Merge pull request #2 from mario-kr/impl_task

Impl task

libimagtodo/Cargo.toml

@@ -4,4 +4,10 @@ version = "0.1.0"
 authors = ["mario <mario-krehl@gmx.de>"]
 
 [dependencies]
+semver = "0.2"
 task-hookrs = { git = "https://github.com/matthiasbeyer/task-hookrs.git" }
+uuid = "0.2.0"
+toml = "0.1.28"
+
+[dependencies.libimagstore]
+path = "../libimagstore"

libimagtodo/src/error.rs

@@ -0,0 +1,67 @@
+use std::error::Error;
+use std::clone::Clone;
+use std::fmt::Error as FmtError;
+use std::fmt::{Debug, Display, Formatter};
+use std::fmt;
+
+/// Enum of Error Types, as of now we have two:
+/// * ConversionError: for Errors concerning conversion failures from task_hookrs::task::Task to
+/// libimagtodo::task::Task. unused.
+/// * StoreError: For Errors thrown by functions of the Store/structs relates to the Store
+#[derive(Clone, Copy, Debug, PartialEq)]
+pub enum TodoErrorKind {
+    ConversionError,
+    StoreError,
+}
+
+/// Maps a TodoErrorKind to a String
+fn todo_error_type_as_str(e: &TodoErrorKind) -> &'static str {
+    match e {
+        &TodoErrorKind::ConversionError     => "Conversion Error",
+        &TodoErrorKind::StoreError          => "Store Error",
+    }
+}
+
+impl Display for TodoErrorKind {
+    fn fmt(&self, fmt: &mut Formatter) -> Result<(), FmtError> {
+        try!(write!(fmt, "{}", todo_error_type_as_str(self)));
+        Ok(())
+    }
+}
+
+/// Error struct for the imag-todo module
+#[derive(Debug)]
+pub struct TodoError {
+    err_type : TodoErrorKind,
+    cause : Option<Box<Error>>,
+}
+
+impl TodoError {
+    /// Creates a new TodoError, with TodoErrorKind errtype and an optional cause
+    pub fn new(errtype : TodoErrorKind, cause : Option<Box<Error>>) -> TodoError {
+        TodoError {
+            err_type : errtype,
+            cause : cause,
+        }
+    }
+    /// Returns the error type (TodoErrorKind)
+    pub fn err_type(&self) -> TodoErrorKind {
+        self.err_type.clone()
+    }
+}
+
+impl Display for TodoError {
+    fn fmt(&self, fmt : &mut Formatter) -> Result<(), FmtError> {
+        try!(write!(fmt, "[{}]", todo_error_type_as_str(&self.err_type.clone())));
+        Ok(())
+    }
+}
+
+impl Error for TodoError {
+    fn description(&self) -> &str {
+        todo_error_type_as_str(&self.err_type.clone())
+    }
+    fn cause(&self) -> Option<&Error> {
+        self.cause.as_ref().map(|e| &**e)
+    }
+}

libimagtodo/src/lib.rs

@@ -1,3 +1,13 @@
+extern crate semver;
+extern crate uuid;
+extern crate toml;
+
+extern crate task_hookrs;
+#[macro_use] extern crate libimagstore;
+
+module_entry_path_mod!("todo", "0.1.0");
+
+pub mod error;
 pub mod task;
 pub mod delete;
 pub mod read;

libimagtodo/src/task.rs

@@ -1,8 +1,61 @@
-extern crate task_hookrs;
+use std::ops::Deref;
+use toml::Value;
 
-use self::task_hookrs::task::Task as TTask;
+use task_hookrs::task::Task as TTask;
 
-pub struct Task {
+use libimagstore::store::{FileLockEntry, Store};
-    uuid : str,
+use libimagstore::storeid::IntoStoreId;
+use module_path::ModuleEntryPath;
+
+use error::{TodoError, TodoErrorKind};
+
+/// Task struct containing a `FileLockEntry`
+#[derive(Debug)]
+pub struct Task<'a> {
+    flentry : FileLockEntry<'a>,
 }
 
+impl<'a> Task<'a> {
+    /// Concstructs a new `Task` with a `FileLockEntry`
+    pub fn new(fle : FileLockEntry<'a>) -> Task<'a> {
+        Task {
+            flentry : fle
+        }
+    }
+}
+
+/// A trait to get a `libimagtodo::task::Task` out of the implementing object.
+/// This Task struct is merely a wrapper for a `FileLockEntry`, therefore the function name
+/// `into_filelockentry`.
+pub trait IntoTask<'a> {
+    /// # Usage
+    /// ```ignore
+    /// use std::io::stdin;
+    ///
+    /// use task_hookrs::task::Task;
+    /// use task_hookrs::import::import;
+    /// use libimagstore::store::{Store, FileLockEntry};
+    ///
+    /// if let Ok(task_hookrs_task) = import(stdin()) {
+    ///     // Store is given at runtime
+    ///     let task = task_hookrs_task.into_filelockentry(store);
+    ///     println!("Task with uuid: {}", task.flentry.get_header().get("todo.uuid"));
+    /// }
+    /// ```
+    fn into_filelockentry(self, store : &'a Store) -> Result<Task<'a>, TodoError>;
+}
+impl<'a> IntoTask<'a> for TTask {
+    fn into_filelockentry(self, store : &'a Store) -> Result<Task<'a>, TodoError> {
+        let uuid = self.uuid();
+        let store_id = ModuleEntryPath::new(format!("taskwarrior/{}", uuid)).into_storeid();
+        match store.retrieve(store_id) {
+            Err(e)      => Err(TodoError::new(TodoErrorKind::StoreError, Some(Box::new(e)))),
+            Ok(mut fle)     => {
+                match fle.get_header_mut().set("todo.uuid", Value::String(format!("{}", uuid))) {
+                    Err(e) => Err(TodoError::new(TodoErrorKind::StoreError, Some(Box::new(e)))),
+                    Ok(_) => Ok(Task { flentry : fle })
+                }
+            },
+        }
+    }
+}