Add builder for todo entries

Signed-off-by: Matthias Beyer <mail@beyermatthias.de>

lib/domain/libimagtodo/src/builder.rs

@@ -0,0 +1,130 @@
+//
+// imag - the personal information management suite for the commandline
+// Copyright (C) 2015-2019 Matthias Beyer <mail@beyermatthias.de> and contributors
+//
+// This library is free software; you can redistribute it and/or
+// modify it under the terms of the GNU Lesser General Public
+// License as published by the Free Software Foundation; version
+// 2.1 of the License.
+//
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+// Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public
+// License along with this library; if not, write to the Free Software
+// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+//
+
+use chrono::NaiveDateTime;
+use failure::Fallible as Result;
+use failure::err_msg;
+use toml_query::insert::TomlValueInsertExt;
+use uuid::Uuid;
+
+use libimagstore::store::Store;
+use libimagstore::store::FileLockEntry;
+use libimagentryutil::isa::Is;
+use libimagutil::date::datetime_to_string;
+
+use crate::priority::Priority;
+use crate::status::Status;
+use crate::entry::IsTodo;
+use crate::entry::TodoHeader;
+use crate::store::date_sanity_check;
+
+
+pub struct TodoBuilder {
+    uuid: Option<Uuid>,
+    status: Option<Status>,
+    scheduled: Option<NaiveDateTime>,
+    hidden: Option<NaiveDateTime>,
+    due: Option<NaiveDateTime>,
+    prio: Option<Priority>,
+    check_sanity: bool,
+}
+
+impl TodoBuilder {
+    pub(crate) fn new() -> Self {
+        TodoBuilder {
+            uuid:      None,
+            status:    None,
+            scheduled: None,
+            hidden:    None,
+            due:       None,
+            prio:      None,
+            check_sanity: true,
+        }
+    }
+
+    pub fn build<'a>(self, store: &'a Store) -> Result<FileLockEntry<'a>> {
+        let uuid   = self.uuid.ok_or_else(|| err_msg("Uuid missing"))?;
+        let status = self.status.ok_or_else(|| err_msg("Status missing"))?;
+
+        if self.check_sanity {
+            trace!("Checking sanity before creating todo");
+            if let Err(s) = date_sanity_check(self.scheduled.as_ref(), self.hidden.as_ref(), self.due.as_ref()) {
+                trace!("Not sane.");
+                return Err(format_err!("{}", s))
+            }
+        }
+
+        let uuid_s = format!("{}", uuid.to_hyphenated_ref()); // TODO: not how it is supposed to be
+        debug!("Created new UUID for todo = {}", uuid_s);
+
+        let mut entry = crate::module_path::new_id(uuid_s).and_then(|id| store.create(id))?;
+
+        let header = TodoHeader {
+            uuid,
+            status,
+            scheduled: self.scheduled.as_ref().map(datetime_to_string),
+            hidden: self.hidden.as_ref().map(datetime_to_string),
+            due: self.due.as_ref().map(datetime_to_string),
+            priority: self.prio
+        };
+
+        debug!("Created header for todo: {:?}", header);
+
+        let _ = entry.get_header_mut().insert_serialized("todo", header)?;
+        let _ = entry.set_isflag::<IsTodo>()?;
+
+        Ok(entry)
+    }
+
+    pub fn with_uuid(mut self, uuid: Option<Uuid>) -> Self {
+        self.uuid = uuid;
+        self
+    }
+
+    pub fn with_status(mut self, status: Option<Status>) -> Self {
+        self.status = status;
+        self
+    }
+
+    pub fn with_scheduled(mut self, scheduled: Option<NaiveDateTime>) -> Self {
+        self.scheduled = scheduled;
+        self
+    }
+
+    pub fn with_hidden(mut self, hidden: Option<NaiveDateTime>) -> Self {
+        self.hidden = hidden;
+        self
+    }
+
+    pub fn with_due(mut self, due: Option<NaiveDateTime>) -> Self {
+        self.due = due;
+        self
+    }
+
+    pub fn with_prio(mut self, prio: Option<Priority>) -> Self {
+        self.prio = prio;
+        self
+    }
+
+    pub fn with_check_sanity(mut self, b: bool) -> Self {
+        self.check_sanity = b;
+        self
+    }
+
+}

lib/domain/libimagtodo/src/lib.rs

@@ -34,6 +34,7 @@ extern crate libimagutil;
 #[macro_use] extern crate libimagstore;
 #[macro_use] extern crate libimagentryutil;
 
+pub mod builder;
 pub mod entry;
 pub mod iter;
 pub mod priority;

lib/domain/libimagtodo/src/store.rs

@@ -22,20 +22,19 @@ use std::result::Result as RResult;
 use failure::Fallible as Result;
 use chrono::NaiveDateTime;
 use uuid::Uuid;
-use toml_query::insert::TomlValueInsertExt;
 
 use libimagstore::store::FileLockEntry;
 use libimagstore::store::Store;
 use libimagstore::iter::Entries;
-use libimagutil::date::datetime_to_string;
-use libimagentryutil::isa::Is;
 
 use crate::status::Status;
 use crate::priority::Priority;
-use crate::entry::TodoHeader;
-use crate::entry::IsTodo;
+use crate::builder::TodoBuilder;
 
 pub trait TodoStore<'a> {
+
+    fn todo_builder(&self) -> TodoBuilder;
+
     fn create_todo(&'a self,
                    status: Status,
                    scheduled: Option<NaiveDateTime>,
@@ -51,6 +50,13 @@ pub trait TodoStore<'a> {
 
 impl<'a> TodoStore<'a> for Store {
 
+    /// Get a TodoBuilder instance, which can be used to build a todo object.
+    ///
+    /// The TodoBuilder::new() constructor is not exposed, this function should be used instead.
+    fn todo_builder(&self) -> TodoBuilder {
+        TodoBuilder::new()
+    }
+
     /// Create a new todo entry
     ///
     /// # Warning
@@ -70,35 +76,15 @@ impl<'a> TodoStore<'a> for Store {
                    prio: Option<Priority>,
                    check_sanity: bool) -> Result<FileLockEntry<'a>>
     {
-        if check_sanity {
-            trace!("Checking sanity before creating todo");
-            if let Err(s) = date_sanity_check(scheduled.as_ref(), hidden.as_ref(), due.as_ref()) {
-                trace!("Not sane.");
-                return Err(format_err!("{}", s))
-            }
-        }
-
-        let uuid = Uuid::new_v4();
-        let uuid_s = format!("{}", uuid.to_hyphenated_ref()); // TODO: not how it is supposed to be
-        debug!("Created new UUID for todo = {}", uuid_s);
-
-        let mut entry = crate::module_path::new_id(uuid_s).and_then(|id| self.create(id))?;
-
-        let header = TodoHeader {
-            uuid,
-            status,
-            scheduled: scheduled.as_ref().map(datetime_to_string),
-            hidden: hidden.as_ref().map(datetime_to_string),
-            due: due.as_ref().map(datetime_to_string),
-            priority: prio
-        };
-
-        debug!("Created header for todo: {:?}", header);
-
-        let _ = entry.get_header_mut().insert_serialized("todo", header)?;
-        let _ = entry.set_isflag::<IsTodo>()?;
-
-        Ok(entry)
+        TodoBuilder::new()
+            .with_status(Some(status))
+            .with_uuid(Some(Uuid::new_v4()))
+            .with_scheduled(scheduled)
+            .with_hidden(hidden)
+            .with_due(due)
+            .with_prio(prio)
+            .with_check_sanity(check_sanity)
+            .build(&self)
     }
 
     fn get_todo_by_uuid(&'a self, uuid: &Uuid) -> Result<Option<FileLockEntry<'a>>> {