refactor: 后端包结构重构、去除无用的文件

server/pkg/utils/assert/assert.go

@@ -0,0 +1,21 @@
+package assert
+
+import "fmt"
+
+// 断言条件为真，不满足的panic
+func IsTrue(condition bool, panicMsg string, params ...interface{}) {
+	if !condition {
+		if len(params) != 0 {
+			panic(fmt.Sprintf(panicMsg, params...))
+		}
+		panic(panicMsg)
+	}
+}
+
+func State(condition bool, panicMsg string, params ...interface{}) {
+	IsTrue(condition, panicMsg, params...)
+}
+
+func NotEmpty(str string, panicMsg string, params ...interface{}) {
+	IsTrue(str != "", panicMsg, params...)
+}