stash: move import logic into stash::commmands

Signed-off-by: NotAShelf <raf@notashelf.dev>
Change-Id: I6a6a6964f8fb8c9b14049ba3a343bb453ca59004

src/commands/import.rs

@@ -0,0 +1,77 @@
+use std::io::{self, BufRead};
+
+use log::{error, info};
+
+use crate::db::{
+  ClipboardDb,
+  Entry,
+  SqliteClipboardDb,
+  StashError,
+  detect_mime,
+};
+
+pub trait ImportCommand {
+  /// Import clipboard entries from TSV format.
+  ///
+  /// # Arguments
+  ///
+  /// * `input` - A readable stream containing TSV lines, each of the form
+  ///   `<id>\t<contents>`.
+  /// * `max_items` - The maximum number of clipboard entries to keep after
+  ///   import. If set to `u64::MAX`, no trimming occurs.
+  ///
+  /// # Returns
+  ///
+  /// * `Ok(())` if all entries are imported and trimming succeeds.
+  /// * `Err(StashError)` if any error occurs during import or trimming.
+  fn import_tsv(
+    &self,
+    input: impl io::Read,
+    max_items: u64,
+  ) -> Result<(), StashError>;
+}
+
+impl ImportCommand for SqliteClipboardDb {
+  fn import_tsv(
+    &self,
+    input: impl io::Read,
+    max_items: u64,
+  ) -> Result<(), StashError> {
+    let reader = io::BufReader::new(input);
+    let mut imported = 0;
+    for line in reader.lines().map_while(Result::ok) {
+      let mut parts = line.splitn(2, '\t');
+      let (Some(id_str), Some(val)) = (parts.next(), parts.next()) else {
+        error!("Malformed TSV line: {line:?}");
+        continue;
+      };
+
+      let Ok(_id) = id_str.parse::<u64>() else {
+        error!("Failed to parse id from line: {id_str}");
+        continue;
+      };
+
+      let entry = Entry {
+        contents: val.as_bytes().to_vec(),
+        mime:     detect_mime(val.as_bytes()),
+      };
+
+      match self.conn.execute(
+        "INSERT INTO clipboard (contents, mime) VALUES (?1, ?2)",
+        rusqlite::params![entry.contents, entry.mime],
+      ) {
+        Ok(_) => {
+          imported += 1;
+          info!("Imported entry from TSV");
+        },
+        Err(e) => error!("Failed to insert entry: {e}"),
+      }
+    }
+    info!("Imported {imported} records from TSV into SQLite database.");
+
+    // Trim database to max_items after import
+    self.trim_db(max_items)?;
+    info!("Trimmed clipboard database to max_items = {max_items}");
+    Ok(())
+  }
+}

src/commands/mod.rs

@@ -1,5 +1,6 @@
 pub mod decode;
 pub mod delete;
+pub mod import;
 pub mod list;
 pub mod query;
 pub mod store;