From 660bacb9262dac7457bd8c421cc70343a0db3cd5 Mon Sep 17 00:00:00 2001
From: Manos Pitsidianakis <el13635@mail.ntua.gr>
Date: Fri, 30 Dec 2022 17:02:10 +0200
Subject: [PATCH] Add `mailto` command to open composer with initial values
 from mailto template

---
 docs/meli.1                    |  4 ++++
 melib/src/email/mailto.rs      | 10 ++++++++--
 melib/src/email/parser.rs      |  8 +++++++-
 src/command.rs                 | 15 +++++++++++++++
 src/command/actions.rs         |  1 +
 src/components/mail/listing.rs |  9 +++++++++
 6 files changed, 44 insertions(+), 3 deletions(-)

diff --git a/docs/meli.1 b/docs/meli.1
index e248538a..8a721d7e 100644
--- a/docs/meli.1
+++ b/docs/meli.1
@@ -472,6 +472,10 @@ open list archive with
 .El
 .Ss composing mail commands
 .Bl -tag -width 36n
+.It Cm mailto Ar MAILTO_ADDRESS
+Opens a composer tab with initial values parsed from the
+.Li mailto:
+address.
 .It Cm add-attachment Ar PATH
 in composer, add
 .Ar PATH
diff --git a/melib/src/email/mailto.rs b/melib/src/email/mailto.rs
index a5ecaa15..efec1bb7 100644
--- a/melib/src/email/mailto.rs
+++ b/melib/src/email/mailto.rs
@@ -23,7 +23,7 @@
 use super::*;
 use std::convert::TryFrom;
 
-#[derive(Debug)]
+#[derive(Debug, Clone)]
 pub struct Mailto {
     pub address: Address,
     pub subject: Option<String>,
@@ -47,7 +47,13 @@ impl From<Mailto> for Draft {
         ret.set_header("Bcc", bcc.unwrap_or_default());
         ret.set_body(body.unwrap_or_default());
         ret.set_header("To", address.to_string());
-        debug!(ret)
+        ret
+    }
+}
+
+impl From<&Mailto> for Draft {
+    fn from(val: &Mailto) -> Self {
+        Draft::from(val.clone())
     }
 }
 
diff --git a/melib/src/email/parser.rs b/melib/src/email/parser.rs
index 72f64885..efb66fa8 100644
--- a/melib/src/email/parser.rs
+++ b/melib/src/email/parser.rs
@@ -184,6 +184,12 @@ impl From<nom::Err<nom::error::Error<&[u8]>>> for Error {
     }
 }
 
+impl<'i> From<ParsingError<&'i [u8]>> for nom::error::Error<&'i [u8]> {
+    fn from(val: ParsingError<&'i [u8]>) -> nom::error::Error<&'i [u8]> {
+        nom::error::Error::new(val.input, ErrorKind::Satisfy)
+    }
+}
+
 macro_rules! is_ctl_or_space {
     ($var:ident) => {
         /* <any ASCII control character and DEL> */
@@ -952,7 +958,7 @@ pub mod generic {
             let value = String::from_utf8_lossy(&input[..value_end]).to_string();
             match tag {
                 b"subject" if subject.is_none() => {
-                    subject = Some(value);
+                    subject = Some(value.replace("%20", " "));
                 }
                 b"cc" if cc.is_none() => {
                     cc = Some(value);
diff --git a/src/command.rs b/src/command.rs
index c83008bf..562b1a5d 100644
--- a/src/command.rs
+++ b/src/command.rs
@@ -500,6 +500,20 @@ define_commands!([
                       }
                   )
                 },
+                { tags: ["mailto "],
+                  desc: "mailto MAILTO_ADDRESS",
+                  tokens: &[One(Literal("mailto")), One(QuotedStringValue)],
+                  parser:(
+                      fn mailto(input: &[u8]) -> IResult<&[u8], Action> {
+                          let (input, _) = tag("mailto")(input.ltrim())?;
+                          let (input, _) = is_a(" ")(input)?;
+                          let (input, val) = map_res(not_line_ending, std::str::from_utf8)(input.trim())?;
+                          let (_empty, _) = eof(input)?;
+                          let (input, val) = melib::email::parser::generic::mailto(val.as_bytes()).map_err(|err| err.map(Into::into))?;
+                          Ok((input, Compose(Mailto(val))))
+                      }
+                  )
+                },
                 /* Pipe pager contents to binary */
                 { tags: ["pipe "],
                   desc: "pipe EXECUTABLE ARGS",
@@ -931,6 +945,7 @@ fn listing_action(input: &[u8]) -> IResult<&[u8], Action> {
 fn compose_action(input: &[u8]) -> IResult<&[u8], Action> {
     alt((
         add_attachment,
+        mailto,
         remove_attachment,
         toggle_sign,
         toggle_encrypt,
diff --git a/src/command/actions.rs b/src/command/actions.rs
index 8cc89aea..7152471e 100644
--- a/src/command/actions.rs
+++ b/src/command/actions.rs
@@ -89,6 +89,7 @@ pub enum ComposeAction {
     SaveDraft,
     ToggleSign,
     ToggleEncrypt,
+    Mailto(melib::Mailto),
 }
 
 #[derive(Debug)]
diff --git a/src/components/mail/listing.rs b/src/components/mail/listing.rs
index 849d2370..5a0e9d06 100644
--- a/src/components/mail/listing.rs
+++ b/src/components/mail/listing.rs
@@ -1889,6 +1889,15 @@ impl Component for Listing {
                     .push_back(UIEvent::Action(Tab(New(Some(Box::new(mgr))))));
                 return true;
             }
+            UIEvent::Action(Action::Compose(ComposeAction::Mailto(ref mailto))) => {
+                let account_hash = context.accounts[self.cursor_pos.0].hash();
+                let mut composer = Composer::with_account(account_hash, context);
+                composer.set_draft(mailto.into());
+                context
+                    .replies
+                    .push_back(UIEvent::Action(Tab(New(Some(Box::new(composer))))));
+                return true;
+            }
             UIEvent::StartupCheck(_)
             | UIEvent::MailboxUpdate(_)
             | UIEvent::EnvelopeUpdate(_)