random bullshit

1 files changed, 117 insertions, 0 deletions

diff --git a/server/utils/aadhaar.js b/server/utils/aadhaar.js
new file mode 100644
index 0000000..cd81711
--- /dev/null
+++ b/server/utils/aadhaar.js
@@ -0,0 +1,117 @@
+import {ELEVEN_TIMES_NINE} from '../constants/aadhaar';
+
+// const generateCheckSumDigit = (randomNumberArray) => {
+//   const d = [
+//     [0, 1, 2, 3, 4, 5, 6, 7, 8, 9],
+//     [1, 2, 3, 4, 0, 6, 7, 8, 9, 5],
+//     [2, 3, 4, 0, 1, 7, 8, 9, 5, 6],
+//     [3, 4, 0, 1, 2, 8, 9, 5, 6, 7],
+//     [4, 0, 1, 2, 3, 9, 5, 6, 7, 8],
+//     [5, 9, 8, 7, 6, 0, 4, 3, 2, 1],
+//     [6, 5, 9, 8, 7, 1, 0, 4, 3, 2],
+//     [7, 6, 5, 9, 8, 2, 1, 0, 4, 3],
+//     [8, 7, 6, 5, 9, 3, 2, 1, 0, 4],
+//     [9, 8, 7, 6, 5, 4, 3, 2, 1, 0],
+//   ];
+
+//   const p = [
+//     [0, 1, 2, 3, 4, 5, 6, 7, 8, 9],
+//     [1, 5, 7, 6, 2, 8, 3, 0, 9, 4],
+//     [5, 8, 0, 3, 7, 9, 6, 1, 4, 2],
+//     [8, 9, 1, 6, 0, 4, 3, 5, 2, 7],
+//     [9, 4, 5, 3, 1, 2, 6, 8, 7, 0],
+//     [4, 2, 8, 6, 5, 7, 3, 9, 0, 1],
+//     [2, 7, 9, 3, 8, 0, 6, 4, 1, 5],
+//     [7, 0, 4, 6, 9, 1, 3, 2, 5, 8],
+//   ];
+
+//   const inv = [0, 4, 3, 2, 1, 5, 6, 7, 8, 9];
+
+//   let c = 0;
+//   for (let i = 0; i < randomNumberArray.length; i++) {
+//     c = d[c][p[(i + 1) % 8][randomNumberArray[i]]];
+//   }
+//   return inv[c];
+// };
+
+// const generateAadhaar = () => {
+//   const aadhaarNumberArray = [];
+//   let randomNumber = Math.floor(Math.random() * ELEVEN_TIMES_NINE + 1);
+
+//   while (randomNumber != 0) {
+//     const digit = randomNumber % 10;
+//     aadhaarNumberArray.push(digit);
+//     randomNumber = Math.floor(randomNumber / 10);
+//   }
+
+//   const checkSumDigit = generateCheckSumDigit(aadhaarNumberArray);
+//   aadhaarNumberArray.reverse();
+//   aadhaarNumberArray.push(checkSumDigit);
+//   let aadhaarNumber = 0;
+//   aadhaarNumberArray.forEach((value, index) => {
+//     aadhaarNumber = aadhaarNumber + value;
+//     if (index !== aadhaarNumberArray.length - 1) {
+//       aadhaarNumber = aadhaarNumber * 10;
+//     }
+//   });
+
+//   return aadhaarNumber;
+// };
+
+function generate(array) {
+  const d = [
+    [0, 1, 2, 3, 4, 5, 6, 7, 8, 9],
+    [1, 2, 3, 4, 0, 6, 7, 8, 9, 5],
+    [2, 3, 4, 0, 1, 7, 8, 9, 5, 6],
+    [3, 4, 0, 1, 2, 8, 9, 5, 6, 7],
+    [4, 0, 1, 2, 3, 9, 5, 6, 7, 8],
+    [5, 9, 8, 7, 6, 0, 4, 3, 2, 1],
+    [6, 5, 9, 8, 7, 1, 0, 4, 3, 2],
+    [7, 6, 5, 9, 8, 2, 1, 0, 4, 3],
+    [8, 7, 6, 5, 9, 3, 2, 1, 0, 4],
+    [9, 8, 7, 6, 5, 4, 3, 2, 1, 0],
+  ];
+
+  const p = [
+    [0, 1, 2, 3, 4, 5, 6, 7, 8, 9],
+    [1, 5, 7, 6, 2, 8, 3, 0, 9, 4],
+    [5, 8, 0, 3, 7, 9, 6, 1, 4, 2],
+    [8, 9, 1, 6, 0, 4, 3, 5, 2, 7],
+    [9, 4, 5, 3, 1, 2, 6, 8, 7, 0],
+    [4, 2, 8, 6, 5, 7, 3, 9, 0, 1],
+    [2, 7, 9, 3, 8, 0, 6, 4, 1, 5],
+    [7, 0, 4, 6, 9, 1, 3, 2, 5, 8],
+  ];
+  const inv = [0, 4, 3, 2, 1, 5, 6, 7, 8, 9];
+
+  let c = 0;
+  for (let i = 0; i < array.length; i++) {
+    c = d[c][p[(i + 1) % 8][array[i]]];
+  }
+  return inv[c];
+}
+
+function generateAadhaar() {
+  const aadhaarArray = [];
+  let x = Math.floor(Math.random() * ELEVEN_TIMES_NINE + 1);
+
+  while (x != 0) {
+    const digit = x % 10;
+    aadhaarArray.push(digit);
+    x = Math.floor(x / 10);
+  }
+  const last_digit = generate(aadhaarArray);
+  aadhaarArray.reverse();
+  aadhaarArray.push(last_digit);
+  let ans = 0;
+  aadhaarArray.forEach((value, index) => {
+    ans = ans + value;
+    if (index !== aadhaarArray.length - 1) {
+      ans = ans * 10;
+    }
+  });
+
+  return ans;
+}
+
+export default generateAadhaar;