feat: ✨ error type and input check

src/error.rs

@@ -0,0 +1,28 @@
+use serde::{Deserialize, Serialize};
+
+#[derive(Debug, Serialize, Deserialize)]
+pub enum ForumInputError {
+    ForbiddenCharacter,
+    ForbiddenString,
+    EmptyParameter,
+}
+
+impl std::fmt::Display for ForumInputError {
+    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+        match self {
+            &ForumInputError::ForbiddenCharacter => {
+                write!(f, "Forbidden Character Detected")
+            }
+            &ForumInputError::ForbiddenString => {
+                write!(f, "Forbidden String Detected")
+            }
+            &ForumInputError::EmptyParameter => write!(f, "Parameter is Empty"),
+        }
+    }
+}
+
+impl std::error::Error for ForumInputError {
+    fn cause(&self) -> Option<&dyn std::error::Error> {
+        self.source()
+    }
+}

src/lib.rs

@@ -1,4 +1,5 @@
 pub mod database;
+pub mod error;
 pub mod feature;
 pub mod utils;
 

src/utils.rs

@@ -1,5 +1,7 @@
 use std::{fs::File, io::Read};
 
+use crate::error::ForumInputError;
+
 pub fn naive_toml_parser(file_location: &str) -> (String, Vec<String>) {
     let mut toml_file = File::open(file_location).unwrap();
     let mut toml_ingredients = String::default();
@@ -22,3 +24,16 @@ pub fn naive_toml_parser(file_location: &str) -> (String, Vec<String>) {
 
     (header, parsed)
 }
+
+pub fn input_checker(input: &String) -> Result<String, ForumInputError> {
+    if input.is_empty() {
+        Err(ForumInputError::EmptyParameter)
+    } else {
+        let input_without_space = input.split(' ').collect::<Vec<_>>().join("");
+        if input_without_space.chars().all(char::is_alphanumeric) {
+            Ok(input.to_owned())
+        } else {
+            Err(ForumInputError::ForbiddenCharacter)
+        }
+    }
+}