Added isolang as a message field.

Cargo.lock

@@ -472,6 +472,15 @@ version = "1.70.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "7943c866cc5cd64cbc25b2e01621d07fa8eb2a1a23160ee81ce38704e97b8ecf"
 
+[[package]]
+name = "isolang"
+version = "2.4.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "fe50d48c77760c55188549098b9a7f6e37ae980c586a24693d6b01c3b2010c3c"
+dependencies = [
+ "phf",
+]
+
 [[package]]
 name = "itoa"
 version = "1.0.15"
@@ -556,6 +565,7 @@ dependencies = [
  "chrono",
  "clap",
  "http-body-util",
+ "isolang",
  "serde_json",
  "tokio",
  "tower",
@@ -622,6 +632,24 @@ version = "2.3.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "e3148f5046208a5d56bcfc03053e3ca6334e51da8dfb19b6cdc8b306fae3283e"
 
+[[package]]
+name = "phf"
+version = "0.11.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1fd6780a80ae0c52cc120a26a1a42c1ae51b247a253e4e06113d23d2c2edd078"
+dependencies = [
+ "phf_shared",
+]
+
+[[package]]
+name = "phf_shared"
+version = "0.11.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "67eabc2ef2a60eb7faa00097bd1ffdb5bd28e62bf39990626a582201b7a754e5"
+dependencies = [
+ "siphasher",
+]
+
 [[package]]
 name = "pin-project-lite"
 version = "0.2.16"
@@ -766,6 +794,12 @@ dependencies = [
  "libc",
 ]
 
+[[package]]
+name = "siphasher"
+version = "1.0.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "56199f7ddabf13fe5074ce809e7d3f42b42ae711800501b5b16ea82ad029c39d"
+
 [[package]]
 name = "slab"
 version = "0.4.9"

Cargo.toml

@@ -9,6 +9,7 @@ edition = "2021"
 axum = ">=0.8.0"
 chrono = { version = ">=0.4.40", features = ["now"] }
 clap = { version = ">=4.5.1", features = ["derive"] }
+isolang = ">=2.4.0"
 serde_json = ">=1.0.140"
 tokio = { version = ">=1.36.0", features = ["full"] }
 tower-cookies = ">=0.11.0"

src/document.rs

@@ -11,6 +11,27 @@ use std::{
 
 const RESPONDS_TO: [MsgType; 1] = [MsgType::DocumentRequest];
 
+struct Table;
+
+impl Table {
+    fn new() -> Self {
+        Self {}
+    }
+
+    fn add_column(&self) {}
+}
+
+#[cfg(test)]
+mod tables {
+    use super::*;
+
+    #[test]
+    fn create_table() {
+        let tbl = Table::new();
+        tbl.add_column();
+    }
+}
+
 pub struct Document {
     data: HashMap<String, String>,
     queue: Queue,

src/field.rs

@@ -1,5 +1,6 @@
 use crate::{ActionType, ErrorType};
 use chrono::prelude::*;
+use isolang::Language;
 use std::fmt;
 use uuid::Uuid;
 
@@ -17,6 +18,7 @@ pub enum Field {
     Action(ActionType),
     DateTime(DateTime<Utc>),
     ErrorType(ErrorType),
+    Lang(Language),
     Static(String),
     Uuid(Uuid),
 }
@@ -49,6 +51,13 @@ impl Field {
             _ => Err("not an error type".to_string()),
         }
     }
+
+    pub fn to_language(&self) -> Result<Language, String> {
+        match self {
+            Field::Lang(data) => Ok(data.clone()),
+            _ => Err("not an error type".to_string()),
+        }
+    }
 }
 
 impl From<String> for Field {
@@ -95,6 +104,12 @@ impl From<ErrorType> for Field {
     }
 }
 
+impl From<Language> for Field {
+    fn from(value: Language) -> Self {
+        Field::Lang(value)
+    }
+}
+
 impl fmt::Display for Field {
     fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
         match self {
@@ -296,4 +311,40 @@ mod fields {
             Err(_) => {}
         }
     }
+
+    #[test]
+    fn from_lang_to_field() {
+        let langs = [
+            Language::from_639_1("en").unwrap(),
+            Language::from_639_1("ja").unwrap(),
+        ];
+        for lang in langs.into_iter() {
+            let field: Field = lang.into();
+            match field {
+                Field::Lang(data) => assert_eq!(data, lang),
+                _ => unreachable!("should identify language"),
+            }
+        }
+    }
+
+    #[test]
+    fn from_field_to_lang() {
+        let langs = [
+            Language::from_639_1("en").unwrap(),
+            Language::from_639_1("ja").unwrap(),
+        ];
+        for lang in langs.into_iter() {
+            let field: Field = lang.into();
+            assert_eq!(field.to_language().unwrap(), lang);
+        }
+    }
+
+    #[test]
+    fn wrong_field_to_lang() {
+        let field: Field = Uuid::nil().into();
+        match field.to_language() {
+            Ok(_) => unreachable!("should have produced an error"),
+            Err(_) => {}
+        }
+    }
 }