Calendar (WIP)

common/Cargo.toml

@@ -7,3 +7,4 @@ edition = "2021"
 [dependencies]
 ron = "0.8"
 serde = { version = "1.0", features = ["derive"] }
+chrono = { version = "0.4", features = ["serde"] }

common/src/ron_api.rs

@@ -1,3 +1,4 @@
+use chrono::NaiveDate;
 use ron::ser::{to_string_pretty, PrettyConfig};
 use serde::{Deserialize, Serialize};
 
@@ -16,7 +17,7 @@ pub struct Id {
     pub id: i64,
 }
 
-///// RECIPE /////
+/// RECIPE ///
 
 #[derive(Serialize, Deserialize, Clone)]
 pub struct SetRecipeTitle {
@@ -158,7 +159,7 @@ pub struct Ingredient {
     pub quantity_unit: String,
 }
 
-///// PROFILE /////
+/// PROFILE ///
 
 #[derive(Serialize, Deserialize, Clone)]
 pub struct UpdateProfile {
@@ -174,3 +175,11 @@ where
     // TODO: handle'unwrap'.
     to_string_pretty(&ron, PrettyConfig::new()).unwrap()
 }
+
+/// Calendar ///
+
+#[derive(Serialize, Deserialize, Clone, Debug)]
+pub struct ScheduledRecipes {
+    // (Scheduled date, recipe title, recipe id).
+    pub recipes: Vec<(NaiveDate, String, i64)>,
+}

common/src/utils.rs

@@ -12,3 +12,44 @@ pub fn validate_password(password: &str) -> PasswordValidation {
         PasswordValidation::Ok
     }
 }
+
+pub fn substitute(str: &str, pattern: &str, replacements: &[&str]) -> String {
+    let mut result = String::with_capacity(
+        (str.len() + replacements.iter().map(|s| s.len()).sum::<usize>())
+            .saturating_sub(pattern.len() * replacements.len()),
+    );
+
+    let mut i = 0;
+    for s in str.split(pattern) {
+        result.push_str(s);
+        if i < replacements.len() {
+            result.push_str(replacements[i]);
+        }
+        i += 1;
+    }
+
+    if i == 1 {
+        return str.to_string();
+    }
+
+    result
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn test_substitute() {
+        assert_eq!(substitute("", "", &[]), "");
+        assert_eq!(substitute("", "", &[""]), "");
+        assert_eq!(substitute("", "{}", &["a"]), "");
+        assert_eq!(substitute("a", "{}", &["b"]), "a");
+        assert_eq!(substitute("a{}", "{}", &["b"]), "ab");
+        assert_eq!(substitute("{}c", "{}", &["b"]), "bc");
+        assert_eq!(substitute("a{}c", "{}", &["b"]), "abc");
+        assert_eq!(substitute("{}b{}", "{}", &["a", "c"]), "abc");
+        assert_eq!(substitute("{}{}{}", "{}", &["a", "bc", "def"]), "abcdef");
+        assert_eq!(substitute("{}{}{}", "{}", &["a"]), "a");
+    }
+}