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mimeparser: split parse_headers() into multiple functions

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This commit is contained in:
Alexander Krotov
2020-01-26 18:09:41 +03:00
parent ef842fca89
commit c7a300be2f
1 changed files with 56 additions and 31 deletions
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87
src/mimeparser.rs
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@@ -175,8 +175,8 @@ impl<'a> MimeMessage<'a> {
Ok(parser)
}
#[allow(clippy::cognitive_complexity)]
fn parse_headers(&mut self) -> Result<()> {
/// Parses system messages.
fn parse_system_message_headers(&mut self) -> Result<()> {
if self.get(HeaderDef::AutocryptSetupMessage).is_some() {
self.parts = self
.parts
@@ -198,7 +198,11 @@ impl<'a> MimeMessage<'a> {
self.is_system_message = SystemMessage::LocationStreamingEnabled;
}
}
Ok(())
}
/// Parses avatar action headers.
fn parse_avatar_headers(&mut self) {
if let Some(header_value) = self.get(HeaderDef::ChatGroupAvatar).cloned() {
self.group_avatar = self.avatar_action_from_header(header_value);
} else if let Some(header_value) = self.get(HeaderDef::ChatGroupImage).cloned() {
@@ -210,7 +214,13 @@ impl<'a> MimeMessage<'a> {
if let Some(header_value) = self.get(HeaderDef::ChatUserAvatar).cloned() {
self.user_avatar = self.avatar_action_from_header(header_value);
}
}
/// Squashes mutlipart chat messages with attachment into single-part messages.
///
/// Delta Chat sends attachments, such as images, in two-part messages, with the first message
/// containing an explanation. If such a message is detected, first part can be safely dropped.
fn squash_attachment_parts(&mut self) {
if self.has_chat_version() && self.parts.len() == 2 {
let need_drop = {
let textpart = &self.parts[0];
@@ -238,6 +248,48 @@ impl<'a> MimeMessage<'a> {
std::mem::replace(&mut self.parts[0], filepart);
}
}
}
/// Processes chat messages with attachments.
fn parse_attachments(&mut self) {
// Attachment messages should be squashed into a single part
// before calling this function.
if self.parts.len() == 1 {
if self.parts[0].typ == Viewtype::Audio
&& self.get(HeaderDef::ChatVoiceMessage).is_some()
{
let part_mut = &mut self.parts[0];
part_mut.typ = Viewtype::Voice;
}
if self.parts[0].typ == Viewtype::Image {
if let Some(value) = self.get(HeaderDef::ChatContent) {
if value == "sticker" {
let part_mut = &mut self.parts[0];
part_mut.typ = Viewtype::Sticker;
}
}
}
let part = &self.parts[0];
if part.typ == Viewtype::Audio
|| part.typ == Viewtype::Voice
|| part.typ == Viewtype::Video
{
if let Some(field_0) = self.get(HeaderDef::ChatDuration) {
let duration_ms = field_0.parse().unwrap_or_default();
if duration_ms > 0 && duration_ms < 24 * 60 * 60 * 1000 {
let part_mut = &mut self.parts[0];
part_mut.param.set_int(Param::Duration, duration_ms);
}
}
}
}
}
fn parse_headers(&mut self) -> Result<()> {
self.parse_system_message_headers()?;
self.parse_avatar_headers();
self.squash_attachment_parts();
if let Some(ref subject) = self.get_subject() {
let mut prepend_subject = true;
if !self.decrypting_failed {
@@ -273,35 +325,8 @@ impl<'a> MimeMessage<'a> {
part.param.set_int(Param::Forwarded, 1);
}
}
if self.parts.len() == 1 {
if self.parts[0].typ == Viewtype::Audio
&& self.get(HeaderDef::ChatVoiceMessage).is_some()
{
let part_mut = &mut self.parts[0];
part_mut.typ = Viewtype::Voice;
}
if self.parts[0].typ == Viewtype::Image {
if let Some(value) = self.get(HeaderDef::ChatContent) {
if value == "sticker" {
let part_mut = &mut self.parts[0];
part_mut.typ = Viewtype::Sticker;
}
}
}
let part = &self.parts[0];
if part.typ == Viewtype::Audio
|| part.typ == Viewtype::Voice
|| part.typ == Viewtype::Video
{
if let Some(field_0) = self.get(HeaderDef::ChatDuration) {
let duration_ms = field_0.parse().unwrap_or_default();
if duration_ms > 0 && duration_ms < 24 * 60 * 60 * 1000 {
let part_mut = &mut self.parts[0];
part_mut.param.set_int(Param::Duration, duration_ms);
}
}
}
}
self.parse_attachments();
// See if an MDN is requested from the other side
if !self.decrypting_failed && !self.parts.is_empty() {