Cargo.toml

@@ -13,7 +13,7 @@ repository = "https://github.com/franklinblanco/err.git"
 [dependencies]
 serde = { version = "1.0", features = ["derive"] }
 thiserror = "1.0.48"
-sqlx = { version = "0.8", features = ["json"] }
+sqlx = { version = "0.7", features = ["json"] }
 stdext = "0.3.1"
 
 [dev-dependencies]

src/lib.rs

@@ -1,7 +1,10 @@
 mod macros;
+mod tests;
 
 use std::fmt::Display;
-use serde::{Serialize, Deserialize};
+use serde::{Serialize, Deserialize, Serializer};
+use serde::ser::SerializeMap;
+use thiserror::Error;
 
 pub use stdext::function_name;
 
@@ -22,6 +25,51 @@ impl Trace {
 #[derive(Serialize, Deserialize, Debug, Clone, PartialEq, Eq, PartialOrd, Ord)]
 pub struct Traces { pub traces: Vec<Trace> }
 
+
+#[derive(Serialize, Debug, Error)]
+#[error("MessageResource: {message_resource} ErrorType: {error_type} Trace: {trace:#?}")]
+pub struct Error {
+    pub trace: Traces,
+    #[serde(rename = "messageResource")]
+    pub message_resource: MessageResource,
+    #[serde(rename = "errorType")]
+    pub error_type: ErrorType,
+}
+
+impl Error {
+    pub fn new(trace: Trace) -> Self {
+        Self {
+            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.traces.push(trace);
+        self
+    }
+    
+    pub fn push_error(mut self, error: Error) -> Self {
+        self.error_type = ErrorType::Nested { nested: Box::new(error) };
+        self
+    }
+    pub fn key(mut self, key: Option<impl ToString>) -> Self {
+        self.message_resource.key = match key {
+            None => None,
+            Some(key) => Some(key.to_string()),
+        };
+        self
+    }
+    pub fn message(mut self, message: impl ToString) -> Self {
+        self.message_resource.message = message.to_string();
+        self
+    }
+    pub fn error_type(mut self, error_type: ErrorType) -> Self {
+        self.error_type = error_type;
+        self
+    }
+}
+
 /// This is for sending errors back from requests conveniently.
 /// This struct contains an optional key just in 
 /// case you want to deal with internationalization.
@@ -62,6 +110,83 @@ impl Default for MessageResource{
         Self { key: None, message: "".to_string() }
     }
 }
+/// This is supposed to be used whenever you have an error in your code and want to be more specific about it. 
+/// Fits in with most CRUD web apps. What you send back to the client is a MessageResource, not the error itself!
+#[derive(Serialize, Debug, Error)]
+pub enum ErrorType {
+    #[error("Network Error")]
+    Network,
+    #[error("IO error")]
+    IO,
+    #[error("Privilege Error")]
+    Privilege,
+    #[error("Unexpected Status Code. Expected: {expected} Actual: {actual}")]
+    UnexpectedStatusCode { expected: u16, actual: u16 },
+    #[error("Serde Error. Attempted to Serialize/Deserialize String: {text}")]
+    Serde { text: String },
+    #[error("Parsing error.")]
+    Parser,
+    #[error("Service Error: {error}")]
+    Service { error: ServiceError },
+    #[error("Unspecified Error")]
+    Unspecified,
+    #[error("Unexpected Error: {message}")]
+    Unexpected { message: String },
+    #[error("Nested Error: {nested}")]
+    Nested { nested: Box<Error> },
+}
+
+#[derive(Error, Serialize, Debug)]
+pub enum ServiceError {
+    /// Used to return a simple error from FromStr implementations.
+    #[error("Error parsing string into value")]
+    FromStrError,
+    /// Every error that is returned from a DAO operation.
+    #[error("Error from the Database: {error}")]
+    #[serde(serialize_with = "ser_with")]
+    DatabaseError {
+        #[from] 
+        error: sqlx::Error
+    },
+    /// A vec of ValidationErrors
+    #[error("Error Operation Not Allowed: {message}")]
+    NotAllowed { message: String },
+    #[error("Validation Errors: {errors:?}")]
+    ValidationErrors { errors: Vec<ValidationError> },
+    /// Something already exists. That something should be {0}
+    /// Example: "User" "Credential"
+    #[error("Error {message} Already exists.")]
+    AlreadyExistsError { message: String },
+    /// Example: "User with id X"
+    #[error("{message} Not found.")]
+    NotFoundError { message: String },
+    /// Used to specify authentication error.
+    /// Example: Password incorrect for user
+    #[error("Credential supplied is incorrect. {message}")]
+    IncorrectCredentialError { message: String },
+    #[error("Too many credentials supplied, maximum is 3.")]
+    TooManyCredentialsError,
+    /// Used for anything else.
+    #[error("Unexpected Error: {message}")]
+    UnexpectedError { message: String },
+}
+
+/// Any string validation error such as Phone number validation or email, etc...
+/// Reason should be a Key for internationalization
+#[derive(Serialize, Deserialize, Debug, Clone, PartialEq, Eq, PartialOrd, Ord, Error)]
+#[error("Error validating `{what}`. Reason: {reason}")]
+pub struct ValidationError {
+    pub what: String,
+    pub reason: String,
+}
+
+pub fn ser_with<S>(id: &sqlx::Error, s: S) -> Result<S::Ok, S::Error> where
+    S: Serializer,
+{
+    let mut ser = s.serialize_map(Some(1))?;
+    ser.serialize_entry("$oid", &id.to_string())?;
+    ser.end()
+}
 
 pub trait VecRemove {
     type T;

src/macros.rs

@@ -24,4 +24,46 @@ macro_rules! test_trace {
             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.
+#[allow(unused_macros)]
+#[macro_export]
+macro_rules! u_res_or_res {
+    ( $e:expr ) => {
+        match $e {
+            Ok(result) => result,
+            Err(mut error) => return Err(error.push_trace(err::trace!()))
+        }
+    };
+}
+
+/// 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.
+#[allow(unused_macros)]
+#[macro_export]
+macro_rules! x_u_res_or_res {
+    ( $e:expr, $t:expr ) => {
+        match $e {
+            Ok(result) => result,
+            Err(error) => return Err(err::Error::new(err::trace!()).message(error.to_string()).error_type($t))
+        }
+    };
+}
+
+/// 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.
+#[allow(unused_macros)]
+#[macro_export]
+macro_rules! x_u_res_db_or_res {
+    ( $e:expr ) => {
+        match $e {
+            Ok(result) => result,
+            Err(error) => return Err(err::Error::new(err::trace!()).message(error.to_string()).error_type(err::ErrorType::Service { error: err::ServiceError::DatabaseError{error: error} } ))
+        }
+    };
 }

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())
+    }
+}