Extract HTML tag remover to a function

Now that we're using it in two places, move it to a function. Also
remove the `unwrap` call.

1 files changed, 14 insertions, 6 deletions

diff --git a/src/main.rs b/src/main.rs
index 5c28dd1..ee2899e 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -49,6 +49,9 @@ enum WrapError {
     #[error("unable to parse email body")]
     ParseMailUnknown,
 
+    #[error("regex error: {0}")]
+    Regex(#[from] regex::Error),
+
     #[error(transparent)]
     Xdg(#[from] xdg::BaseDirectoriesError),
 
@@ -82,6 +85,8 @@ fn main() {
                 OttolangyError::Wrapped(WrapError::ParseMail(_))
                 | OttolangyError::Wrapped(WrapError::ParseMailUnknown) =>
                     process::exit(exitcode::DATAERR),
+                OttolangyError::Wrapped(WrapError::Regex(_)) =>
+                    process::exit(exitcode::SOFTWARE),
                 OttolangyError::Wrapped(WrapError::Xdg(_))
                 | OttolangyError::Wrapped(WrapError::Io(_))
                 | OttolangyError::WriteConfig(_) =>
@@ -136,8 +141,7 @@ fn get_email_body(email: &[u8]) -> Result<String, WrapError> {
         let mut body = email.get_body()?;
 
         if email.ctype.mimetype == "text/html" {
-            let re = Regex::new("<[^>]*>").unwrap();
-            body = re.replace_all(&body, "").into_owned();
+            body = unhtml(&body)?;
         }
 
         println!("body: {:?}", body);
@@ -171,10 +175,7 @@ fn extract_multipart_email_body(
 
     for part in &email.subparts {
         if email.ctype.mimetype == "text/html" {
-            let html_body = part.get_body()?;
-            let re = Regex::new("<[^>]*>").unwrap();
-
-            return Ok(re.replace_all(&html_body, "").into_owned());
+            return unhtml(&part.get_body()?);
         }
 
     }
@@ -182,6 +183,13 @@ fn extract_multipart_email_body(
     Err(WrapError::ParseMailUnknown)
 }
 
+/// Remove all HTML tags in `html`.
+fn unhtml(html: &str) -> Result<String, WrapError> {
+    let re = Regex::new("<[^>]*>")?;
+
+    Ok(re.replace_all(&html, "").into_owned())
+}
+
 /// Write the attribution config to a file.
 ///
 /// Store the file in the XDG data directory.