Reorganize spec evaluation

src/eval/command.rs

@@ -7,6 +7,10 @@ use crate::files::{Source, SourcedCommand};
 
 use super::{DateRange, Entry, EntryKind, Error, Result};
 
+mod birthday;
+mod date;
+mod formula;
+
 pub struct CommandState<'a> {
     command: SourcedCommand<'a>,
     range: DateRange,
@@ -121,11 +125,15 @@ impl<'a> CommandState<'a> {
     }
 
     fn eval_date(&mut self, spec: &Spec) -> Result<()> {
-        todo!()
+        match spec {
+            Spec::Date(spec) => self.eval_date_spec(spec.into()),
+            Spec::Weekday(spec) => self.eval_formula_spec(spec.into()),
+            Spec::Formula(spec) => self.eval_formula_spec(spec.into()),
+        }
     }
 
     fn eval_bdate(&mut self, spec: &BirthdaySpec) -> Result<()> {
-        todo!()
+        self.eval_birthday_spec(spec)
     }
 
     fn eval_except(&mut self, date: NaiveDate) {

src/eval/command/birthday.rs

@@ -0,0 +1,10 @@
+use crate::files::commands::BirthdaySpec;
+
+use super::super::command::CommandState;
+use super::super::Result;
+
+impl<'a> CommandState<'a> {
+    pub fn eval_birthday_spec(&mut self, spec: &BirthdaySpec) -> Result<()> {
+        todo!()
+    }
+}

src/eval/command/date.rs

@@ -1,10 +1,10 @@
 use chrono::NaiveDate;
 
-use crate::files::commands::{self, DoneDate, Spanned, Time};
-use crate::files::Source;
+use crate::files::commands::{self, Spanned, Time};
 
-use super::delta::{Delta, DeltaStep};
-use super::{Entry, Eval, Result};
+use super::super::command::CommandState;
+use super::super::delta::{Delta, DeltaStep};
+use super::super::Result;
 
 pub struct DateSpec {
     pub start: NaiveDate,
@@ -52,13 +52,8 @@ impl From<&commands::DateSpec> for DateSpec {
     }
 }
 
-impl Eval {
-    pub fn eval_date_spec(
-        &mut self,
-        spec: DateSpec,
-        last_done: Option<NaiveDate>,
-        new_entry: impl Fn(Source, Option<DoneDate>) -> Entry,
-    ) -> Result<()> {
+impl<'a> CommandState<'a> {
+    pub fn eval_date_spec(&mut self, spec: DateSpec) -> Result<()> {
         todo!()
     }
 }

src/eval/command/formula.rs

@@ -1,8 +1,8 @@
-use crate::files::commands::{self, DoneDate, Expr, Spanned, Time, Var};
-use crate::files::Source;
+use crate::files::commands::{self, Expr, Spanned, Time, Var};
 
-use super::delta::{Delta, DeltaStep};
-use super::{Entry, Eval, Result};
+use super::super::command::CommandState;
+use super::super::delta::{Delta, DeltaStep};
+use super::super::Result;
 
 pub struct FormulaSpec {
     // TODO Implement more efficient exprs and expr evaluation
@@ -77,12 +77,8 @@ impl From<&commands::WeekdaySpec> for FormulaSpec {
     }
 }
 
-impl Eval {
-    pub fn eval_formula_spec(
-        &mut self,
-        spec: FormulaSpec,
-        new_entry: impl Fn(Source, Option<DoneDate>) -> Entry,
-    ) -> Result<()> {
+impl<'a> CommandState<'a> {
+    pub fn eval_formula_spec(&mut self, spec: FormulaSpec) -> Result<()> {
         todo!()
     }
 }