initial commit

frontend/src/plugins/randomUtil.ts

@@ -0,0 +1,49 @@
+const seq = '0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ'.split('')
+
+const RandomUtil = {
+  randomIntRange(min: number, max: number): number {
+    return parseInt((Math.random() * (max - min) + min).toString(), 10)
+  },
+  randomInt(n: number) {
+    return this.randomIntRange(0, n)
+  },
+  randomSeq(count: number): string {
+    let str = ''
+    for (let i = 0; i < count; ++i) {
+        str += seq[this.randomInt(62)]
+    }
+    return str
+  },
+  randomLowerAndNum(count: number): string {
+    let str = ''
+    for (let i = 0; i < count; ++i) {
+        str += seq[this.randomInt(36)]
+    }
+    return str
+  },
+  randomUUID(): string {
+    let d = new Date().getTime()
+    return 'xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx'.replace(/[xy]/g, function (c) {
+        let r = (d + Math.random() * 16) % 16 | 0
+        d = Math.floor(d / 16)
+        return (c === 'x' ? r : (r & 0x7 | 0x8)).toString(16)
+    })
+  },
+  randomShadowsocksPassword(n: number): string {
+    const array = new Uint8Array(n)
+    window.crypto.getRandomValues(array)
+    return btoa(String.fromCharCode(...array))
+  },
+  randomShortId(): string[] {
+    let shortIds = ['','','','']
+    for (var ii = 0; ii < 4; ii++) {
+        for (var jj = 0; jj < this.randomInt(8); jj++){
+            let randomNum = this.randomInt(256)
+            shortIds[ii] += ('0' + randomNum.toString(16)).slice(-2)
+        }
+    }
+    return shortIds
+  }
+}
+
+export default RandomUtil