PAGE_SLUG . '&mailshot_id=' . $mailshotId));
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return;
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}
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if (empty($result['ok'])) {
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$this->wp->updateOption(self::RESULT_OPTION_KEY, $result);
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$this->redirectTo($this->wp->adminUrl('admin.php?page=' . self::PAGE_SLUG . '&mailshot_id=' . $mailshotId));
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return;
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}
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$zipPath = (string) ($result['zip_path'] ?? '');
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if ($zipPath === '' || !is_file($zipPath)) {
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$this->wp->updateOption(self::RESULT_OPTION_KEY, ['ok' => false, 'errors' => ['ZIP generation failed: archive file not found.']]);
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$this->redirectTo($this->wp->adminUrl('admin.php?page=' . self::PAGE_SLUG . '&mailshot_id=' . $mailshotId));
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return;
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}
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try {
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$this->sendFileDownload($downloadBaseName . '_pdfs.zip', 'application/zip', $zipPath);
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} catch (\Throwable $e) {
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@unlink($zipPath);
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$this->wp->updateOption(self::RESULT_OPTION_KEY, ['ok' => false, 'errors' => ['ZIP download failed: ' . $e->getMessage()]]);
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$this->redirectTo($this->wp->adminUrl('admin.php?page=' . self::PAGE_SLUG . '&mailshot_id=' . $mailshotId));
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}
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return;
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}
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try {
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$result = $this->runService()->generatePdfBatch($mailshotId, true, false);
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} catch (\Throwable $e) {
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$this->wp->updateOption(self::RESULT_OPTION_KEY, ['ok' => false, 'errors' => ['Merged PDF generation failed: ' . $e->getMessage()]]);
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$this->redirectTo($this->wp->adminUrl('admin.php?page=' . self::PAGE_SLUG . '&mailshot_id=' . $mailshotId));
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return;
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}
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if (empty($result['ok'])) {
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$this->wp->updateOption(self::RESULT_OPTION_KEY, $result);
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$this->redirectTo($this->wp->adminUrl('admin.php?page=' . self::PAGE_SLUG . '&mailshot_id=' . $mailshotId));
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return;
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}
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$mergedPath = (string) ($result['merged_pdf_path'] ?? '');
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if ($mergedPath === '' || !is_file($mergedPath)) {
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$this->wp->updateOption(self::RESULT_OPTION_KEY, ['ok' => false, 'errors' => ['Merged PDF generation failed: output file not found.']]);
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$this->redirectTo($this->wp->adminUrl('admin.php?page=' . self::PAGE_SLUG . '&mailshot_id=' . $mailshotId));
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return;
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}
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try {
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$this->sendFileDownload($downloadBaseName . '_merged.pdf', 'application/pdf', $mergedPath);
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} catch (\Throwable $e) {
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@unlink($mergedPath);
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$this->wp->updateOption(self::RESULT_OPTION_KEY, ['ok' => false, 'errors' => ['Merged PDF download failed: ' . $e->getMessage()]]);
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$this->redirectTo($this->wp->adminUrl('admin.php?page=' . self::PAGE_SLUG . '&mailshot_id=' . $mailshotId));
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return;
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}
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}
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private function sendFileDownload(string $filename, string $contentType, string $path): void
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{
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if (headers_sent()) {
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throw new \RuntimeException('Cannot send download: headers already sent.');
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}
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$size = @filesize($path);
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if (!is_int($size) || $size <= 0) {
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throw new \RuntimeException('Cannot send download: file is missing or empty.');
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}
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header('Content-Type: ' . $contentType);
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header('Content-Disposition: attachment; filename="' . str_replace('"', '', $filename) . '"');
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header('Content-Length: ' . (string) $size);
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header('X-Content-Type-Options: nosniff');
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$in = @fopen($path, 'rb');
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if (!is_resource($in)) {
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throw new \RuntimeException('Cannot read download file.');
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}
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while (!feof($in)) {
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$chunk = fread($in, 8192);
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if ($chunk === false) {
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fclose($in);
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throw new \RuntimeException('Failed while reading download file.');
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}
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echo $chunk;
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}
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fclose($in);
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@unlink($path);
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exit;
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}
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private function runService(): MailshotRunService
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{
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return ($this->runServiceFactory)();
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}
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private function mailshotService(): MailshotService
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{
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return ($this->mailshotServiceFactory)();
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}
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private function downloadBaseNameForMailshot(int $mailshotId): string
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{
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try {
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foreach ($this->mailshotService()->list() as $mailshot) {
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if ((int) ($mailshot['id'] ?? 0) !== $mailshotId) {
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continue;
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}
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$purpose = trim((string) ($mailshot['Purpose'] ?? ''));
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if ($purpose !== '') {
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return $this->safeDownloadBaseName($purpose);
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}
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}
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} catch (\Throwable $e) {
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// Fall back to a stable id-based name if the purpose cannot be loaded.
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}
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return 'mailshot_' . max(0, $mailshotId);
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}
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private function safeDownloadBaseName(string $name): string
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{
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$name = trim($name);
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if ($name === '') {
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return 'mailshot';
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}
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if (function_exists('iconv')) {
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$ascii = @iconv('UTF-8', 'ASCII//TRANSLIT//IGNORE', $name);
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if (is_string($ascii) && trim($ascii) !== '') {
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$name = $ascii;
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}
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}
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$name = preg_replace('/[^A-Za-z0-9._-]+/', '_', $name) ?? '';
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$name = preg_replace('/_+/', '_', $name) ?? '';
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$name = trim($name, '._-');
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return $name !== '' ? $name : 'mailshot';
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}
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private function maybeRaiseMemoryLimit(string $target): void
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{
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if (!function_exists('ini_get') || !function_exists('ini_set')) {
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return;
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}
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$current = (string) ini_get('memory_limit');
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$currentBytes = $this->memoryLimitToBytes($current);
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$targetBytes = $this->memoryLimitToBytes($target);
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if ($currentBytes < 0 || $targetBytes <= 0) {
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return;
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}
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if ($currentBytes >= $targetBytes) {
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return;
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}
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$old = $current;
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@ini_set('memory_limit', $target);
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$new = (string) ini_get('memory_limit');
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if ($new === $old) {
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return;
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}
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}
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private function resolveDownloadMemoryLimitTarget(): string
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{
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$optionValue = $this->wp->getOption(self::DOWNLOAD_MEMORY_LIMIT_OPTION, '');
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if (is_string($optionValue)) {
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$v = trim($optionValue);
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if ($this->memoryLimitToBytes($v) > 0) {
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return $v;
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}
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}
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$envValue = getenv(self::DOWNLOAD_MEMORY_LIMIT_ENV);
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if (is_string($envValue)) {
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$v = trim($envValue);
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if ($this->memoryLimitToBytes($v) > 0) {
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return $v;
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}
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}
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return self::DEFAULT_DOWNLOAD_MEMORY_LIMIT;
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}
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private function memoryLimitToBytes(string $limit): int
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{
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$v = trim($limit);
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if ($v === '') {
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return 0;
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}
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if ($v === '-1') {
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return -1;
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}
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$unit = strtolower(substr($v, -1));
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if (ctype_alpha($unit)) {
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$num = (float) substr($v, 0, -1);
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switch ($unit) {
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case 'g':
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return (int) ($num * 1024 * 1024 * 1024);
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case 'm':
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return (int) ($num * 1024 * 1024);
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case 'k':
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return (int) ($num * 1024);
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default:
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return (int) $num;
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}
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}
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return (int) $v;
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}
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}
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