feat: combine magic plugins into single magic_file plugin

Co-authored-by: aider (openai/andrew/openrouter/anthropic/claude-sonnet-4) <aider@aider.chat>

src/meta_plugin/magic.rs

@@ -2,54 +2,30 @@ use anyhow::Result;
 use magic::{Cookie, CookieFlags};
 use std::io;
 use std::io::Write;
+use rusqlite::Connection;
 
 use crate::meta_plugin::MetaPlugin;
 
 #[derive(Debug, Clone)]
-pub struct MagicMetaPlugin {
+pub struct MagicFileMetaPlugin {
     buffer: Vec<u8>,
-    meta_name: String,
-    cookie_flags: CookieFlags,
+    is_saved: bool,
+    item_id: Option<i64>,
+    conn: Option<*mut Connection>,
 }
 
-impl MagicMetaPlugin {
-    pub fn new_file_type() -> MagicMetaPlugin {
-        MagicMetaPlugin {
+impl MagicFileMetaPlugin {
+    pub fn new() -> MagicFileMetaPlugin {
+        MagicFileMetaPlugin {
             buffer: Vec::new(),
-            meta_name: "magic_file_type".to_string(),
-            cookie_flags: CookieFlags::empty(),
+            is_saved: false,
+            item_id: None,
+            conn: None,
         }
     }
 
-    pub fn new_mime_type() -> MagicMetaPlugin {
-        MagicMetaPlugin {
-            buffer: Vec::new(),
-            meta_name: "magic_mime_type".to_string(),
-            cookie_flags: CookieFlags::MIME_TYPE,
-        }
-    }
-
-    pub fn new_mime_encoding() -> MagicMetaPlugin {
-        MagicMetaPlugin {
-            buffer: Vec::new(),
-            meta_name: "magic_mime_encoding".to_string(),
-            cookie_flags: CookieFlags::MIME_ENCODING,
-        }
-    }
-}
-
-impl MetaPlugin for MagicMetaPlugin {
-    fn is_internal(&self) -> bool {
-        true
-    }
-    
-    fn create(&self) -> Result<Box<dyn Write>> {
-        // For meta plugins, we don't actually create a writer since we're buffering data internally
-        Ok(Box::new(DummyWriter))
-    }
-
-    fn finalize(&mut self) -> io::Result<String> {
-        let cookie = Cookie::open(self.cookie_flags)
+    fn get_magic_result(&self, flags: CookieFlags) -> io::Result<String> {
+        let cookie = Cookie::open(flags)
             .map_err(|e| io::Error::new(io::ErrorKind::Other, format!("Failed to open magic cookie: {}", e)))?;
 
         cookie.load(&[] as &[&str])
@@ -64,7 +40,7 @@ impl MetaPlugin for MagicMetaPlugin {
         // For some magic results, we might want just the first part before semicolon or comma
         let cleaned = if trimmed.contains(';') {
             trimmed.split(';').next().unwrap_or(trimmed).trim()
-        } else if trimmed.contains(',') && self.meta_name.contains("mime") {
+        } else if trimmed.contains(',') && flags.contains(CookieFlags::MIME_TYPE | CookieFlags::MIME_ENCODING) {
             trimmed.split(',').next().unwrap_or(trimmed).trim()
         } else {
             trimmed
@@ -73,12 +49,79 @@ impl MetaPlugin for MagicMetaPlugin {
         Ok(cleaned.to_string())
     }
 
+    fn save_all_magic_metadata(&mut self) -> Result<()> {
+        if let (Some(conn), Some(item_id)) = (self.conn, self.item_id) {
+            let conn = unsafe { &*conn };
+            
+            // Save file type
+            if let Ok(file_type) = self.get_magic_result(CookieFlags::empty()) {
+                let meta = crate::db::Meta {
+                    id: item_id,
+                    name: "magic_file_type".to_string(),
+                    value: file_type,
+                };
+                crate::db::store_meta(conn, meta)?;
+            }
+            
+            // Save MIME type
+            if let Ok(mime_type) = self.get_magic_result(CookieFlags::MIME_TYPE) {
+                let meta = crate::db::Meta {
+                    id: item_id,
+                    name: "magic_mime_type".to_string(),
+                    value: mime_type,
+                };
+                crate::db::store_meta(conn, meta)?;
+            }
+            
+            // Save MIME encoding
+            if let Ok(mime_encoding) = self.get_magic_result(CookieFlags::MIME_ENCODING) {
+                let meta = crate::db::Meta {
+                    id: item_id,
+                    name: "magic_mime_encoding".to_string(),
+                    value: mime_encoding,
+                };
+                crate::db::store_meta(conn, meta)?;
+            }
+            
+            self.is_saved = true;
+        }
+        Ok(())
+    }
+}
+
+impl MetaPlugin for MagicFileMetaPlugin {
+    fn is_internal(&self) -> bool {
+        true
+    }
+    
+    fn create(&self) -> Result<Box<dyn Write>> {
+        // For meta plugins, we don't actually create a writer since we're buffering data internally
+        Ok(Box::new(DummyWriter))
+    }
+
+    fn initialize(&mut self, conn: &Connection, item_id: i64) -> Result<()> {
+        self.item_id = Some(item_id);
+        self.conn = Some(conn as *const Connection as *mut Connection);
+        Ok(())
+    }
+
+    fn finalize(&mut self) -> io::Result<String> {
+        // Save all magic metadata if not already saved
+        if !self.is_saved {
+            if let Err(e) = self.save_all_magic_metadata() {
+                return Err(io::Error::new(io::ErrorKind::Other, format!("Failed to save magic metadata: {}", e)));
+            }
+        }
+        // Return empty string since we save during finalize
+        Ok("".to_string())
+    }
+
     fn update(&mut self, data: &[u8]) {
         self.buffer.extend_from_slice(data);
     }
 
     fn meta_name(&mut self) -> String {
-        self.meta_name.clone()
+        "magic_file".to_string()
     }
 }