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Add support for custom validation rules

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This commit is contained in:
Nise Void 2019-04-26 10:33:41 +02:00
parent 922297b368
commit f79b7c6649
Signed by: NiseVoid
GPG key ID: FBA14AC83EA602F3
4 changed files with 54 additions and 20 deletions
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38
rules.go
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@ -6,17 +6,25 @@ import (
"strings"
)
type listFunc func(reflect.Value, interface{}) bool
// ValidationFunc is a function to validate a field
type ValidationFunc func(reflect.Value, interface{}) bool
// Kinds is a map with validation funcs for each reflect.Kind
type Kinds map[reflect.Kind]ValidationFunc
type listFuncInfo struct {
inputFunc func(reflect.Kind, string) interface{}
kinds _kinds
inputFunc InputFunc
kinds Kinds
}
type _kinds map[reflect.Kind]listFunc
// AddRule adds a rule to the list of validation functions
func AddRule(name string, inputFunc InputFunc, kinds Kinds) {
funcs[name] = listFuncInfo{inputFunc, kinds}
}
// nolint: dupl
var funcs = map[string]listFuncInfo{
`required`: {nil, _kinds{
`required`: {nil, Kinds{
reflect.Ptr: func(rv reflect.Value, _ interface{}) bool {
return !rv.IsNil()
},
@ -44,29 +52,29 @@ var funcs = map[string]listFuncInfo{
}},
// Strings
`prefix`: {inputSame, _kinds{
`prefix`: {InputSame, Kinds{
reflect.String: func(rv reflect.Value, val interface{}) bool {
return strings.HasPrefix(rv.String(), val.(string))
},
}},
`suffix`: {inputSame, _kinds{
`suffix`: {InputSame, Kinds{
reflect.String: func(rv reflect.Value, val interface{}) bool {
return strings.HasSuffix(rv.String(), val.(string))
},
}},
`contains`: {inputSame, _kinds{
`contains`: {InputSame, Kinds{
reflect.String: func(rv reflect.Value, val interface{}) bool {
return strings.Contains(rv.String(), val.(string))
},
}},
`regexp`: {inputRegexp, _kinds{
`regexp`: {InputRegexp, Kinds{
reflect.String: func(rv reflect.Value, val interface{}) bool {
return val.(*regexp.Regexp).MatchString(rv.String())
},
}},
// Comparisons
`eq`: {inputSame, _kinds{
`eq`: {InputSame, Kinds{
reflect.String: func(rv reflect.Value, val interface{}) bool {
return rv.String() == val.(string)
},
@ -82,7 +90,7 @@ var funcs = map[string]listFuncInfo{
}},
// Integers
`gt`: {inputSame, _kinds{
`gt`: {InputSame, Kinds{
reflect.Int: func(rv reflect.Value, val interface{}) bool {
return rv.Int() > val.(int64)
},
@ -93,7 +101,7 @@ var funcs = map[string]listFuncInfo{
return rv.Float() > val.(float64)
},
}},
`lt`: {inputSame, _kinds{
`lt`: {InputSame, Kinds{
reflect.Int: func(rv reflect.Value, val interface{}) bool {
return rv.Int() < val.(int64)
},
@ -106,7 +114,7 @@ var funcs = map[string]listFuncInfo{
}},
// Slices, maps & strings
`len`: {inputInt, _kinds{
`len`: {InputInt, Kinds{
reflect.Slice: func(rv reflect.Value, val interface{}) bool {
return rv.Len() == val.(int)
},
@ -117,7 +125,7 @@ var funcs = map[string]listFuncInfo{
return rv.Len() == val.(int)
},
}},
`min`: {inputInt, _kinds{
`min`: {InputInt, Kinds{
reflect.Slice: func(rv reflect.Value, val interface{}) bool {
return rv.Len() >= val.(int)
},
@ -128,7 +136,7 @@ var funcs = map[string]listFuncInfo{
return rv.Len() >= val.(int)
},
}},
`max`: {inputInt, _kinds{
`max`: {InputInt, Kinds{
reflect.Slice: func(rv reflect.Value, val interface{}) bool {
return rv.Len() <= val.(int)
},