Change generated project name to become /^(random_word)-[0-9a-zA-z]{6}$/

portal/src/util/projectname.test.ts

@@ -12,36 +12,35 @@ describe("maskNumber", () => {
 });
 
 describe("deterministicProjectName", () => {
-  it("deterministicProjectName(0) is 'abandon-abandon-0'", () => {
+  it("deterministicProjectName(0) should starts with 'abandon-' and ends with 6 alphanumeric characters", () => {
     // 0 is 0b00000000000_00000000000_0000000000
     // 0b00000000000 is abandon
-    // 0b0000000000 is 0
-    // So the name is abandon-abandon-0
-    expect(deterministicProjectName(0)).toEqual("abandon-abandon-0");
+    // So the name starts with abandon
+    expect(deterministicProjectName(0)).toMatch(/^abandon-[0-9A-Za-z]{6}$/);
   });
 
-  it("deterministicProjectName(1) is ''", () => {
+  it("deterministicProjectName(0) should starts with 'abandon-' and ends with 6 alphanumeric characters", () => {
     // 1 is 0b00000000000_00000000000_0000000001
     // 0b00000000000 is abandon
-    // 0b0000000001 is 1
-    // So the name is abandon-abandon-1
-    expect(deterministicProjectName(1)).toEqual("abandon-abandon-1");
+    // So the name starts with abandon
+    expect(deterministicProjectName(1)).toMatch(/^abandon-[0-9A-Za-z]{6}$/);
   });
 
-  it("deterministicProjectName(87878787) is ''", () => {
+  it("deterministicProjectName(87878787) should starts with 'ahead' and ends with 6 alphanumeric characters", () => {
     // 87878787 is 0b00000101001_11100111011_0010000011
     // 0b00000101001 is ahead
-    // 0b11100111011 is trash
-    // 0b0010000011 is 131
-    // So the name is ahead-trash-131
-    expect(deterministicProjectName(87878787)).toEqual("ahead-trash-131");
+    // So the name starts with ahead
+    expect(deterministicProjectName(87878787)).toMatch(
+      /^ahead-[0-9A-Za-z]{6}$/
+    );
   });
 
-  it("deterministicProjectName(4294967295) is ''", () => {
+  it("deterministicProjectName(4294967295) should starts with 'zoo-' and ends with 6 alphanumeric characters", () => {
     // 4294967295 (2^32 - 1) is 0b11111111111_11111111111_1111111111
     // 0b11111111111 is zoo
-    // 0b1111111111 is 1023
-    // So the name is zoo-zoo-1023
-    expect(deterministicProjectName(4294967295)).toEqual("zoo-zoo-1023");
+    // So the name starts with zoo-
+    expect(deterministicProjectName(4294967295)).toMatch(
+      /^zoo-[0-9A-Za-z]{6}$/
+    );
   });
 });

portal/src/util/projectname.ts

@@ -1,6 +1,8 @@
 // ref https://github.com/bitcoinjs/bip39/blob/master/src/wordlists/english.json
 import * as wordlist from "./wordlist.json";
 
+const RANDOM_ALPHA_NUMERIC_STRING_LENGTH = 6;
+
 function determineWord(index: number): string {
   return wordlist[index];
 }
@@ -15,15 +17,26 @@ export function maskNumber(num: number, startAt: number, bits: number): number {
   return (num >> startAt) & ((1 << bits) - 1);
 }
 
+export function getRandomAlphaNumericString(len: number): string {
+  let result = "";
+  const chars =
+    "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789";
+  for (let i = 0; i < len; i++) {
+    result += chars.charAt(Math.floor(Math.random() * chars.length));
+  }
+  return result;
+}
+
 export function deterministicProjectName(num: number): string {
-  const randomNumber = maskNumber(num, 0, 10);
-  const secondRandomStringIndex = maskNumber(num, 10, 11);
   const firstRandomStringIndex = maskNumber(num, 21, 11);
 
   const firstRandomString = determineWord(firstRandomStringIndex);
-  const secondRandomString = determineWord(secondRandomStringIndex);
 
-  return `${firstRandomString}-${secondRandomString}-${randomNumber}`;
+  const randomAlphaNumericString = getRandomAlphaNumericString(
+    RANDOM_ALPHA_NUMERIC_STRING_LENGTH
+  );
+
+  return `${firstRandomString}-${randomAlphaNumericString}`;
 }
 
 export function randomProjectName(): string {