# HG changeset patch
# User František Kučera <franta-hg@frantovo.cz>
# Date 1611611017 -3600
# Node ID 356d0b024abf3760e622145e122d3479fe318191
# Parent  ea26b3359fed5f3077ecd23823176aa5fcf4e791
basic MIME header support

diff -r ea26b3359fed -r 356d0b024abf src/XMLDocumentConstructor.h
--- a/src/XMLDocumentConstructor.h	Sat Jan 16 16:36:39 2021 +0100
+++ b/src/XMLDocumentConstructor.h	Mon Jan 25 22:43:37 2021 +0100
@@ -35,30 +35,20 @@
 	xmlpp::DomParser* parser = nullptr;
 	XMLNameCodec nameCodec;
 
-	enum class Mode {
-		ROOT,
-		SEQUENCE,
-		MAPPING,
-		MAP_KEY
-	};
-
-	std::string rootName = "mime";
-	xmlpp::Element* current;
-	std::vector<Mode> mode;
+	std::string rootName = "mime-message";
 
-	/**
-	 * Both MIME and XML strings are in UTF-8.
-	const char* y2x(mime_char_t* value) {
-		return value ? (const char*) value : "";
-	}
-
-	const Glib::ustring y2xname(mime_char_t* value) {
-		return nameCodec.encode(y2x(value));
-	}
-	 */
-
-	xmlpp::Element* parentOrSelf(xmlpp::Element* current) {
-		return current->get_parent() == nullptr ? current : current->get_parent();
+	std::string format(std::shared_ptr<vmime::datetime> value) {
+		std::stringstream timestamp;
+		int tz = value->getZone();
+		timestamp << value->getYear() << "-";
+		timestamp << std::setw(2) << std::setfill('0') << value->getMonth() << "-";
+		timestamp << std::setw(2) << std::setfill('0') << value->getDay() << "T";
+		timestamp << std::setw(2) << std::setfill('0') << value->getHour() << ":";
+		timestamp << std::setw(2) << std::setfill('0') << value->getMinute() << ":";
+		timestamp << std::setw(2) << std::setfill('0') << value->getSecond() << (tz >= 0 ? "+" : "-");
+		timestamp << std::setw(2) << std::setfill('0') << std::abs(tz / 60) << ":";
+		timestamp << std::setw(2) << std::setfill('0') << std::abs(tz % 60);
+		return timestamp.str();
 	}
 
 public:
@@ -75,7 +65,101 @@
 	}
 
 	void process() {
-		current = parser->get_document()->create_root_node(rootName);
+		vmime::utility::inputStreamAdapter is(*input);
+		vmime::string data;
+		vmime::utility::outputStreamStringAdapter os(data);
+		vmime::utility::bufferedStreamCopy(is, os);
+
+		vmime::message m;
+		m.parse(data);
+
+		// vmime::shared_ptr<vmime::utility::inputStreamAdapter> is = vmime::make_shared<vmime::utility::inputStreamAdapter>(*input);
+		// m.parse(is, 0);
+
+		vmime::charset ch(vmime::charsets::UTF_8);
+
+		//std::cerr << "Subject:" << m.getHeader()->Subject()->getValue<vmime::text>()->getConvertedText(ch) << std::endl;
+
+		xmlpp::Element* root = parser->get_document()->create_root_node(rootName);
+
+		xmlpp::Element* headers = root->add_child("headers");
+
+		for (std::shared_ptr<vmime::headerField> mimeField : m.getHeader()->getFieldList()) {
+			// TODO: Are names always ASCII and subset of UTF-8?
+			// TODO: Convert header names to lower case? (they should be case insensitive)
+			xmlpp::Element* field = headers->add_child(nameCodec.encode(mimeField->getName()));
+
+
+			if (auto value = mimeField->getValue<vmime::text>()) {
+				field->add_child_text(value->getConvertedText(ch));
+			} else if (auto value = mimeField->getValue<vmime::mailbox>()) {
+				std::string name = value->getName().getConvertedText(ch);
+				std::string email = value->getEmail().toString();
+				if (name.size()) field->set_attribute("name", name);
+				if (email.size()) field->add_child_text(email);
+			} else if (auto value = mimeField->getValue<vmime::addressList>()) {
+				for (auto address : value->getAddressList()) {
+					xmlpp::Element* addressField = field->add_child("address");
+					if (std::shared_ptr<vmime::mailbox> mailbox = std::dynamic_pointer_cast<vmime::mailbox> (address)) {
+						std::string name = mailbox->getName().getConvertedText(ch);
+						std::string email = mailbox->getEmail().toString();
+						if (name.size()) addressField->set_attribute("name", name);
+						if (email.size()) addressField->add_child_text(email);
+					} else if (std::shared_ptr<vmime::mailboxGroup> mailbox = std::dynamic_pointer_cast<vmime::mailboxGroup> (address)) {
+						// TODO: mailboxGroup?
+					}
+				}
+			} else if (auto value = mimeField->getValue<vmime::datetime>()) {
+				field->set_attribute("year", std::to_string(value->getYear()));
+				field->set_attribute("month", std::to_string(value->getMonth()));
+				field->set_attribute("day", std::to_string(value->getDay()));
+				field->set_attribute("hour", std::to_string(value->getHour()));
+				field->set_attribute("minute", std::to_string(value->getMinute()));
+				field->set_attribute("second", std::to_string(value->getSecond()));
+				field->set_attribute("zone", std::to_string(value->getZone())); // timezone is in minutes
+				field->add_child_text(format(value));
+			} else if (auto value = mimeField->getValue<vmime::mediaType>()) {
+				std::string type = value->getType();
+				std::string subType = value->getSubType();
+				if (type.size()) field->set_attribute("type", type);
+				if (subType.size()) field->set_attribute("subType", subType);
+				if (type.size() && subType.size()) field->add_child_text(type + "/" + subType);
+				// TODO: encoding from the "Content-Type: text/plain; charset=us-ascii" type header?
+			} else if (auto value = mimeField->getValue<vmime::messageId>()) {
+				field->set_attribute("left", value->getLeft());
+				field->set_attribute("right", value->getRight());
+				field->add_child_text(value->getId());
+			} else if (auto value = mimeField->getValue<vmime::messageIdSequence>()) {
+				for (auto messageId : value->getMessageIdList()) {
+					xmlpp::Element* messageIdField = field->add_child("Mssage-ID"); // TODO: lower case?
+					messageIdField->set_attribute("left", messageId->getLeft());
+					messageIdField->set_attribute("right", messageId->getRight());
+					messageIdField->add_child_text(messageId->getId());
+				}
+			} else if (auto value = mimeField->getValue<vmime::contentDisposition>()) {
+				field->add_child_text(value->getName());
+			} else if (auto value = mimeField->getValue<vmime::relay>()) {
+				field->set_attribute("from", value->getFrom());
+				field->set_attribute("via", value->getVia());
+				field->set_attribute("by", value->getBy());
+				field->set_attribute("id", value->getId());
+				field->set_attribute("for", value->getFor());
+				// TODO: date of Received/relay
+				// TODO: missing values or incomplete parsing of Received/relay in vmime
+			} else if (auto value = mimeField->getValue<vmime::path>()) {
+				std::string local = value->getLocalPart();
+				std::string domain = value->getDomain();
+				if (local.size()) field->set_attribute("local", local);
+				if (domain.size()) field->set_attribute("domain", domain);
+				if (local.size() && domain.size()) field->add_child_text(local + "@" + domain);
+			} else if (auto value = mimeField->getValue<vmime::encoding>()) {
+				field->add_child_text(value->getName());
+			} else {
+				field->add_child_text("TODO: unknown header type"); // TODO: generic conversion as fallback?
+			}
+		}
+
+		xmlpp::Element* body = root->add_child("body");
 	}
 };