Final V2 Changes (#212)

* Redo dependencies, add rejection reasons, make notifications more readable

* Fix errors, add dependency route, finish PR

* Fix clippy errors

src/util/validate.rs

@@ -0,0 +1,55 @@
+use lazy_static::lazy_static;
+use regex::Regex;
+use validator::{ValidationErrors, ValidationErrorsKind};
+
+lazy_static! {
+    pub static ref RE_URL_SAFE: Regex = Regex::new(r#"^[a-zA-Z0-9!@$()`.+,_"-]*$"#).unwrap();
+}
+
+//TODO: In order to ensure readability, only the first error is printed, this may need to be expanded on in the future!
+pub fn validation_errors_to_string(errors: ValidationErrors, adder: Option<String>) -> String {
+    let mut output = String::new();
+
+    let map = errors.into_errors();
+
+    let key_option = map.keys().next().copied();
+
+    if let Some(field) = key_option {
+        if let Some(error) = map.get(field) {
+            return match error {
+                ValidationErrorsKind::Struct(errors) => {
+                    validation_errors_to_string(*errors.clone(), Some(format!("of item {}", field)))
+                }
+                ValidationErrorsKind::List(list) => {
+                    if let Some(errors) = list.get(&0) {
+                        output.push_str(&*validation_errors_to_string(
+                            *errors.clone(),
+                            Some(format!("of list {} with index 0", field)),
+                        ));
+                    }
+
+                    output
+                }
+                ValidationErrorsKind::Field(errors) => {
+                    if let Some(error) = errors.get(0) {
+                        if let Some(adder) = adder {
+                            output.push_str(&*format!(
+                                "Field {} {} failed validation with error {}",
+                                field, adder, error.code
+                            ));
+                        } else {
+                            output.push_str(&*format!(
+                                "Field {} failed validation with error {}",
+                                field, error.code
+                            ));
+                        }
+                    }
+
+                    output
+                }
+            };
+        }
+    }
+
+    "".to_string()
+}