394 lines
9.9 KiB
Go
394 lines
9.9 KiB
Go
package boil
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import (
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"reflect"
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"regexp"
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"sort"
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"strconv"
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"sync/atomic"
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"time"
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null "gopkg.in/nullbio/null.v4"
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"github.com/pkg/errors"
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"github.com/satori/go.uuid"
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"github.com/vattle/sqlboiler/strmangle"
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)
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var (
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typeNullFloat32 = reflect.TypeOf(null.Float32{})
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typeNullFloat64 = reflect.TypeOf(null.Float64{})
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typeNullInt = reflect.TypeOf(null.Int{})
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typeNullInt8 = reflect.TypeOf(null.Int8{})
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typeNullInt16 = reflect.TypeOf(null.Int16{})
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typeNullInt32 = reflect.TypeOf(null.Int32{})
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typeNullInt64 = reflect.TypeOf(null.Int64{})
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typeNullUint = reflect.TypeOf(null.Uint{})
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typeNullUint8 = reflect.TypeOf(null.Uint8{})
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typeNullUint16 = reflect.TypeOf(null.Uint16{})
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typeNullUint32 = reflect.TypeOf(null.Uint32{})
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typeNullUint64 = reflect.TypeOf(null.Uint64{})
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typeNullString = reflect.TypeOf(null.String{})
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typeNullBool = reflect.TypeOf(null.Bool{})
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typeNullTime = reflect.TypeOf(null.Time{})
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typeTime = reflect.TypeOf(time.Time{})
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rgxValidTime = regexp.MustCompile(`[2-9]+`)
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validatedTypes = []string{"uuid", "interval"}
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)
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// Seed is an atomic counter for pseudo-randomization structs. Using full
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// randomization leads to collisions in a domain where uniqueness is an
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// important factor.
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type Seed int64
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// NewSeed creates a new seed for pseudo-randomization.
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func NewSeed() *Seed {
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s := new(int64)
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*s = time.Now().Unix()
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return (*Seed)(s)
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}
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func (s *Seed) nextInt() int {
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return int(atomic.AddInt64((*int64)(s), 1))
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}
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// RandomizeStruct takes an object and fills it with random data.
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// It will ignore the fields in the blacklist.
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func (s *Seed) RandomizeStruct(str interface{}, colTypes map[string]string, canBeNull bool, blacklist ...string) error {
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// Don't modify blacklist
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copyBlacklist := make([]string, len(blacklist))
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copy(copyBlacklist, blacklist)
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blacklist = copyBlacklist
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sort.Strings(blacklist)
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// Check if it's pointer
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value := reflect.ValueOf(str)
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kind := value.Kind()
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if kind != reflect.Ptr {
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return errors.Errorf("Outer element should be a pointer, given a non-pointer: %T", str)
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}
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// Check if it's a struct
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value = value.Elem()
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kind = value.Kind()
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if kind != reflect.Struct {
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return errors.Errorf("Inner element should be a struct, given a non-struct: %T", str)
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}
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typ := value.Type()
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nFields := value.NumField()
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// Iterate through fields, randomizing
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for i := 0; i < nFields; i++ {
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fieldVal := value.Field(i)
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fieldTyp := typ.Field(i)
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var found bool
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for _, v := range blacklist {
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if strmangle.TitleCase(v) == fieldTyp.Name {
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found = true
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break
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}
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}
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if found {
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continue
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}
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fieldDBType := colTypes[fieldTyp.Name]
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if err := s.randomizeField(fieldVal, fieldDBType, canBeNull); err != nil {
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return err
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}
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}
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return nil
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}
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// randDate generates a random time.Time between 1850 and 2050.
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// Only the Day/Month/Year columns are set so that Dates and DateTimes do
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// not cause mismatches in the test data comparisons.
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func (s *Seed) randDate() time.Time {
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t := time.Date(
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1850+s.nextInt()%160,
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time.Month(1+(s.nextInt()%12)),
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1+(s.nextInt()%25),
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0,
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0,
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0,
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0,
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time.UTC,
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)
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return t
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}
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// randomizeField changes the value at field to a "randomized" value.
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//
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// If canBeNull is false:
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// The value will always be a non-null and non-zero value.
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// If canBeNull is true:
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// The value has the possibility of being null or non-zero at random.
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func (s *Seed) randomizeField(field reflect.Value, fieldType string, canBeNull bool) error {
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kind := field.Kind()
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typ := field.Type()
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var value interface{}
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var isNull bool
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// Validated columns always need to be set regardless of canBeNull,
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// and they have to adhere to a strict value format.
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foundValidated := strmangle.SetInclude(fieldType, validatedTypes)
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if foundValidated {
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if kind == reflect.Struct {
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switch typ {
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case typeNullString:
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if fieldType == "interval" {
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value = null.NewString(strconv.Itoa((s.nextInt()%26)+2)+" days", true)
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field.Set(reflect.ValueOf(value))
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return nil
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}
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if fieldType == "uuid" {
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value = null.NewString(uuid.NewV4().String(), true)
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field.Set(reflect.ValueOf(value))
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return nil
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}
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}
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} else {
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switch kind {
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case reflect.String:
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if fieldType == "interval" {
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value = strconv.Itoa((s.nextInt()%26)+2) + " days"
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field.Set(reflect.ValueOf(value))
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return nil
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}
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if fieldType == "uuid" {
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value = uuid.NewV4().String()
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field.Set(reflect.ValueOf(value))
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return nil
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}
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}
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}
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}
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// Check the regular columns, these can be set or not set
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// depending on the canBeNull flag.
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if canBeNull {
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// 1 in 3 chance of being null or zero value
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isNull = s.nextInt()%3 == 0
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} else {
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// if canBeNull is false, then never return null values.
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isNull = false
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}
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// Retrieve the value to be returned
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if kind == reflect.Struct {
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if isNull {
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value = getStructNullValue(typ)
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} else {
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value = s.getStructRandValue(typ)
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}
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} else {
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if isNull {
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value = getVariableNullValue(kind)
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} else {
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value = s.getVariableRandValue(kind, typ)
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}
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}
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if value == nil {
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return errors.Errorf("unsupported type: %T", typ.String())
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}
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field.Set(reflect.ValueOf(value))
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return nil
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}
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// getStructNullValue for the matching type.
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func getStructNullValue(typ reflect.Type) interface{} {
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switch typ {
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case typeTime:
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return time.Time{}
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case typeNullBool:
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return null.NewBool(false, false)
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case typeNullString:
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return null.NewString("", false)
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case typeNullTime:
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return null.NewTime(time.Time{}, false)
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case typeNullFloat32:
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return null.NewFloat32(0.0, false)
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case typeNullFloat64:
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return null.NewFloat64(0.0, false)
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case typeNullInt:
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return null.NewInt(0, false)
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case typeNullInt8:
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return null.NewInt8(0, false)
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case typeNullInt16:
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return null.NewInt16(0, false)
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case typeNullInt32:
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return null.NewInt32(0, false)
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case typeNullInt64:
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return null.NewInt64(0, false)
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case typeNullUint:
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return null.NewUint(0, false)
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case typeNullUint8:
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return null.NewUint8(0, false)
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case typeNullUint16:
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return null.NewUint16(0, false)
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case typeNullUint32:
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return null.NewUint32(0, false)
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case typeNullUint64:
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return null.NewUint64(0, false)
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}
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return nil
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}
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// getStructRandValue returns a "random" value for the matching type.
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// The randomness is really an incrementation of the global seed,
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// this is done to avoid duplicate key violations.
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func (s *Seed) getStructRandValue(typ reflect.Type) interface{} {
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switch typ {
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case typeTime:
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return s.randDate()
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case typeNullBool:
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return null.NewBool(s.nextInt()%2 == 0, true)
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case typeNullString:
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return null.NewString(s.randStr(1), true)
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case typeNullTime:
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return null.NewTime(s.randDate(), true)
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case typeNullFloat32:
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return null.NewFloat32(float32(s.nextInt()%10)/10.0+float32(s.nextInt()%10), true)
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case typeNullFloat64:
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return null.NewFloat64(float64(s.nextInt()%10)/10.0+float64(s.nextInt()%10), true)
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case typeNullInt:
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return null.NewInt(s.nextInt(), true)
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case typeNullInt8:
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return null.NewInt8(int8(s.nextInt()), true)
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case typeNullInt16:
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return null.NewInt16(int16(s.nextInt()), true)
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case typeNullInt32:
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return null.NewInt32(int32(s.nextInt()), true)
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case typeNullInt64:
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return null.NewInt64(int64(s.nextInt()), true)
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case typeNullUint:
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return null.NewUint(uint(s.nextInt()), true)
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case typeNullUint8:
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return null.NewUint8(uint8(s.nextInt()), true)
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case typeNullUint16:
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return null.NewUint16(uint16(s.nextInt()), true)
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case typeNullUint32:
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return null.NewUint32(uint32(s.nextInt()), true)
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case typeNullUint64:
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return null.NewUint64(uint64(s.nextInt()), true)
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}
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return nil
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}
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// getVariableNullValue for the matching type.
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func getVariableNullValue(kind reflect.Kind) interface{} {
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switch kind {
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case reflect.Float32:
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return float32(0)
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case reflect.Float64:
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return float64(0)
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case reflect.Int:
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return int(0)
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case reflect.Int8:
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return int8(0)
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case reflect.Int16:
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return int16(0)
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case reflect.Int32:
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return int32(0)
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case reflect.Int64:
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return int64(0)
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case reflect.Uint:
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return uint(0)
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case reflect.Uint8:
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return uint8(0)
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case reflect.Uint16:
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return uint16(0)
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case reflect.Uint32:
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return uint32(0)
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case reflect.Uint64:
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return uint64(0)
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case reflect.Bool:
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return false
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case reflect.String:
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return ""
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case reflect.Slice:
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return []byte(nil)
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}
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return nil
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}
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// getVariableRandValue returns a "random" value for the matching kind.
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// The randomness is really an incrementation of the global seed,
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// this is done to avoid duplicate key violations.
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func (s *Seed) getVariableRandValue(kind reflect.Kind, typ reflect.Type) interface{} {
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switch kind {
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case reflect.Float32:
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return float32(float32(s.nextInt()%10)/10.0 + float32(s.nextInt()%10))
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case reflect.Float64:
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return float64(float64(s.nextInt()%10)/10.0 + float64(s.nextInt()%10))
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case reflect.Int:
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return s.nextInt()
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case reflect.Int8:
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return int8(s.nextInt())
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case reflect.Int16:
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return int16(s.nextInt())
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case reflect.Int32:
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return int32(s.nextInt())
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case reflect.Int64:
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return int64(s.nextInt())
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case reflect.Uint:
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return uint(s.nextInt())
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case reflect.Uint8:
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return uint8(s.nextInt())
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case reflect.Uint16:
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return uint16(s.nextInt())
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case reflect.Uint32:
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return uint32(s.nextInt())
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case reflect.Uint64:
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return uint64(s.nextInt())
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case reflect.Bool:
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return true
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case reflect.String:
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return s.randStr(1)
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case reflect.Slice:
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sliceVal := typ.Elem()
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if sliceVal.Kind() != reflect.Uint8 {
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return errors.Errorf("unsupported slice type: %T, was expecting byte slice.", typ.String())
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}
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return s.randByteSlice(5 + s.nextInt()%20)
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}
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return nil
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}
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const alphabet = "0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ"
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func (s *Seed) randStr(ln int) string {
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str := make([]byte, ln)
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for i := 0; i < ln; i++ {
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str[i] = byte(alphabet[s.nextInt()%len(alphabet)])
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}
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return string(str)
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}
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func (s *Seed) randByteSlice(ln int) []byte {
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str := make([]byte, ln)
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for i := 0; i < ln; i++ {
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str[i] = byte(s.nextInt() % 256)
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}
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return str
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}
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