207 lines
8.7 KiB
Rust
207 lines
8.7 KiB
Rust
//
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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::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};
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use module_path::ModuleEntryPath;
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use error::TodoErrorKind as TEK;
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use error::TodoError as TE;
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use error::Result;
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use error::ResultExt;
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/// Task struct containing a `FileLockEntry`
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pub trait TaskStore<'a> {
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fn import_task_from_reader<R: BufRead>(&'a self, r: R) -> Result<(FileLockEntry<'a>, String, Uuid)>;
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fn get_task_from_import<R: BufRead>(&'a self, r: R) -> Result<RResult<FileLockEntry<'a>, String>>;
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fn get_task_from_string(&'a self, s: String) -> Result<RResult<FileLockEntry<'a>, String>>;
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fn get_task_from_uuid(&'a self, uuid: Uuid) -> Result<Option<FileLockEntry<'a>>>;
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fn retrieve_task_from_import<R: BufRead>(&'a self, r: R) -> Result<FileLockEntry<'a>>;
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fn retrieve_task_from_string(&'a self, s: String) -> Result<FileLockEntry<'a>>;
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fn delete_tasks_by_imports<R: BufRead>(&self, r: R) -> Result<()>;
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fn delete_task_by_uuid(&self, uuid: Uuid) -> Result<()>;
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fn all_tasks(&self) -> Result<StoreIdIterator>;
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fn new_from_twtask(&'a self, task: TTask) -> Result<FileLockEntry<'a>>;
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}
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impl<'a> TaskStore<'a> for Store {
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fn import_task_from_reader<R: BufRead>(&'a self, mut r: R) -> Result<(FileLockEntry<'a>, String, Uuid)> {
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let mut line = String::new();
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r.read_line(&mut line).map_err(|_| TE::from_kind(TEK::UTF8Error))?;
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import_task(&line.as_str())
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.map_err(|_| TE::from_kind(TEK::ImportError))
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.and_then(|t| {
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let uuid = t.uuid().clone();
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self.new_from_twtask(t).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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fn get_task_from_import<R: BufRead>(&'a self, mut r: R) -> Result<RResult<FileLockEntry<'a>, String>> {
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let mut line = String::new();
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r.read_line(&mut line).chain_err(|| TEK::UTF8Error)?;
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self.get_task_from_string(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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fn get_task_from_string(&'a self, s: String) -> Result<RResult<FileLockEntry<'a>, String>> {
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import_task(s.as_str())
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.map_err(|_| TE::from_kind(TEK::ImportError))
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.map(|t| t.uuid().clone())
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.and_then(|uuid| self.get_task_from_uuid(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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fn get_task_from_uuid(&'a self, uuid: Uuid) -> Result<Option<FileLockEntry<'a>>> {
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ModuleEntryPath::new(format!("taskwarrior/{}", uuid))
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.into_storeid()
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.and_then(|store_id| self.get(store_id))
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.chain_err(|| TEK::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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fn retrieve_task_from_import<R: BufRead>(&'a self, mut r: R) -> Result<FileLockEntry<'a>> {
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let mut line = String::new();
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r.read_line(&mut line).chain_err(|| TEK::UTF8Error)?;
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self.retrieve_task_from_string(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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fn retrieve_task_from_string(&'a self, s: String) -> Result<FileLockEntry<'a>> {
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self.get_task_from_string(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(|_| TE::from_kind(TEK::ImportError))
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.and_then(|t| self.new_from_twtask(t)),
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})
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}
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fn delete_tasks_by_imports<R: BufRead>(&self, 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).chain_err(|| TEK::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 self.delete_task_by_uuid(*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(_) => return Err(TE::from_kind(TEK::ImportError)),
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}
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}
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Ok(())
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}
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fn delete_task_by_uuid(&self, 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| self.delete(id))
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.chain_err(|| TEK::StoreError)
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}
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fn all_tasks(&self) -> Result<StoreIdIterator> {
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self.retrieve_for_module("todo/taskwarrior")
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.chain_err(|| TEK::StoreError)
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}
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fn new_from_twtask(&'a self, task: TTask) -> Result<FileLockEntry<'a>> {
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use toml_query::read::TomlValueReadExt;
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use toml_query::set::TomlValueSetExt;
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let uuid = task.uuid();
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ModuleEntryPath::new(format!("taskwarrior/{}", uuid))
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.into_storeid()
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.chain_err(|| TEK::StoreIdError)
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.and_then(|id| {
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self.retrieve(id)
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.chain_err(|| TEK::StoreError)
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.and_then(|mut fle| {
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{
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let hdr = fle.get_header_mut();
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if hdr.read("todo").chain_err(|| TEK::StoreError)?.is_none() {
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hdr
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.set("todo", Value::Table(BTreeMap::new()))
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.chain_err(|| TEK::StoreError)?;
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}
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hdr.set("todo.uuid", Value::String(format!("{}",uuid)))
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.chain_err(|| TEK::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(fle)
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})
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})
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}
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}
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