Allow filtering by status

cli/src/argparse/args.rs

@@ -10,7 +10,7 @@ use nom::{
     sequence::*,
     Err, IResult,
 };
-use taskchampion::Uuid;
+use taskchampion::{Status, Uuid};
 
 /// A task identifier, as given in a filter command-line expression
 #[derive(Debug, PartialEq, Clone)]
@@ -40,6 +40,32 @@ pub(super) fn literal(literal: &'static str) -> impl Fn(&str) -> IResult<&str, &
     move |input: &str| all_consuming(nomtag(literal))(input)
 }
 
+/// Recognizes a colon-prefixed pair
+pub(super) fn colon_prefixed(prefix: &'static str) -> impl Fn(&str) -> IResult<&str, &str> {
+    fn to_suffix<'a>(input: (&'a str, char, &'a str)) -> Result<&'a str, ()> {
+        Ok(input.2)
+    }
+    move |input: &str| {
+        map_res(
+            all_consuming(tuple((nomtag(prefix), char(':'), any))),
+            to_suffix,
+        )(input)
+    }
+}
+
+/// Recognizes `status:{pending,completed,deleted}`
+pub(super) fn status_colon(input: &str) -> IResult<&str, Status> {
+    fn to_status(input: &str) -> Result<Status, ()> {
+        match input {
+            "pending" => Ok(Status::Pending),
+            "completed" => Ok(Status::Completed),
+            "deleted" => Ok(Status::Deleted),
+            _ => Err(()),
+        }
+    }
+    map_res(colon_prefixed("status"), to_status)(input)
+}
+
 /// Recognizes a comma-separated list of TaskIds
 pub(super) fn id_list(input: &str) -> IResult<&str, Vec<TaskId>> {
     fn hex_n(n: usize) -> impl Fn(&str) -> IResult<&str, &str> {
@@ -164,6 +190,26 @@ mod test {
         assert!(arg_matching(plus_tag)(argv!["foo", "bar"]).is_err());
     }
 
+    #[test]
+    fn test_colon_prefixed() {
+        assert_eq!(colon_prefixed("foo")("foo:abc").unwrap().1, "abc");
+        assert_eq!(colon_prefixed("foo")("foo:").unwrap().1, "");
+        assert!(colon_prefixed("foo")("foo").is_err());
+    }
+
+    #[test]
+    fn test_status_colon() {
+        assert_eq!(status_colon("status:pending").unwrap().1, Status::Pending);
+        assert_eq!(
+            status_colon("status:completed").unwrap().1,
+            Status::Completed
+        );
+        assert_eq!(status_colon("status:deleted").unwrap().1, Status::Deleted);
+        assert!(status_colon("status:foo").is_err());
+        assert!(status_colon("status:complete").is_err());
+        assert!(status_colon("status").is_err());
+    }
+
     #[test]
     fn test_plus_tag() {
         assert_eq!(plus_tag("+abc").unwrap().1, "abc");

cli/src/argparse/filter.rs

@@ -1,4 +1,4 @@
-use super::args::{arg_matching, id_list, minus_tag, plus_tag, TaskId};
+use super::args::{arg_matching, id_list, minus_tag, plus_tag, status_colon, TaskId};
 use super::ArgList;
 use crate::usage;
 use nom::{branch::alt, combinator::*, multi::fold_many0, IResult};
@@ -25,7 +25,6 @@ pub(crate) enum Condition {
     /// Task does not have the given tag
     NoTag(String),
 
-    // TODO: add command-line syntax for this
     /// Task has the given status
     Status(Status),
 
@@ -36,7 +35,12 @@ pub(crate) enum Condition {
 impl Filter {
     pub(super) fn parse(input: ArgList) -> IResult<ArgList, Filter> {
         fold_many0(
-            alt((Self::id_list, Self::plus_tag, Self::minus_tag)),
+            alt((
+                Self::parse_id_list,
+                Self::parse_plus_tag,
+                Self::parse_minus_tag,
+                Self::parse_status,
+            )),
             Filter {
                 ..Default::default()
             },
@@ -78,25 +82,32 @@ impl Filter {
 
     // parsers
 
-    fn id_list(input: ArgList) -> IResult<ArgList, Condition> {
-        fn to_filterarg(input: Vec<TaskId>) -> Result<Condition, ()> {
+    fn parse_id_list(input: ArgList) -> IResult<ArgList, Condition> {
+        fn to_condition(input: Vec<TaskId>) -> Result<Condition, ()> {
             Ok(Condition::IdList(input))
         }
-        map_res(arg_matching(id_list), to_filterarg)(input)
+        map_res(arg_matching(id_list), to_condition)(input)
     }
 
-    fn plus_tag(input: ArgList) -> IResult<ArgList, Condition> {
-        fn to_filterarg(input: &str) -> Result<Condition, ()> {
+    fn parse_plus_tag(input: ArgList) -> IResult<ArgList, Condition> {
+        fn to_condition(input: &str) -> Result<Condition, ()> {
             Ok(Condition::HasTag(input.to_owned()))
         }
-        map_res(arg_matching(plus_tag), to_filterarg)(input)
+        map_res(arg_matching(plus_tag), to_condition)(input)
     }
 
-    fn minus_tag(input: ArgList) -> IResult<ArgList, Condition> {
-        fn to_filterarg(input: &str) -> Result<Condition, ()> {
+    fn parse_minus_tag(input: ArgList) -> IResult<ArgList, Condition> {
+        fn to_condition(input: &str) -> Result<Condition, ()> {
             Ok(Condition::NoTag(input.to_owned()))
         }
-        map_res(arg_matching(minus_tag), to_filterarg)(input)
+        map_res(arg_matching(minus_tag), to_condition)(input)
+    }
+
+    fn parse_status(input: ArgList) -> IResult<ArgList, Condition> {
+        fn to_condition(input: Status) -> Result<Condition, ()> {
+            Ok(Condition::Status(input))
+        }
+        map_res(arg_matching(status_colon), to_condition)(input)
     }
 
     // usage
@@ -123,6 +134,12 @@ impl Filter {
             description: "
                 Select tasks that do not have the given tag.",
         });
+        u.filters.push(usage::Filter {
+            syntax: "status:pending, status:completed, status:deleted",
+            summary: "Task status",
+            description: "
+                Select tasks with the given status.",
+        });
     }
 }
 
@@ -218,6 +235,21 @@ mod test {
         );
     }
 
+    #[test]
+    fn test_status() {
+        let (input, filter) = Filter::parse(argv!["status:completed", "status:pending"]).unwrap();
+        assert_eq!(input.len(), 0);
+        assert_eq!(
+            filter,
+            Filter {
+                conditions: vec![
+                    Condition::Status(Status::Completed),
+                    Condition::Status(Status::Pending),
+                ],
+            }
+        );
+    }
+
     #[test]
     fn intersect_idlist_idlist() {
         let left = Filter::parse(argv!["1,2", "+yes"]).unwrap().1;