added string to iso code using strum (#15)

Cargo.toml

@@ -47,8 +47,8 @@ rayon = "1.5.1"
 regex = "1.5.4"
 serde = { version = "1.0.126", features = ["derive"] }
 serde_json = "1.0.64"
-strum = "0.20.0"
-strum_macros = "0.20.1"
+strum = "0.21.0"
+strum_macros = "0.21.0"
 zip = "0.5.12"
 lingua-afrikaans-language-model = { path = "language-models/af", version = "1.0.0" }
 lingua-albanian-language-model = { path = "language-models/sq", version = "1.0.0" }

src/isocode.rs

@@ -15,12 +15,15 @@
  */
 
 use std::fmt::{Debug, Display, Formatter, Result};
+use std::str::FromStr;
+use strum_macros::EnumString;
 
 /// This enum specifies the ISO 639-1 code representations for the supported languages.
 ///
 /// ISO 639 is a standardized nomenclature used to classify languages.
-#[derive(Debug, Eq, PartialEq)]
+#[derive(Debug, Eq, PartialEq, EnumString)]
 #[allow(clippy::upper_case_acronyms)]
+#[strum(ascii_case_insensitive)]
 pub enum IsoCode639_1 {
     /// The ISO 639-1 code for [`Afrikaans`](./enum.Language.html#variant.Afrikaans)
     AF,
@@ -251,8 +254,9 @@ pub enum IsoCode639_1 {
 /// This enum specifies the ISO 639-3 code representations for the supported languages.
 ///
 /// ISO 639 is a standardized nomenclature used to classify languages.
-#[derive(Debug, Eq, PartialEq)]
+#[derive(Debug, Eq, PartialEq, EnumString)]
 #[allow(clippy::upper_case_acronyms)]
+#[strum(ascii_case_insensitive)]
 pub enum IsoCode639_3 {
     /// The ISO 639-3 code for [`Afrikaans`](./enum.Language.html#variant.Afrikaans)
     AFR,
@@ -507,4 +511,14 @@ mod tests {
     fn assert_iso_code_639_3_string_representation_is_correct() {
         assert_eq!(IsoCode639_3::ENG.to_string(), "eng");
     }
+
+    #[test]
+    fn assert_string_to_iso_code_639_1_is_correct() {
+        assert_eq!(IsoCode639_1::from_str("en").unwrap(), IsoCode639_1::EN);
+    }
+
+    #[test]
+    fn assert_string_to_iso_code_639_3_is_correct() {
+        assert_eq!(IsoCode639_3::from_str("eng").unwrap(), IsoCode639_3::ENG);
+    }
 }

src/language.rs

@@ -18,12 +18,14 @@ use crate::alphabet::Alphabet;
 use crate::isocode::{IsoCode639_1, IsoCode639_3};
 use serde::{Deserialize, Serialize};
 use std::collections::HashSet;
+use std::str::FromStr;
 use strum::IntoEnumIterator;
-use strum_macros::EnumIter;
+use strum_macros::{EnumIter, EnumString};
 
 /// This enum specifies the so far 75 supported languages which can be detected by *Lingua*.
-#[derive(Clone, Debug, Serialize, Deserialize, EnumIter, Eq, PartialEq, Hash, Ord, PartialOrd)]
+#[derive(Clone, Debug, Serialize, Deserialize, EnumIter, Eq, PartialEq, Hash, Ord, PartialOrd, EnumString)]
 #[serde(rename_all(serialize = "UPPERCASE", deserialize = "UPPERCASE"))]
+#[strum(ascii_case_insensitive)]
 pub enum Language {
     Afrikaans,
     Albanian,
@@ -434,6 +436,12 @@ mod tests {
         assert_eq!(deserialized, Language::English);
     }
 
+    #[test]
+    fn test_from_str() {
+        let language = Language::from_str("english").unwrap();
+        assert_eq!(language, Language::English);
+    }
+
     #[test]
     fn assert_all_languages_are_available() {
         assert_eq!(