feat: block2poly working

fix: for loops boundries

src/tasks/tasks01/block2poly.rs

@@ -1,7 +1,52 @@
+use std::str::Bytes;
+
 use crate::utils::poly;
 use base64::prelude::*;
 
-fn block2poly(block: String) {
-    let num_block: u128 = BASE64_STANDARD.decode(block).unwrap().into();
-    let coefficients = poly::get_bit_indices_from_byte();
+fn block2poly(block: &str) -> Vec<u8> {
+    // Convert JSON data in to a u128
+    let decoded: Vec<u8> = BASE64_STANDARD.decode(block).unwrap();
+    let mut bytes: [u8; 16] = [0u8; 16];
+    bytes.copy_from_slice(&decoded);
+    let number: u128 = <u128>::from_ne_bytes(bytes);
+
+    let mut coefficients: Vec<u8> = vec![];
+
+    for shift in 0..128 {
+        //println!("{:?}", ((num >> shift) & 1));
+        if (((number >> shift) & 1) == 1) {
+            println!("Shift success");
+            coefficients.push(shift);
+        }
+    }
+
+    //Legacy code. 
+    // TODO: Remove
+    /*
+    let mut counter: u8 = 0;
+    let mut coefficients: Vec<u8> = vec![];
+    for blk in decoded {
+        let indices: Vec<u8> = poly::get_bit_indices_from_byte(blk);
+        for index in indices {
+            coefficients.push(counter*8+index);
+        }
+        counter += 1;
+    }
+    */
+    coefficients
+}
+
+#[cfg(test)]
+mod tests {
+    use std::str::FromStr;
+
+    // Note this useful idiom: importing names from outer (for mod tests) scope.
+    use super::*;
+
+    #[test]
+    fn block2poly_task01() {
+        let block: &str = "ARIAAAAAAAAAAAAAAAAAgA==";
+        let coefficients: Vec<u8> = vec![0, 9, 12, 127];
+        assert_eq!(block2poly(block), coefficients);
+    }
 }