edit command

src/edit.rs

@@ -0,0 +1,61 @@
+use std::fs;
+use std::mem;
+use std::path;
+use std::process;
+
+use crate::tasks;
+use crate::error;
+use crate::tasks::Id;
+
+pub fn edit_raw(id : Id, vault_folder : path::PathBuf) -> Result<(), error::Error> {
+
+    let mut task = tasks::Task::load(id, vault_folder.clone(), false)?;
+
+    let temp_path = vault_folder.join("temp.toml");
+
+    fs::copy(task.path(), &temp_path)?;
+
+    // This will be a matter of configuration later on.
+    let mut command = process::Command::new("nvim");
+
+    command 
+        .current_dir(&vault_folder)
+        .args(vec![&temp_path]);
+
+    let mut child = command.spawn()?;
+
+    let status = child.wait()?;
+
+    if !status.success() {
+        match status.code() {
+            Some(code) => Err(error::Error::Generic(format!("Process responded with a non-zero status code: {}", code))),
+            None => Err(error::Error::Generic(String::from("Process was interrupted by signal"))),
+        }
+    }
+    else {
+        let file_contents = fs::read_to_string(&temp_path)?;
+
+        let mut edited_task = tasks::Task::load_direct(temp_path.clone(), true)?;
+
+        if edited_task.data.id != task.data.id {
+            Err(error::Error::Generic(String::from("You cannot change the ID of a task in a direct edit")))
+        }
+        else {
+            if edited_task.data.dependencies != task.data.dependencies {
+                // This is where the other dependencies graph needs to be updated.
+            }
+            if edited_task.data.name != task.data.name {
+                // This is where the hashmap from id to string needs to be updated.
+            }
+
+            mem::swap(&mut edited_task.data, &mut task.data);
+            mem::drop(edited_task);
+
+            task.save()?;
+
+            fs::remove_file(&temp_path)?;
+
+            Ok(())
+        }
+    }
+}