base64 encode/decode functions added for sake of usage simplicity

URL_SAFE encoding is used
Both functions seem to pass the tests as well

server/src/utils.rs

@@ -0,0 +1,30 @@
+// Generic functions used by pretty much everyone
+use base64::{encode_config, decode_config, URL_SAFE};
+use std::str;
+
+
+pub fn encode_param(raw: &str) -> String {
+    encode_config(raw, URL_SAFE)
+}
+
+pub fn decode_param(enc: &str) -> Result<String, i32> {
+    let bytes = decode_config(enc, URL_SAFE).unwrap();
+    let res = str::from_utf8(&bytes);
+    match res {
+        Ok(data) => Ok(data.into()),
+        Err(_e) => Err(1)
+    }
+}
+
+#[cfg(test)]
+mod encoder_decoder_tests {
+    use super::*;
+
+    #[test]
+    fn encode_decode() {
+        let raw = "some random bs";
+        let enc = encode_param(raw);
+        let dec = decode_param(&enc);
+        assert_eq!(raw, dec.unwrap());
+    }
+}