✨ feat(processor): implement message deletion functionality

- add `delete_messages` function to delete messages based on label and query
- add execute flag to processor struct to control the execution of deletion

src/processor.rs

@@ -1,12 +1,13 @@
 // use crate::EolRule;
 
-use crate::{Result, Trash, config::EolRule};
+use crate::{Delete, Result, Trash, config::EolRule};
 
 /// Rule processor
 #[derive(Debug)]
 pub struct Processor {
     credential_file: String,
     rule: EolRule,
+    execute: bool,
 }
 
 impl Processor {
@@ -14,6 +15,7 @@ impl Processor {
         Processor {
             credential_file,
             rule,
+            execute: false,
         }
     }
 
@@ -31,4 +33,24 @@ impl Processor {
 
         messages_to_trash.run(0).await
     }
+
+    async fn delete_messages(&self, label: &str) -> Result<()> {
+        let mut messages_to_delete = Delete::new(&self.credential_file).await?;
+
+        messages_to_delete
+            .message_list()
+            .add_labels(&self.credential_file, &[label.to_string()])
+            .await?;
+
+        messages_to_delete
+            .message_list()
+            .set_query(&self.rule.eol_query());
+
+        messages_to_delete.prepare(0).await?;
+        if self.execute {
+            messages_to_delete.batch_delete().await
+        } else {
+            Ok(())
+        }
+    }
 }