mail: initial mail service

This process provides an DBus interface for sending mails
to users. It has MIME support for plain text and html mails
and supports attachments.

The service gets the SMTP server's hostname, port and authentication
data from the configuration daemon.

1 files changed, 209 insertions, 0 deletions

diff --git a/src/mail/mail.vala b/src/mail/mail.vala
new file mode 100644
index 0000000..41153f8
--- /dev/null
+++ b/src/mail/mail.vala
@@ -0,0 +1,209 @@
+/* Copyright 2013, Sebastian Reichel <sre@ring0.de>
+ *
+ * Permission to use, copy, modify, and/or distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+[DBus (name = "io.mainframe.shopsystem.Mail")]
+public class MailImplementation {
+	private GMime.Message m;
+	private GMime.Part? main_text = null;
+	private GMime.Part? main_html = null;
+	private GMime.Part[] attachments;
+
+	private GMime.FilterCRLF filter;
+
+	private string[] recipients;
+	private string? reversepath;
+
+	public MailContact from { set {
+		string sender = value.name + " " + "<" + value.email + ">";
+		reversepath = value.email;
+		m.set_sender(sender);
+	}}
+
+	public string subject {
+		owned get {
+			var result = m.get_subject();
+			return (result == null) ? "" : result;
+		}
+		set {
+			m.set_subject(value);
+		}
+	}
+
+	public string message_id {
+		owned get {
+			var result = m.get_message_id();
+			return (result == null) ? "" : result;
+		}
+		set {
+			m.set_message_id(value);
+		}
+	}
+
+	public string reply_to {
+		owned get {
+			var result = m.get_reply_to();
+			return (result == null) ? "" : result;
+		}
+		set {
+			m.set_reply_to(value);
+		}
+	}
+
+	public MailDate date {
+		owned get {
+			MailDate result = {};
+			m.get_date(out result.date, out result.tz_offset);
+			return result;
+		}
+		set {
+			m.set_date((ulong) value.date, value.tz_offset);
+		}
+	}
+
+	public MailImplementation() {
+		m = new GMime.Message(true);
+		m.set_header("X-Mailer", "KtT Shopsystem");
+		attachments = new GMime.Part[0];
+		filter = new GMime.FilterCRLF(true, true);
+		recipients = new string[0];
+	}
+
+#if 0
+	public void set_from(MailContact contact) {
+		string sender = contact.name + " " + "<" + contact.email + ">";
+		m.set_sender(sender);
+	}
+
+	public void set_subject(string subject) {
+		m.set_subject(subject);
+	}
+
+	public void set_date(uint64 date, int tz_offset) {
+		m.set_date((ulong) date, tz_offset);
+	}
+#endif
+
+	public void add_recipient(MailContact contact, GMime.RecipientType type) {
+		m.add_recipient(type, contact.name, contact.email);
+		recipients += contact.email;
+	}
+
+	public void set_main_part(string text, MessageType type) {
+		GMime.DataWrapper content = new GMime.DataWrapper.with_stream(
+			new GMime.StreamMem.with_buffer(text.data),
+			GMime.ContentEncoding.DEFAULT);
+
+		GMime.Part? part = new GMime.Part();
+		part.set_content_object(content);
+
+		switch(type) {
+			case MessageType.HTML:
+				part.set_content_type(new GMime.ContentType.from_string("text/html; charset=utf-8"));
+				part.set_content_encoding(part.get_best_content_encoding(GMime.EncodingConstraint.7BIT));
+				main_html = part;
+				break;
+			case MessageType.PLAIN:
+			default:
+				part.set_content_type(new GMime.ContentType.from_string("text/plain; charset=utf-8; format=flowed"));
+				part.set_content_encoding(part.get_best_content_encoding(GMime.EncodingConstraint.7BIT));
+				main_text = part;
+				break;
+		}
+	}
+
+	public void add_attachment(string filename, string content_type, uint8[] data) {
+		GMime.Part part = new GMime.Part();
+
+		GMime.DataWrapper content = new GMime.DataWrapper.with_stream(
+			new GMime.StreamMem.with_buffer(data),
+			GMime.ContentEncoding.BINARY);
+
+		/* configure part */
+		part.set_disposition("attachment");
+		part.set_filename(filename);
+		part.set_content_type(new GMime.ContentType.from_string(content_type));
+		part.set_content_object(content);
+		part.set_content_encoding(part.get_best_content_encoding(GMime.EncodingConstraint.7BIT));
+
+		attachments += part;
+	}
+
+	private GMime.Object? generate_main() {
+		if(main_text != null && main_html != null) {
+			var result = new GMime.Multipart.with_subtype("alternative");
+			result.add(main_text);
+			result.add(main_html);
+			return result;
+		} else if(main_text != null) {
+			return main_text;
+		} else if(main_html != null) {
+			return main_html;
+		}
+
+		return null;
+	}
+
+	private GMime.Object? generate_attachments() {
+		if(attachments.length == 1) {
+			return attachments[0];
+		} else if(attachments.length > 1) {
+			var multipart = new GMime.Multipart.with_subtype("mixed");
+			foreach(var attachment in attachments)
+				multipart.add(attachment);
+			return multipart;
+		}
+
+		return null;
+	}
+
+	private void update_mime_part() {
+		GMime.Object? main = generate_main();
+		GMime.Object? attachments = generate_attachments();
+		GMime.Object? mime_message = null;
+
+		if(main != null && attachments != null) {
+			var multipart = new GMime.Multipart.with_subtype("mixed");
+			multipart.add(main);
+			multipart.add(attachments);
+			mime_message = multipart;
+		} else if(main != null) {
+			mime_message = main;
+		} else if(attachments != null) {
+			mime_message = attachments;
+		}
+
+		m.set_mime_part(mime_message);
+	}
+
+	[DBus (visible = false)]
+	public string generate() {
+		update_mime_part();
+		string result = m.to_string();
+		uint8[] crlfdata;
+		size_t prespace;
+		filter.filter(result.data, 0, out crlfdata, out prespace);
+		return (string) crlfdata;
+	}
+
+	[DBus (visible = false)]
+	public unowned string[] get_recipients() {
+		return recipients;
+	}
+
+	[DBus (visible = false)]
+	public string get_reverse_path() {
+		return reversepath;
+	}
+}