294 lines
10 KiB
Rust
294 lines
10 KiB
Rust
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//
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// imag - the personal information management suite for the commandline
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// Copyright (C) 2015, 2016 Matthias Beyer <mail@beyermatthias.de> and contributors
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//
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// This library is free software; you can redistribute it and/or
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// modify it under the terms of the GNU Lesser General Public
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// License as published by the Free Software Foundation; version
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// 2.1 of the License.
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//
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// This library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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// Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public
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// License along with this library; if not, write to the Free Software
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// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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//
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use std::collections::BTreeMap;
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use std::ops::{Deref, DerefMut};
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use std::io::BufRead;
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use std::result::Result as RResult;
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use toml::Value;
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use uuid::Uuid;
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use task_hookrs::task::Task as TTask;
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use task_hookrs::import::{import_task, import_tasks};
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use libimagstore::store::{FileLockEntry, Store};
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use libimagstore::storeid::{IntoStoreId, StoreIdIterator, StoreId};
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use libimagerror::trace::MapErrTrace;
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use libimagutil::debug_result::DebugResult;
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use module_path::ModuleEntryPath;
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use error::{TodoError, TodoErrorKind, MapErrInto};
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use result::Result;
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/// Task struct containing a `FileLockEntry`
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#[derive(Debug)]
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pub struct Task<'a>(FileLockEntry<'a>);
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impl<'a> Task<'a> {
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/// Concstructs a new `Task` with a `FileLockEntry`
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pub fn new(fle: FileLockEntry<'a>) -> Task<'a> {
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Task(fle)
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}
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pub fn import<R: BufRead>(store: &'a Store, mut r: R) -> Result<(Task<'a>, String, Uuid)> {
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let mut line = String::new();
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r.read_line(&mut line);
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import_task(&line.as_str())
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.map_err_into(TodoErrorKind::ImportError)
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.map_dbg_err_str("Error while importing task")
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.map_err_dbg_trace()
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.and_then(|t| {
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let uuid = t.uuid().clone();
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t.into_task(store).map(|t| (t, line, uuid))
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})
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}
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/// Get a task from an import string. That is: read the imported string, get the UUID from it
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/// and try to load this UUID from store.
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///
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/// Possible return values are:
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///
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/// * Ok(Ok(Task))
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/// * Ok(Err(String)) - where the String is the String read from the `r` parameter
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/// * Err(_) - where the error is an error that happened during evaluation
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///
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pub fn get_from_import<R: BufRead>(store: &'a Store, mut r: R) -> Result<RResult<Task<'a>, String>>
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{
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let mut line = String::new();
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r.read_line(&mut line);
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Task::get_from_string(store, line)
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}
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/// Get a task from a String. The String is expected to contain the JSON-representation of the
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/// Task to get from the store (only the UUID really matters in this case)
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///
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/// For an explanation on the return values see `Task::get_from_import()`.
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pub fn get_from_string(store: &'a Store, s: String) -> Result<RResult<Task<'a>, String>> {
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import_task(s.as_str())
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.map_err_into(TodoErrorKind::ImportError)
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.map_dbg_err_str("Error while importing task")
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.map_err_dbg_trace()
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.map(|t| t.uuid().clone())
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.and_then(|uuid| Task::get_from_uuid(store, uuid))
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.and_then(|o| match o {
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None => Ok(Err(s)),
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Some(t) => Ok(Ok(t)),
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})
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}
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/// Get a task from an UUID.
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///
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/// If there is no task with this UUID, this returns `Ok(None)`.
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pub fn get_from_uuid(store: &'a Store, uuid: Uuid) -> Result<Option<Task<'a>>> {
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ModuleEntryPath::new(format!("taskwarrior/{}", uuid))
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.into_storeid()
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.and_then(|store_id| store.get(store_id))
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.map(|o| o.map(Task::new))
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.map_err_into(TodoErrorKind::StoreError)
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}
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/// Same as Task::get_from_import() but uses Store::retrieve() rather than Store::get(), to
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/// implicitely create the task if it does not exist.
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pub fn retrieve_from_import<R: BufRead>(store: &'a Store, mut r: R) -> Result<Task<'a>> {
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let mut line = String::new();
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r.read_line(&mut line);
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Task::retrieve_from_string(store, line)
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}
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/// Retrieve a task from a String. The String is expected to contain the JSON-representation of
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/// the Task to retrieve from the store (only the UUID really matters in this case)
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pub fn retrieve_from_string(store: &'a Store, s: String) -> Result<Task<'a>> {
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Task::get_from_string(store, s)
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.and_then(|opt| match opt {
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Ok(task) => Ok(task),
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Err(string) => import_task(string.as_str())
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.map_err_into(TodoErrorKind::ImportError)
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.map_dbg_err_str("Error while importing task")
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.map_err_dbg_trace()
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.and_then(|t| t.into_task(store)),
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})
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}
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pub fn delete_by_imports<R: BufRead>(store: &Store, r: R) -> Result<()> {
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use serde_json::ser::to_string as serde_to_string;
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use task_hookrs::status::TaskStatus;
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for (counter, res_ttask) in import_tasks(r).into_iter().enumerate() {
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match res_ttask {
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Ok(ttask) => {
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if counter % 2 == 1 {
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// Only every second task is needed, the first one is the
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// task before the change, and the second one after
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// the change. The (maybe modified) second one is
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// expected by taskwarrior.
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match serde_to_string(&ttask).map_err_into(TodoErrorKind::ImportError) {
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// use println!() here, as we talk with TW
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Ok(val) => println!("{}", val),
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Err(e) => return Err(e),
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}
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// Taskwarrior does not have the concept of deleted tasks, but only modified
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// ones.
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//
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// Here we check if the status of a task is deleted and if yes, we delete it
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// from the store.
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if *ttask.status() == TaskStatus::Deleted {
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match Task::delete_by_uuid(store, *ttask.uuid()) {
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Ok(_) => info!("Deleted task {}", *ttask.uuid()),
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Err(e) => return Err(e),
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}
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}
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} // end if c % 2
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},
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Err(e) => return Err(e).map_err_into(TodoErrorKind::ImportError),
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}
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}
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Ok(())
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}
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pub fn delete_by_uuid(store: &Store, uuid: Uuid) -> Result<()> {
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ModuleEntryPath::new(format!("taskwarrior/{}", uuid))
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.into_storeid()
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.and_then(|id| store.delete(id))
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.map_err(|e| TodoError::new(TodoErrorKind::StoreError, Some(Box::new(e))))
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}
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pub fn all_as_ids(store: &Store) -> Result<StoreIdIterator> {
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store.retrieve_for_module("todo/taskwarrior")
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.map_err(|e| TodoError::new(TodoErrorKind::StoreError, Some(Box::new(e))))
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}
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pub fn all(store: &Store) -> Result<TaskIterator> {
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Task::all_as_ids(store)
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.map(|iter| TaskIterator::new(store, iter))
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}
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}
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impl<'a> Deref for Task<'a> {
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type Target = FileLockEntry<'a>;
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fn deref(&self) -> &FileLockEntry<'a> {
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&self.0
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}
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}
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impl<'a> DerefMut for Task<'a> {
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fn deref_mut(&mut self) -> &mut FileLockEntry<'a> {
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&mut self.0
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}
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}
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/// A trait to get a `libimagtodo::task::Task` out of the implementing object.
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pub trait IntoTask<'a> {
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/// # Usage
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/// ```ignore
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/// use std::io::stdin;
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///
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/// use task_hookrs::task::Task;
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/// use task_hookrs::import::import;
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/// use libimagstore::store::{Store, FileLockEntry};
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///
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/// if let Ok(task_hookrs_task) = import(stdin()) {
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/// // Store is given at runtime
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/// let task = task_hookrs_task.into_filelockentry(store);
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/// println!("Task with uuid: {}", task.flentry.get_header().get("todo.uuid"));
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/// }
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/// ```
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fn into_task(self, store : &'a Store) -> Result<Task<'a>>;
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}
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impl<'a> IntoTask<'a> for TTask {
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fn into_task(self, store : &'a Store) -> Result<Task<'a>> {
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let uuid = self.uuid();
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ModuleEntryPath::new(format!("taskwarrior/{}", uuid))
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.into_storeid()
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.map_err_into(TodoErrorKind::StoreIdError)
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.and_then(|id| {
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store.retrieve(id)
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.map_err_into(TodoErrorKind::StoreError)
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.and_then(|mut fle| {
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{
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let mut hdr = fle.get_header_mut();
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let read = hdr.read("todo").map_err_into(TodoErrorKind::StoreError);
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if try!(read).is_none() {
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try!(hdr
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.set("todo", Value::Table(BTreeMap::new()))
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.map_err_into(TodoErrorKind::StoreError));
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}
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try!(hdr.set("todo.uuid", Value::String(format!("{}",uuid)))
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.map_err_into(TodoErrorKind::StoreError));
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}
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// If none of the errors above have returned the function, everything is fine
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Ok(Task::new(fle))
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})
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})
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}
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}
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trait FromStoreId {
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fn from_storeid<'a>(&'a Store, StoreId) -> Result<Task<'a>>;
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}
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impl<'a> FromStoreId for Task<'a> {
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fn from_storeid<'b>(store: &'b Store, id: StoreId) -> Result<Task<'b>> {
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match store.retrieve(id) {
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Err(e) => Err(TodoError::new(TodoErrorKind::StoreError, Some(Box::new(e)))),
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Ok(c) => Ok(Task::new( c )),
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}
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}
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}
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pub struct TaskIterator<'a> {
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store: &'a Store,
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iditer: StoreIdIterator,
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}
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impl<'a> TaskIterator<'a> {
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pub fn new(store: &'a Store, iditer: StoreIdIterator) -> TaskIterator<'a> {
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TaskIterator {
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store: store,
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iditer: iditer,
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}
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}
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}
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impl<'a> Iterator for TaskIterator<'a> {
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type Item = Result<Task<'a>>;
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fn next(&mut self) -> Option<Result<Task<'a>>> {
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self.iditer.next().map(|id| Task::from_storeid(self.store, id))
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}
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}
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