Add addBodyButton to add a single button to email templates

Signed-off-by: Morris Jobke <hey@morrisjobke.de>

lib/private/Mail/EMailTemplate.php

@@ -225,6 +225,46 @@ EOF;
 	</tr>
 	</tbody>
 </table>
+EOF;
+
+	protected $button = <<<EOF
+<table class="spacer" style="border-collapse:collapse;border-spacing:0;padding:0;text-align:left;vertical-align:top;width:100%%">
+	<tbody>
+	<tr style="padding:0;text-align:left;vertical-align:top">
+		<td height="50px" style="-moz-hyphens:auto;-webkit-hyphens:auto;Margin:0;border-collapse:collapse!important;color:#0a0a0a;font-family:Lucida Grande,Geneva,Verdana,sans-serif;font-size:50px;font-weight:400;hyphens:auto;line-height:50px;margin:0;mso-line-height-rule:exactly;padding:0;text-align:left;vertical-align:top;word-wrap:break-word">&#xA0;</td>
+	</tr>
+	</tbody>
+</table>
+<table align="center" class="row btn-group" style="border-collapse:collapse;border-spacing:0;display:table;padding:0;position:relative;text-align:left;vertical-align:top;width:100%%">
+	<tbody>
+	<tr style="padding:0;text-align:left;vertical-align:top">
+		<th class="small-12 large-12 columns first last" style="Margin:0 auto;color:#0a0a0a;font-family:Lucida Grande,Geneva,Verdana,sans-serif;font-size:16px;font-weight:400;line-height:1.3;margin:0 auto;padding:0;padding-bottom:30px;padding-left:30px;padding-right:30px;text-align:left;width:550px">
+			<table style="border-collapse:collapse;border-spacing:0;padding:0;text-align:left;vertical-align:top;width:100%%">
+				<tr style="padding:0;text-align:left;vertical-align:top">
+					<th style="Margin:0;color:#0a0a0a;font-family:Lucida Grande,Geneva,Verdana,sans-serif;font-size:16px;font-weight:400;line-height:1.3;margin:0;padding:0;text-align:left">
+						<center data-parsed="" style="min-width:490px;width:100%%">
+							<table class="button btn default primary float-center" style="Margin:0;border-collapse:collapse;border-spacing:0;display:inline-block;float:none;margin:0;max-height:40px;padding:0;text-align:center;vertical-align:top;width:auto">
+								<tr style="padding:0;text-align:left;vertical-align:top">
+									<td style="-moz-hyphens:auto;-webkit-hyphens:auto;Margin:0;border-collapse:collapse!important;color:#0a0a0a;font-family:Lucida Grande,Geneva,Verdana,sans-serif;font-size:16px;font-weight:400;hyphens:auto;line-height:1.3;margin:0;padding:0;text-align:left;vertical-align:top;word-wrap:break-word">
+										<table style="border-collapse:collapse;border-spacing:0;padding:0;text-align:left;vertical-align:top;width:100%%">
+											<tr style="padding:0;text-align:left;vertical-align:top">
+												<td style="-moz-hyphens:auto;-webkit-hyphens:auto;Margin:0;background:%s;border:0 solid %s;border-collapse:collapse!important;color:#fefefe;font-family:Lucida Grande,Geneva,Verdana,sans-serif;font-size:16px;font-weight:400;hyphens:auto;line-height:1.3;margin:0;padding:0;text-align:left;vertical-align:top;word-wrap:break-word">
+													<a href="%s" style="Margin:0;border:0 solid %s;border-radius:2px;color:#fefefe;display:inline-block;font-family:Lucida Grande,Geneva,Verdana,sans-serif;font-size:16px;font-weight:regular;line-height:1.3;margin:0;padding:10px 25px 10px 25px;text-align:left;text-decoration:none">%s</a>
+												</td>
+											</tr>
+										</table>
+									</td>
+								</tr>
+							</table>
+						</center>
+					</th>
+					<th class="expander" style="Margin:0;color:#0a0a0a;font-family:Lucida Grande,Geneva,Verdana,sans-serif;font-size:16px;font-weight:400;line-height:1.3;margin:0;padding:0!important;text-align:left;visibility:hidden;width:0"></th>
+				</tr>
+			</table>
+		</th>
+	</tr>
+	</tbody>
+</table>
 EOF;
 
 	protected $bodyEnd = <<<EOF
@@ -366,6 +406,30 @@ EOF;
 
 	}
 
+	/**
+	 * Adds a button to the body of the email
+	 *
+	 * @param string $text Text of button
+	 * @param string $url URL of button
+	 *
+	 * @since 12.0.0
+	 */
+	public function addBodyButton($text, $url) {
+		if ($this->footerAdded) {
+			return;
+		}
+
+		if (!$this->bodyOpened) {
+			$this->htmlBody .= $this->bodyBegin;
+			$this->bodyOpened = true;
+		}
+
+		$color = $this->themingDefaults->getColorPrimary();
+		$this->htmlBody .= vsprintf($this->button, [$color, $color, $url, $color, htmlspecialchars($text)]);
+		$this->plainBody .= $text . ': ' . $url . PHP_EOL;
+
+	}
+
 	/**
 	 * Adds a logo and a text to the footer. <br> in the text will be replaced by new lines in the plain text email
 	 *

lib/public/Mail/IEMailTemplate.php

@@ -92,6 +92,16 @@ interface IEMailTemplate {
 	 */
 	public function addBodyButtonGroup($textLeft, $urlLeft, $textRight, $urlRight, $plainTextLeft = '', $plainTextRight = '');
 
+	/**
+	 * Adds a button to the body of the email
+	 *
+	 * @param string $text Text of button
+	 * @param string $url URL of button
+	 *
+	 * @since 12.0.0
+	 */
+	public function addBodyButton($text, $url);
+
 	/**
 	 * Adds a logo and a text to the footer. <br> in the text will be replaced by new lines in the plain text email
 	 *

tests/data/emails/new-account-email-single-button.html

@@ -0,0 +1,174 @@
+<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
+<html xmlns="http://www.w3.org/1999/xhtml" lang="en" xml:lang="en" style="-webkit-font-smoothing:antialiased;background:#f3f3f3!important">
+<head>
+	<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
+	<meta name="viewport" content="width=device-width">
+	<title></title>
+	<style type="text/css">@media only screen{html{min-height:100%;background:#F5F5F5}}@media only screen and (max-width:610px){table.body img{width:auto;height:auto}table.body center{min-width:0!important}table.body .container{width:95%!important}table.body .columns{height:auto!important;-moz-box-sizing:border-box;-webkit-box-sizing:border-box;box-sizing:border-box;padding-left:30px!important;padding-right:30px!important}th.small-12{display:inline-block!important;width:100%!important}table.menu{width:100%!important}table.menu td,table.menu th{width:auto!important;display:inline-block!important}table.menu.vertical td,table.menu.vertical th{display:block!important}table.menu[align=center]{width:auto!important}}</style>
+</head>
+<body style="-moz-box-sizing:border-box;-ms-text-size-adjust:100%;-webkit-box-sizing:border-box;-webkit-font-smoothing:antialiased;-webkit-text-size-adjust:100%;Margin:0;background:#f3f3f3!important;box-sizing:border-box;color:#0a0a0a;font-family:Lucida Grande,Geneva,Verdana,sans-serif;font-size:16px;font-weight:400;line-height:1.3;margin:0;min-width:100%;padding:0;text-align:left;width:100%!important">
+	<span class="preheader" style="color:#F5F5F5;display:none!important;font-size:1px;line-height:1px;max-height:0;max-width:0;mso-hide:all!important;opacity:0;overflow:hidden;visibility:hidden">
+	</span>
+	<table class="body" style="-webkit-font-smoothing:antialiased;Margin:0;background:#f3f3f3!important;border-collapse:collapse;border-spacing:0;color:#0a0a0a;font-family:Lucida Grande,Geneva,Verdana,sans-serif;font-size:16px;font-weight:400;height:100%;line-height:1.3;margin:0;padding:0;text-align:left;vertical-align:top;width:100%">
+		<tr style="padding:0;text-align:left;vertical-align:top">
+			<td class="center" align="center" valign="top" style="-moz-hyphens:auto;-webkit-hyphens:auto;Margin:0;border-collapse:collapse!important;color:#0a0a0a;font-family:Lucida Grande,Geneva,Verdana,sans-serif;font-size:16px;font-weight:400;hyphens:auto;line-height:1.3;margin:0;padding:0;text-align:left;vertical-align:top;word-wrap:break-word">
+				<center data-parsed="" style="min-width:580px;width:100%"><table align="center" class="wrapper header float-center" style="Margin:0 auto;background:#8a8a8a;background-color:#0082c9;border-collapse:collapse;border-spacing:0;float:none;margin:0 auto;padding:0;text-align:center;vertical-align:top;width:100%">
+	<tr style="padding:0;text-align:left;vertical-align:top">
+		<td class="wrapper-inner" style="-moz-hyphens:auto;-webkit-hyphens:auto;Margin:0;border-collapse:collapse!important;color:#0a0a0a;font-family:Lucida Grande,Geneva,Verdana,sans-serif;font-size:16px;font-weight:400;hyphens:auto;line-height:1.3;margin:0;padding:20px;text-align:left;vertical-align:top;word-wrap:break-word">
+			<table align="center" class="container" style="Margin:0 auto;background:0 0;border-collapse:collapse;border-spacing:0;margin:0 auto;padding:0;text-align:inherit;vertical-align:top;width:580px">
+				<tbody>
+				<tr style="padding:0;text-align:left;vertical-align:top">
+					<td style="-moz-hyphens:auto;-webkit-hyphens:auto;Margin:0;border-collapse:collapse!important;color:#0a0a0a;font-family:Lucida Grande,Geneva,Verdana,sans-serif;font-size:16px;font-weight:400;hyphens:auto;line-height:1.3;margin:0;padding:0;text-align:left;vertical-align:top;word-wrap:break-word">
+						<table class="row collapse" style="border-collapse:collapse;border-spacing:0;display:table;padding:0;position:relative;text-align:left;vertical-align:top;width:100%">
+							<tbody>
+							<tr style="padding:0;text-align:left;vertical-align:top">
+								<center data-parsed="" style="min-width:580px;width:100%">
+									<img class="logo float-center" src="https://example.org/img/logo-mail-header.png" alt="logo" align="center" style="-ms-interpolation-mode:bicubic;Margin:0 auto;clear:both;display:block;float:none;margin:0 auto;max-height:100%;max-width:100px;outline:0;text-align:center;text-decoration:none;width:auto">
+								</center>
+							</tr>
+							</tbody>
+						</table>
+					</td>
+				</tr>
+				</tbody>
+			</table>
+		</td>
+	</tr>
+</table>
+<table class="spacer float-center" style="Margin:0 auto;border-collapse:collapse;border-spacing:0;float:none;margin:0 auto;padding:0;text-align:center;vertical-align:top;width:100%">
+	<tbody>
+	<tr style="padding:0;text-align:left;vertical-align:top">
+		<td height="80px" style="-moz-hyphens:auto;-webkit-hyphens:auto;Margin:0;border-collapse:collapse!important;color:#0a0a0a;font-family:Lucida Grande,Geneva,Verdana,sans-serif;font-size:80px;font-weight:400;hyphens:auto;line-height:80px;margin:0;mso-line-height-rule:exactly;padding:0;text-align:left;vertical-align:top;word-wrap:break-word">&#xA0;</td>
+	</tr>
+	</tbody>
+</table><table align="center" class="container main-heading float-center" style="Margin:0 auto;background:0 0!important;border-collapse:collapse;border-spacing:0;float:none;margin:0 auto;padding:0;text-align:center;vertical-align:top;width:580px">
+	<tbody>
+	<tr style="padding:0;text-align:left;vertical-align:top">
+		<td style="-moz-hyphens:auto;-webkit-hyphens:auto;Margin:0;border-collapse:collapse!important;color:#0a0a0a;font-family:Lucida Grande,Geneva,Verdana,sans-serif;font-size:16px;font-weight:400;hyphens:auto;line-height:1.3;margin:0;padding:0;text-align:left;vertical-align:top;word-wrap:break-word">
+			<h1 class="text-center" style="Margin:0;Margin-bottom:10px;color:inherit;font-family:Lucida Grande,Geneva,Verdana,sans-serif;font-size:24px;font-weight:400;line-height:1.3;margin:0;margin-bottom:10px;padding:0;text-align:center;word-wrap:normal">Welcome aboard</h1>
+		</td>
+	</tr>
+	</tbody>
+</table>
+<table class="spacer float-center" style="Margin:0 auto;border-collapse:collapse;border-spacing:0;float:none;margin:0 auto;padding:0;text-align:center;vertical-align:top;width:100%">
+	<tbody>
+	<tr style="padding:0;text-align:left;vertical-align:top">
+		<td height="40px" style="-moz-hyphens:auto;-webkit-hyphens:auto;Margin:0;border-collapse:collapse!important;color:#0a0a0a;font-family:Lucida Grande,Geneva,Verdana,sans-serif;font-size:40px;font-weight:400;hyphens:auto;line-height:40px;margin:0;mso-line-height-rule:exactly;padding:0;text-align:left;vertical-align:top;word-wrap:break-word">&#xA0;</td>
+	</tr>
+	</tbody>
+</table><table align="center" class="wrapper content float-center" style="Margin:0 auto;border-collapse:collapse;border-spacing:0;float:none;margin:0 auto;padding:0;text-align:center;vertical-align:top;width:100%">
+	<tr style="padding:0;text-align:left;vertical-align:top">
+		<td class="wrapper-inner" style="-moz-hyphens:auto;-webkit-hyphens:auto;Margin:0;border-collapse:collapse!important;color:#0a0a0a;font-family:Lucida Grande,Geneva,Verdana,sans-serif;font-size:16px;font-weight:400;hyphens:auto;line-height:1.3;margin:0;padding:0;text-align:left;vertical-align:top;word-wrap:break-word">
+			<table align="center" class="container has-shadow" style="Margin:0 auto;background:#fefefe;border-collapse:collapse;border-spacing:0;box-shadow:0 1px 2px 0 rgba(0,0,0,.2),0 1px 3px 0 rgba(0,0,0,.1);margin:0 auto;padding:0;text-align:inherit;vertical-align:top;width:580px">
+				<tbody>
+				<tr style="padding:0;text-align:left;vertical-align:top">
+					<td style="-moz-hyphens:auto;-webkit-hyphens:auto;Margin:0;border-collapse:collapse!important;color:#0a0a0a;font-family:Lucida Grande,Geneva,Verdana,sans-serif;font-size:16px;font-weight:400;hyphens:auto;line-height:1.3;margin:0;padding:0;text-align:left;vertical-align:top;word-wrap:break-word">
+						<table class="spacer" style="border-collapse:collapse;border-spacing:0;padding:0;text-align:left;vertical-align:top;width:100%">
+							<tbody>
+							<tr style="padding:0;text-align:left;vertical-align:top">
+								<td height="60px" style="-moz-hyphens:auto;-webkit-hyphens:auto;Margin:0;border-collapse:collapse!important;color:#0a0a0a;font-family:Lucida Grande,Geneva,Verdana,sans-serif;font-size:60px;font-weight:400;hyphens:auto;line-height:60px;margin:0;mso-line-height-rule:exactly;padding:0;text-align:left;vertical-align:top;word-wrap:break-word">&#xA0;</td>
+							</tr>
+							</tbody>
+						</table><table class="row description" style="border-collapse:collapse;border-spacing:0;display:table;padding:0;position:relative;text-align:left;vertical-align:top;width:100%">
+	<tbody>
+	<tr style="padding:0;text-align:left;vertical-align:top">
+		<th class="small-12 large-12 columns first last" style="Margin:0 auto;color:#0a0a0a;font-family:Lucida Grande,Geneva,Verdana,sans-serif;font-size:16px;font-weight:400;line-height:1.3;margin:0 auto;padding:0;padding-bottom:30px;padding-left:30px;padding-right:30px;text-align:left;width:550px">
+			<table style="border-collapse:collapse;border-spacing:0;padding:0;text-align:left;vertical-align:top;width:100%">
+				<tr style="padding:0;text-align:left;vertical-align:top">
+					<th style="Margin:0;color:#0a0a0a;font-family:Lucida Grande,Geneva,Verdana,sans-serif;font-size:16px;font-weight:400;line-height:1.3;margin:0;padding:0;text-align:left">
+						<p class="text-left" style="Margin:0;Margin-bottom:10px;color:#777;font-family:Lucida Grande,Geneva,Verdana,sans-serif;font-size:16px;font-weight:400;line-height:1.3;margin:0;margin-bottom:10px;padding:0;text-align:left">You have now an Nextcloud account, you can add, protect, and share your data.</p>
+					</th>
+					<th class="expander" style="Margin:0;color:#0a0a0a;font-family:Lucida Grande,Geneva,Verdana,sans-serif;font-size:16px;font-weight:400;line-height:1.3;margin:0;padding:0!important;text-align:left;visibility:hidden;width:0"></th>
+				</tr>
+			</table>
+		</th>
+	</tr>
+	</tbody>
+</table><table class="row description" style="border-collapse:collapse;border-spacing:0;display:table;padding:0;position:relative;text-align:left;vertical-align:top;width:100%">
+	<tbody>
+	<tr style="padding:0;text-align:left;vertical-align:top">
+		<th class="small-12 large-12 columns first last" style="Margin:0 auto;color:#0a0a0a;font-family:Lucida Grande,Geneva,Verdana,sans-serif;font-size:16px;font-weight:400;line-height:1.3;margin:0 auto;padding:0;padding-bottom:30px;padding-left:30px;padding-right:30px;text-align:left;width:550px">
+			<table style="border-collapse:collapse;border-spacing:0;padding:0;text-align:left;vertical-align:top;width:100%">
+				<tr style="padding:0;text-align:left;vertical-align:top">
+					<th style="Margin:0;color:#0a0a0a;font-family:Lucida Grande,Geneva,Verdana,sans-serif;font-size:16px;font-weight:400;line-height:1.3;margin:0;padding:0;text-align:left">
+						<p class="text-left" style="Margin:0;Margin-bottom:10px;color:#777;font-family:Lucida Grande,Geneva,Verdana,sans-serif;font-size:16px;font-weight:400;line-height:1.3;margin:0;margin-bottom:10px;padding:0;text-align:left">Your username is: abc</p>
+					</th>
+					<th class="expander" style="Margin:0;color:#0a0a0a;font-family:Lucida Grande,Geneva,Verdana,sans-serif;font-size:16px;font-weight:400;line-height:1.3;margin:0;padding:0!important;text-align:left;visibility:hidden;width:0"></th>
+				</tr>
+			</table>
+		</th>
+	</tr>
+	</tbody>
+</table><table class="spacer" style="border-collapse:collapse;border-spacing:0;padding:0;text-align:left;vertical-align:top;width:100%">
+	<tbody>
+	<tr style="padding:0;text-align:left;vertical-align:top">
+		<td height="50px" style="-moz-hyphens:auto;-webkit-hyphens:auto;Margin:0;border-collapse:collapse!important;color:#0a0a0a;font-family:Lucida Grande,Geneva,Verdana,sans-serif;font-size:50px;font-weight:400;hyphens:auto;line-height:50px;margin:0;mso-line-height-rule:exactly;padding:0;text-align:left;vertical-align:top;word-wrap:break-word">&#xA0;</td>
+	</tr>
+	</tbody>
+</table>
+<table align="center" class="row btn-group" style="border-collapse:collapse;border-spacing:0;display:table;padding:0;position:relative;text-align:left;vertical-align:top;width:100%">
+	<tbody>
+	<tr style="padding:0;text-align:left;vertical-align:top">
+		<th class="small-12 large-12 columns first last" style="Margin:0 auto;color:#0a0a0a;font-family:Lucida Grande,Geneva,Verdana,sans-serif;font-size:16px;font-weight:400;line-height:1.3;margin:0 auto;padding:0;padding-bottom:30px;padding-left:30px;padding-right:30px;text-align:left;width:550px">
+			<table style="border-collapse:collapse;border-spacing:0;padding:0;text-align:left;vertical-align:top;width:100%">
+				<tr style="padding:0;text-align:left;vertical-align:top">
+					<th style="Margin:0;color:#0a0a0a;font-family:Lucida Grande,Geneva,Verdana,sans-serif;font-size:16px;font-weight:400;line-height:1.3;margin:0;padding:0;text-align:left">
+						<center data-parsed="" style="min-width:490px;width:100%">
+							<table class="button btn default primary float-center" style="Margin:0;border-collapse:collapse;border-spacing:0;display:inline-block;float:none;margin:0;max-height:40px;padding:0;text-align:center;vertical-align:top;width:auto">
+								<tr style="padding:0;text-align:left;vertical-align:top">
+									<td style="-moz-hyphens:auto;-webkit-hyphens:auto;Margin:0;border-collapse:collapse!important;color:#0a0a0a;font-family:Lucida Grande,Geneva,Verdana,sans-serif;font-size:16px;font-weight:400;hyphens:auto;line-height:1.3;margin:0;padding:0;text-align:left;vertical-align:top;word-wrap:break-word">
+										<table style="border-collapse:collapse;border-spacing:0;padding:0;text-align:left;vertical-align:top;width:100%">
+											<tr style="padding:0;text-align:left;vertical-align:top">
+												<td style="-moz-hyphens:auto;-webkit-hyphens:auto;Margin:0;background:#0082c9;border:0 solid #0082c9;border-collapse:collapse!important;color:#fefefe;font-family:Lucida Grande,Geneva,Verdana,sans-serif;font-size:16px;font-weight:400;hyphens:auto;line-height:1.3;margin:0;padding:0;text-align:left;vertical-align:top;word-wrap:break-word">
+													<a href="https://example.org/resetPassword/123" style="Margin:0;border:0 solid #0082c9;border-radius:2px;color:#fefefe;display:inline-block;font-family:Lucida Grande,Geneva,Verdana,sans-serif;font-size:16px;font-weight:regular;line-height:1.3;margin:0;padding:10px 25px 10px 25px;text-align:left;text-decoration:none">Set your password</a>
+												</td>
+											</tr>
+										</table>
+									</td>
+								</tr>
+							</table>
+						</center>
+					</th>
+					<th class="expander" style="Margin:0;color:#0a0a0a;font-family:Lucida Grande,Geneva,Verdana,sans-serif;font-size:16px;font-weight:400;line-height:1.3;margin:0;padding:0!important;text-align:left;visibility:hidden;width:0"></th>
+				</tr>
+			</table>
+		</th>
+	</tr>
+	</tbody>
+</table>
+					</td>
+				</tr>
+				</tbody>
+			</table>
+		</td>
+	</tr>
+</table><table class="spacer float-center" style="Margin:0 auto;border-collapse:collapse;border-spacing:0;float:none;margin:0 auto;padding:0;text-align:center;vertical-align:top;width:100%">
+	<tbody>
+	<tr style="padding:0;text-align:left;vertical-align:top">
+		<td height="60px" style="-moz-hyphens:auto;-webkit-hyphens:auto;Margin:0;border-collapse:collapse!important;color:#0a0a0a;font-family:Lucida Grande,Geneva,Verdana,sans-serif;font-size:60px;font-weight:400;hyphens:auto;line-height:60px;margin:0;mso-line-height-rule:exactly;padding:0;text-align:left;vertical-align:top;word-wrap:break-word">&#xA0;</td>
+	</tr>
+	</tbody>
+</table>
+<table align="center" class="wrapper footer float-center" style="Margin:0 auto;border-collapse:collapse;border-spacing:0;float:none;margin:0 auto;padding:0;text-align:center;vertical-align:top;width:100%">
+	<tr style="padding:0;text-align:left;vertical-align:top">
+		<td class="wrapper-inner" style="-moz-hyphens:auto;-webkit-hyphens:auto;Margin:0;border-collapse:collapse!important;color:#0a0a0a;font-family:Lucida Grande,Geneva,Verdana,sans-serif;font-size:16px;font-weight:400;hyphens:auto;line-height:1.3;margin:0;padding:0;text-align:left;vertical-align:top;word-wrap:break-word">
+			<center data-parsed="" style="min-width:580px;width:100%">
+				<table class="spacer float-center" style="Margin:0 auto;border-collapse:collapse;border-spacing:0;float:none;margin:0 auto;padding:0;text-align:center;vertical-align:top;width:100%">
+					<tbody>
+					<tr style="padding:0;text-align:left;vertical-align:top">
+						<td height="15px" style="-moz-hyphens:auto;-webkit-hyphens:auto;Margin:0;border-collapse:collapse!important;color:#0a0a0a;font-family:Lucida Grande,Geneva,Verdana,sans-serif;font-size:15px;font-weight:400;hyphens:auto;line-height:15px;margin:0;mso-line-height-rule:exactly;padding:0;text-align:left;vertical-align:top;word-wrap:break-word">&#xA0;</td>
+					</tr>
+					</tbody>
+				</table>
+				<p class="text-center float-center" align="center" style="Margin:0;Margin-bottom:10px;color:#C8C8C8;font-family:Lucida Grande,Geneva,Verdana,sans-serif;font-size:12px;font-weight:400;line-height:16px;margin:0;margin-bottom:10px;padding:0;text-align:center">TestCloud - A safe home for your data<br></p>
+			</center>
+		</td>
+	</tr>
+</table>					</center>
+				</td>
+			</tr>
+		</table>
+		<!-- prevent Gmail on iOS font size manipulation -->
+		<div style="display:none;white-space:nowrap;font:15px courier;line-height:0">&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;</div>
+	</body>
+</html>

tests/data/emails/new-account-email-single-button.txt

@@ -0,0 +1,9 @@
+Welcome aboard
+
+You have now an Nextcloud account, you can add, protect, and share your data.
+
+Your username is: abc
+
+Set your password: https://example.org/resetPassword/123
+--
+TestCloud - A safe home for your data

tests/lib/Mail/EMailTemplateTest.php

@@ -125,6 +125,44 @@ class EMailTemplateTest extends TestCase {
 		$this->assertSame($expectedTXT, $this->emailTemplate->renderText());
 	}
 
+	public function testEMailTemplateSingleButton() {
+		$this->defaults
+			->expects($this->any())
+			->method('getColorPrimary')
+			->willReturn('#0082c9');
+		$this->defaults
+			->expects($this->any())
+			->method('getName')
+			->willReturn('TestCloud');
+		$this->defaults
+			->expects($this->any())
+			->method('getSlogan')
+			->willReturn('A safe home for your data');
+		$this->defaults
+			->expects($this->any())
+			->method('getLogo')
+			->willReturn('/img/logo-mail-header.png');
+		$this->urlGenerator
+			->expects($this->once())
+			->method('getAbsoluteURL')
+			->with('/img/logo-mail-header.png')
+			->willReturn('https://example.org/img/logo-mail-header.png');
+
+		$this->emailTemplate->addHeader();
+		$this->emailTemplate->addHeading('Welcome aboard');
+		$this->emailTemplate->addBodyText('You have now an Nextcloud account, you can add, protect, and share your data.');
+		$this->emailTemplate->addBodyText('Your username is: abc');
+		$this->emailTemplate->addBodyButton(
+			'Set your password', 'https://example.org/resetPassword/123'
+		);
+		$this->emailTemplate->addFooter();
+
+		$expectedHTML = file_get_contents(\OC::$SERVERROOT . '/tests/data/emails/new-account-email-single-button.html');
+		$this->assertSame($expectedHTML, $this->emailTemplate->renderHTML());
+		$expectedTXT = file_get_contents(\OC::$SERVERROOT . '/tests/data/emails/new-account-email-single-button.txt');
+		$this->assertSame($expectedTXT, $this->emailTemplate->renderText());
+	}
+
 
 
 	public function testEMailTemplateAlternativePlainTexts() {