forked from city-mobil/insecticide
/
rules.go
153 lines (132 loc) · 2.56 KB
/
rules.go
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package rules
import (
_ "embed"
"encoding/json"
"fmt"
"os"
"strconv"
)
type RedisVersion string
const (
RedisVersion6 RedisVersion = "6"
)
var data map[RedisVersion]Parameters
//go:embed rules.json
var rulesJson []byte
func init() {
data = make(map[RedisVersion]Parameters)
err := json.Unmarshal(rulesJson, &data)
if err != nil {
fmt.Println(err)
os.Exit(1)
}
}
type Condition string
const (
Equal Condition = "eq"
NotEqual Condition = "ne"
LessThan Condition = "lt"
GreaterThan Condition = "gt"
)
type Level string
const (
Ok Level = "ok"
Warn Level = "warning"
Critical Level = "critical"
Deprecated Level = "deprecated"
)
type Info struct {
Advice string `json:"advice"`
Reason string `json:"reason"`
Level Level `json:"level"`
}
func NewDefaultInfo() *Info {
return &Info{
Level: Ok,
}
}
type Rule struct {
Index uint8 `json:"index"`
Value string `json:"value"`
Required bool `json:"required"`
Info *Info `json:"info"`
Condition Condition `json:"condition"`
}
type Rules []*Rule
func (r *Rule) Check(args []string) *Info {
value := args[r.Index]
rvType := "string"
rValue, err := strconv.Atoi(r.Value)
if err == nil {
rvType = "int"
}
var info *Info
switch rvType {
case "int":
ivalue, err := strconv.Atoi(value)
if err != nil {
info = &Info{
Advice: "Use type integer",
Reason: fmt.Sprintf("Can not parse integer value: %s", err.Error()),
Level: Critical,
}
break
}
info = r.checkNumbers(ivalue, rValue)
case "string":
info = r.checkString(value, r.Value)
}
return info
}
func (r *Rule) checkString(lv, rv string) *Info {
info := NewDefaultInfo()
switch r.Condition {
case Equal:
if lv == rv {
info = r.Info
}
case NotEqual:
if lv != rv {
info = r.Info
}
default:
return &Info{
Advice: "Use correct condition: eq or ne",
Reason: fmt.Sprintf("unsupported condition: %s", r.Condition),
Level: Critical,
}
}
return info
}
func (r *Rule) checkNumbers(lv, rv int) *Info {
info := NewDefaultInfo()
switch r.Condition {
case Equal:
if lv == rv {
info = r.Info
}
case NotEqual:
if lv != rv {
info = r.Info
}
case LessThan:
if lv < rv {
info = r.Info
}
case GreaterThan:
if lv > rv {
info = r.Info
}
default:
return &Info{
Advice: "Use correct condition: eq, ne, lt or gt",
Reason: fmt.Sprintf("unsupported condition: %s", r.Condition),
Level: Critical,
}
}
return info
}
type Parameters map[string]Rules
func GetParameters(version RedisVersion) Parameters {
return data[version]
}