first step towards weekly planning

planner/src/bin/weekly.rs

@@ -0,0 +1,47 @@
+//! The weekly menu planner
+//!
+
+use cookbook::Meal;
+use planner::solver::{Variables, Domain, solve_all};
+
+
+fn generate_weekly_menu() -> String {
+    let assignments: Variables<Meal> = [
+        ("LundiMidi".to_string(), None), ("LundiSoir".to_string(), None),
+        ("MardiMidi".to_string(), None), ("MardiSoir".to_string(), None),
+        ("MercrediMidi".to_string(), None), ("MercrediSoir".to_string(), None),
+    ].iter().cloned().collect();
+    let meals: Domain<Meal> = Domain::new(vec![
+        Meal::new("Raclette".to_string(), 800),
+        Meal::new("Soupe".to_string(), 400),
+    ]);
+    let validator = |vars: &Variables<Meal>| {
+        let mut result = true;
+        for day in ["Lundi", "Mardi", "Mercredi"].into_iter() {
+            let all_day = vars.keys().filter(|k| k.starts_with(day));
+            let mut nutri_value = 0;
+            for key in all_day {
+                nutri_value += vars.get(key)
+                    .expect("no value here !")
+                    .expect("no meal there !")
+                    .nutritional_value()
+            }
+            println!("{} -> {}", day, nutri_value);
+            if nutri_value != 1200 { result = false; };
+        }
+        println!("Validator returns {}", result);
+        result
+    };
+
+    let solutions = solve_all(assignments, &meals, validator);
+    format!("{:#?}", solutions)
+}
+
+fn main() {
+    println!("{}", generate_weekly_menu());
+}
+
+#[cfg(test)]
+mod tests {
+
+}