Add CLI with save feature

1 files changed, 42 insertions, 0 deletions

diff --git a/src/cli/cmd/save.rs b/src/cli/cmd/save.rs
new file mode 100644
index 0000000..2c022cf
--- /dev/null
+++ b/src/cli/cmd/save.rs
@@ -0,0 +1,42 @@
+//! Save the contents of the map to disk
+
+use super::Command;
+use super::{CmdParseError, FromArgs};
+use crate::map::MapData;
+use crate::Editor;
+use std::path::PathBuf;
+
+/// The save command can take any destination in the filesystem the user can write to. Processing
+/// will then save the map contents to that destination, overwriting anything that may be there.
+pub struct Save {
+    destination: PathBuf,
+}
+
+impl FromArgs for Save {
+    fn from_args(args: &[&str]) -> Result<Self, CmdParseError> {
+        if args.len() != 1 {
+            return Err(CmdParseError::WrongNumberOfArgs(args.len(), 1..=1));
+        }
+
+        Ok(Self {
+            destination: PathBuf::from(args[0]),
+        })
+    }
+}
+
+impl Command for Save {
+    fn process(&self, editor: &mut Editor) -> Result<String, String> {
+        let data = MapData::extract_data(editor.map());
+
+        match data.write_to_file(&self.destination) {
+            Ok(_) => Ok(format!(
+                "Successfully wrote contents to `{:?}`",
+                &self.destination
+            )),
+            Err(e) => Err(format!(
+                "Unable to write to `{:?}`. Error: {:?}",
+                &self.destination, e
+            )),
+        }
+    }
+}