Adapted err library, dtos and enums to fit Kotlin and Swift data types

Cargo.toml

@@ -15,3 +15,6 @@ serde = { version = "1.0", features = ["derive"] }
 thiserror = "1.0.48"
 sqlx = { version = "0.7", features = ["json"] }
 stdext = "0.3.1"
+
+[dev-dependencies]
+serde_json = { version = "1" }

src/lib.rs

@@ -1,4 +1,5 @@
 mod macros;
+mod tests;
 
 use std::fmt::Display;
 use serde::{Serialize, Deserialize, Serializer};
@@ -7,6 +8,7 @@ use thiserror::Error;
 
 pub use stdext::function_name;
 
+
 #[derive(Serialize, Deserialize, Debug, Clone, PartialEq, Eq, PartialOrd, Ord, Default)]
 pub struct Trace {
     pub line: u32,
@@ -21,7 +23,7 @@ impl Trace {
     }
 }
 #[derive(Serialize, Deserialize, Debug, Clone, PartialEq, Eq, PartialOrd, Ord)]
-pub struct Traces(pub Vec<Trace>);
+pub struct Traces { pub traces: Vec<Trace> }
 
 
 #[derive(Serialize, Debug, Error)]
@@ -37,17 +39,18 @@ pub struct Error {
 impl Error {
     pub fn new(trace: Trace) -> Self {
         Self {
-            trace: Traces(Vec::from([trace])),
+            trace: Traces { traces: Vec::from([trace]) },
             message_resource: MessageResource::new("errors.backend.common.default", "We still don't have an error defined for this."),
             error_type: ErrorType::Unspecified,
         }
     }
     pub fn push_trace(mut self, trace: Trace) -> Self {
-        self.trace.0.push(trace);
+        self.trace.traces.push(trace);
         self
     }
+    
     pub fn push_error(mut self, error: Error) -> Self {
-        self.error_type = ErrorType::Nested(Box::new(error));
+        self.error_type = ErrorType::Nested { nested: Box::new(error) };
         self
     }
     pub fn key(mut self, key: Option<impl ToString>) -> Self {
@@ -77,11 +80,13 @@ pub struct MessageResource {
     pub key: Option<String>,
     pub message: String,
 }
+
 impl Display for MessageResource {
     fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
         write!(f, "MessageResource Key: {:#?}, Message: {}", self.key, self.message)
     }
 }
+
 impl MessageResource {
     pub fn new(key: &str, msg: &str) -> Self {
         Self { key: Some(key.to_string()), message: msg.to_string() }
@@ -115,20 +120,20 @@ pub enum ErrorType {
     IO,
     #[error("Privilege Error")]
     Privilege,
-    #[error("Unexpected Status Code. Expected: {0} Actual: {1}")]
+    #[error("Unexpected Status Code. Expected: {expected} Actual: {actual}")]
-    UnexpectedStatusCode(u16, u16),
+    UnexpectedStatusCode { expected: u16, actual: u16 },
-    #[error("Serde Error. Attempted to Serialize/Deserialize String: {0}")]
+    #[error("Serde Error. Attempted to Serialize/Deserialize String: {text}")]
-    Serde(String),
+    Serde { text: String },
     #[error("Parsing error.")]
     Parser,
-    #[error("Service Error: {0}")]
+    #[error("Service Error: {error}")]
-    Service(ServiceError),
+    Service { error: ServiceError },
     #[error("Unspecified Error")]
     Unspecified,
-    #[error("Unexpected Error: {0}")]
+    #[error("Unexpected Error: {message}")]
-    Unexpected(String),
+    Unexpected { message: String },
-    #[error("Nested Error: {0:?}")]
+    #[error("Nested Error: {nested}")]
-    Nested(Box<Error>),
+    Nested { nested: Box<Error> },
 }
 
 #[derive(Error, Serialize, Debug)]
@@ -137,28 +142,33 @@ pub enum ServiceError {
     #[error("Error parsing string into value")]
     FromStrError,
     /// Every error that is returned from a DAO operation.
-    #[error("Error from the Database: {0}")]
+    #[error("Error from the Database: {error}")]
     #[serde(serialize_with = "ser_with")]
-    DatabaseError(#[from] sqlx::Error),
+    DatabaseError {
+        #[from] 
+        error: sqlx::Error
+    },
     /// A vec of ValidationErrors
-    #[error("Validation Errors: {0:?}")]
+    #[error("Error Operation Not Allowed: {message}")]
-    ValidationErrors(Vec<ValidationError>),
+    NotAllowed { message: String },
+    #[error("Validation Errors: {errors:?}")]
+    ValidationErrors { errors: Vec<ValidationError> },
     /// Something already exists. That something should be {0}
     /// Example: "User" "Credential"
-    #[error("Error {0} Already exists.")]
+    #[error("Error {message} Already exists.")]
-    AlreadyExistsError(String),
+    AlreadyExistsError { message: String },
     /// Example: "User with id X"
-    #[error("{0} Not found.")]
+    #[error("{message} Not found.")]
-    NotFoundError(String),
+    NotFoundError { message: String },
     /// Used to specify authentication error.
     /// Example: Password incorrect for user
-    #[error("Credential supplied is incorrect. {0}")]
+    #[error("Credential supplied is incorrect. {message}")]
-    IncorrectCredentialError(String),
+    IncorrectCredentialError { message: String },
     #[error("Too many credentials supplied, maximum is 3.")]
     TooManyCredentialsError,
     /// Used for anything else.
-    #[error("Unexpected Error: {0}")]
+    #[error("Unexpected Error: {message}")]
-    UnexpectedError(String),
+    UnexpectedError { message: String },
 }
 
 /// Any string validation error such as Phone number validation or email, etc...
@@ -177,3 +187,20 @@ pub fn ser_with<S>(id: &sqlx::Error, s: S) -> Result<S::Ok, S::Error> where
     ser.serialize_entry("$oid", &id.to_string())?;
     ser.end()
 }
+
+pub trait VecRemove {
+    type T;
+    fn try_remove(&mut self, index: usize) -> Option<Self::T>;
+}
+
+impl<T> VecRemove for Vec<T> {
+    type T = T;
+
+    fn try_remove(&mut self, index: usize) -> Option<Self::T> {
+        if index < self.len() {
+            Some(self.remove(index))
+        } else {
+            None
+        }
+    }
+}

src/macros.rs

@@ -12,6 +12,20 @@ macro_rules! trace {
     };
 }
 
+/// Macro used to generate the trace object, must be called from the place where it originates, don't call from another function.
+#[allow(unused_macros)]
+#[macro_export]
+macro_rules! test_trace {
+    () => {
+        crate::Trace {
+            line: line!(),
+            function: crate::function_name!().into(),
+            file: file!().into(),
+            service: env!("CARGO_PKG_NAME").into(),
+        }
+    };
+}
+
 /// Macro used to 'unwrap' a result that returns a Error
 ///
 /// If there's an error returns the generated Error and push a trace on it.

src/tests.rs

@@ -0,0 +1,45 @@
+
+#[cfg(test)]
+mod tests {
+    use crate::{Error, ErrorType, ServiceError, test_trace};
+
+    #[test]
+    fn print_json() {
+        let error = Error::new(test_trace!())
+            .message("Hi there g")
+            .push_trace(test_trace!())
+            .key(Some("This key"))
+            .push_error(
+                Error::new(test_trace!())
+                    .error_type(ErrorType::Service { error: ServiceError::AlreadyExistsError { message: String::from("Hey now") } })
+                    .message("Hi there g")
+                    .push_trace(test_trace!())
+                    .key(Some("key for nested err"))
+            );
+        println!("Object in rust: {:#?}", error);
+        println!("");
+        println!("#############################################");
+        println!("");
+        println!("Object in json: {}", serde_json::to_string_pretty(&error).unwrap())
+    }
+
+    #[test]
+    fn print_json_with_db_error_variant() {
+        let error = Error::new(test_trace!())
+            .message("Hi there g")
+            .push_trace(test_trace!())
+            .key(Some("This key"))
+            .push_error(
+                Error::new(test_trace!())
+                    .error_type(ErrorType::Service { error: ServiceError::DatabaseError { error: sqlx::Error::Protocol("AAAA".into()) } })
+                    .message("Hi there g")
+                    .push_trace(test_trace!())
+                    .key(Some("key for nested err"))
+            );
+        println!("Object in rust: {:#?}", error);
+        println!("");
+        println!("#############################################");
+        println!("");
+        println!("Object in json: {}", serde_json::to_string_pretty(&error).unwrap())
+    }
+}