🎉

tool/random.go

@@ -0,0 +1,75 @@
+package tool
+
+import (
+	"crypto/rand"
+	"math/big"
+	mrand "math/rand"
+)
+
+var (
+	letters    = []byte("0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ")
+	letterNum  = []byte("0123456789")
+	letterLow  = []byte("abcdefghijklmnopqrstuvwxyz")
+	letterCap  = []byte("ABCDEFGHIJKLMNOPQRSTUVWXYZ")
+	letterSyb  = []byte("!@#$%^&*()_+-=")
+	adjectives = []string{
+		"开心的", "灿烂的", "温暖的", "阳光的", "活泼的",
+		"聪明的", "优雅的", "幸运的", "甜蜜的", "勇敢的",
+		"宁静的", "热情的", "温柔的", "幽默的", "坚强的",
+		"迷人的", "神奇的", "快乐的", "健康的", "自由的",
+		"梦幻的", "勤劳的", "真诚的", "浪漫的", "自信的",
+	}
+
+	plants = []string{
+		"苹果", "香蕉", "橘子", "葡萄", "草莓",
+		"西瓜", "樱桃", "菠萝", "柠檬", "蜜桃",
+		"蓝莓", "芒果", "石榴", "甜瓜", "雪梨",
+		"番茄", "南瓜", "土豆", "青椒", "洋葱",
+		"黄瓜", "萝卜", "豌豆", "玉米", "蘑菇",
+		"菠菜", "茄子", "芹菜", "莲藕", "西兰花",
+	}
+)
+
+func RandomInt(max int64) int64 {
+	num, _ := rand.Int(rand.Reader, big.NewInt(max))
+	return num.Int64()
+}
+
+func RandomString(length int) string {
+	result := make([]byte, length)
+	for i := 0; i < length; i++ {
+		num, _ := rand.Int(rand.Reader, big.NewInt(int64(len(letters))))
+		result[i] = letters[num.Int64()]
+	}
+	return string(result)
+}
+
+func RandomPassword(length int, withSymbol bool) string {
+	result := make([]byte, length)
+	kind := 3
+	if withSymbol {
+		kind++
+	}
+
+	for i := 0; i < length; i++ {
+		switch i % kind {
+		case 0:
+			num, _ := rand.Int(rand.Reader, big.NewInt(int64(len(letterNum))))
+			result[i] = letterNum[num.Int64()]
+		case 1:
+			num, _ := rand.Int(rand.Reader, big.NewInt(int64(len(letterLow))))
+			result[i] = letterLow[num.Int64()]
+		case 2:
+			num, _ := rand.Int(rand.Reader, big.NewInt(int64(len(letterCap))))
+			result[i] = letterCap[num.Int64()]
+		case 3:
+			num, _ := rand.Int(rand.Reader, big.NewInt(int64(len(letterSyb))))
+			result[i] = letterSyb[num.Int64()]
+		}
+	}
+	return string(result)
+}
+
+func RandomName() string {
+	return adjectives[mrand.Intn(len(adjectives))] + plants[mrand.Intn(len(plants))]
+}