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author | mario-kr <mario-krehl@gmx.de> | 2016-06-16 10:14:43 +0200 |
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committer | GitHub <noreply@github.com> | 2016-06-16 10:14:43 +0200 |
commit | 4b8bf877c1c2f3c228ff60bb6de89dc469cbbc34 (patch) | |
tree | 6d44bacb626baaf65166d4229f798e548f704009 /libimagtodo | |
parent | e42c1e61f3e9c876bdb7133da84fad0ed2750e2a (diff) | |
parent | 84581c73ca33a750be75a2d8536e30370eb04be9 (diff) |
Merge pull request #6 from rscheme/implement_read
Implement Read
Diffstat (limited to 'libimagtodo')
-rw-r--r-- | libimagtodo/src/read.rs | 56 |
1 files changed, 56 insertions, 0 deletions
diff --git a/libimagtodo/src/read.rs b/libimagtodo/src/read.rs index e69de29b..9129fb60 100644 --- a/libimagtodo/src/read.rs +++ b/libimagtodo/src/read.rs @@ -0,0 +1,56 @@ + +use libimagstore::storeid::{StoreIdIterator, StoreId}; +use libimagstore::store::Store; +use error::{TodoError, TodoErrorKind}; +use task::Task; + +use std::result::Result as RResult; + +pub type Result<T> = RResult<T, TodoError>; + + +pub fn all_todos(store: &Store) -> Result<TaskIterator> { + + store.retrieve_for_module("uuid") + .map(|iter| TaskIterator::new(store, iter)) + .map_err(|e| TodoError::new(TodoErrorKind::StoreError, Some(Box::new(e)))) +} + +trait FromStoreId { + fn from_storeid<'a>(&'a Store, StoreId) -> Result<Task<'a>>; +} + +impl<'a> FromStoreId for Task<'a> { + + fn from_storeid<'b>(store: &'b Store, id: StoreId) -> Result<Task<'b>> { + match store.retrieve(id) { + Err(e) => Err(TodoError::new(TodoErrorKind::StoreError, Some(Box::new(e)))), + Ok(c) => Ok(Task::new( c )), + } + } +} + +pub struct TaskIterator<'a> { + store: &'a Store, + iditer: StoreIdIterator, +} + +impl<'a> TaskIterator<'a> { + + pub fn new(store: &'a Store, iditer: StoreIdIterator) -> TaskIterator<'a> { + TaskIterator { + store: store, + iditer: iditer, + } + } +} + +impl<'a> Iterator for TaskIterator<'a> { + type Item = Result<Task<'a>>; + + fn next(&mut self) -> Option<Result<Task<'a>>> { + self.iditer + .next() + .map(|id| Task::from_storeid(self.store, id)) + } +} |