From 525bd1649316c3f0abc5234cd4470fa124712289 Mon Sep 17 00:00:00 2001
From: Manos Pitsidianakis <el13635@mail.ntua.gr>
Date: Mon, 26 Aug 2019 20:04:02 +0300
Subject: [PATCH] imap: add folder operations in backend

---
 melib/src/backends/imap.rs | 54 +++++++++++++++++++++++++++++++++++++-
 1 file changed, 53 insertions(+), 1 deletion(-)

diff --git a/melib/src/backends/imap.rs b/melib/src/backends/imap.rs
index 7307336c..3ecee812 100644
--- a/melib/src/backends/imap.rs
+++ b/melib/src/backends/imap.rs
@@ -36,7 +36,7 @@ use crate::backends::BackendOp;
 use crate::backends::FolderHash;
 use crate::backends::RefreshEvent;
 use crate::backends::RefreshEventKind::{self, *};
-use crate::backends::{BackendFolder, Folder, MailBackend, RefreshEventConsumer};
+use crate::backends::{BackendFolder, Folder, FolderOperation, MailBackend, RefreshEventConsumer};
 use crate::conf::AccountSettings;
 use crate::email::*;
 use crate::error::{MeliError, Result};
@@ -525,6 +525,58 @@ impl MailBackend for ImapType {
         conn.read_response(&mut response)?;
         Ok(())
     }
+
+    fn folder_operation(&mut self, path: &str, op: FolderOperation) -> Result<()> {
+        use FolderOperation::*;
+
+        match (&op, self.folders.values().any(|f| f.path == path)) {
+            (Create, true) => {
+                return Err(MeliError::new(format!(
+                    "Folder named `{}` in account `{}` already exists.",
+                    path, self.account_name,
+                )));
+            }
+            (op, false) if *op != Create => {
+                return Err(MeliError::new(format!(
+                    "No folder named `{}` in account `{}`",
+                    path, self.account_name,
+                )));
+            }
+            _ => {}
+        }
+
+        let mut response = String::with_capacity(8 * 1024);
+        match op {
+            Create => {
+                let mut conn = self.connection.lock()?;
+                conn.send_command(format!("CREATE \"{}\"", path,).as_bytes())?;
+                conn.read_response(&mut response)?;
+                conn.send_command(format!("SUBSCRIBE \"{}\"", path,).as_bytes())?;
+                conn.read_response(&mut response)?;
+            }
+            Rename(dest) => {
+                let mut conn = self.connection.lock()?;
+                conn.send_command(format!("RENAME \"{}\" \"{}\"", path, dest).as_bytes())?;
+                conn.read_response(&mut response)?;
+            }
+            Delete => {
+                let mut conn = self.connection.lock()?;
+                conn.send_command(format!("DELETE \"{}\"", path,).as_bytes())?;
+                conn.read_response(&mut response)?;
+            }
+            Subscribe => {
+                let mut conn = self.connection.lock()?;
+                conn.send_command(format!("SUBSCRIBE \"{}\"", path,).as_bytes())?;
+                conn.read_response(&mut response)?;
+            }
+            Unsubscribe => {
+                let mut conn = self.connection.lock()?;
+                conn.send_command(format!("UNSUBSCRIBE \"{}\"", path,).as_bytes())?;
+                conn.read_response(&mut response)?;
+            }
+        }
+        Ok(())
+    }
 }
 
 fn lookup_ipv4(host: &str, port: u16) -> Result<SocketAddr> {