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helpers.go
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/
helpers.go
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package pqtgo
import (
"fmt"
"go/types"
"io"
"reflect"
"sort"
"strings"
"github.com/huandu/xstrings"
"github.com/piotrkowalczuk/pqt"
)
func generateTypeBuiltin(t BuiltinType, m int32) (r string) {
switch types.BasicKind(t) {
case types.Bool:
r = chooseType("bool", "*bool", "*bool", m)
case types.Int:
r = chooseType("int", "*int", "*int", m)
case types.Int8:
r = chooseType("int8", "*int8", "*int8", m)
case types.Int16:
r = chooseType("int16", "*int16", "*int16", m)
case types.Int32:
r = chooseType("int32", "*int32", "*int32", m)
case types.Int64:
r = chooseType("int64", "*int64", "*int64", m)
case types.Uint:
r = chooseType("uint", "*uint", "*uint", m)
case types.Uint8:
r = chooseType("uint8", "*uint8", "*uint8", m)
case types.Uint16:
r = chooseType("uint16", "*uint16", "*uint16", m)
case types.Uint32:
r = chooseType("uint32", "*uint32", "*uint32", m)
case types.Uint64:
r = chooseType("uint64", "*uint64", "*uint64", m)
case types.Float32:
r = chooseType("float32", "*float32", "*float32", m)
case types.Float64:
r = chooseType("float64", "*float64", "*float64", m)
case types.Complex64:
r = chooseType("complex64", "*complex64", "*complex64", m)
case types.Complex128:
r = chooseType("complex128", "*complex128", "*complex128", m)
case types.String:
r = chooseType("string", "*string", "*string", m)
default:
r = "invalid"
}
return
}
func generateTypeBase(t pqt.Type, m int32) string {
switch t {
case pqt.TypeText():
return chooseType("string", "sql.NullString", "sql.NullString", m)
case pqt.TypeBool():
return chooseType("bool", "sql.NullBool", "sql.NullBool", m)
case pqt.TypeIntegerSmall():
return chooseType("int16", "*int16", "*int16", m)
case pqt.TypeInteger():
return chooseType("int32", "*int32", "*int32", m)
case pqt.TypeIntegerBig():
return chooseType("int64", "sql.NullInt64", "sql.NullInt64", m)
case pqt.TypeSerial():
return chooseType("int32", "*int32", "*int32", m)
case pqt.TypeSerialSmall():
return chooseType("int16", "*int16", "*int16", m)
case pqt.TypeSerialBig():
return chooseType("int64", "sql.NullInt64", "sql.NullInt64", m)
case pqt.TypeTimestamp(), pqt.TypeTimestampTZ():
return chooseType("time.Time", "pq.NullTime", "pq.NullTime", m)
case pqt.TypeReal():
return chooseType("float32", "*float32", "*float32", m)
case pqt.TypeDoublePrecision():
return chooseType("float64", "sql.NullFloat64", "sql.NullFloat64", m)
case pqt.TypeBytea(), pqt.TypeJSON(), pqt.TypeJSONB():
return "[]byte"
case pqt.TypeUUID():
return chooseType("string", "sql.NullString", "sql.NullString", m)
default:
gt := t.String()
switch {
case strings.HasPrefix(gt, "SMALLINT["), strings.HasPrefix(gt, "INTEGER["), strings.HasPrefix(gt, "BIGINT["):
return chooseType("pq.Int64Array", "NullInt64Array", "NullInt64Array", m)
case strings.HasPrefix(gt, "DOUBLE PRECISION["):
return chooseType("pq.Float64Array", "NullFloat64Array", "NullFloat64Array", m)
case strings.HasPrefix(gt, "TEXT["):
return chooseType("pq.StringArray", "NullStringArray", "NullStringArray", m)
case strings.HasPrefix(gt, "DECIMAL"), strings.HasPrefix(gt, "NUMERIC"):
return chooseType("float64", "sql.NullFloat64", "sql.NullFloat64", m)
case strings.HasPrefix(gt, "VARCHAR"), strings.HasPrefix(gt, "CHARACTER"):
return chooseType("string", "sql.NullString", "sql.NullString", m)
default:
return "interface{}"
}
}
}
func closeBrace(w io.Writer, n int) {
for i := 0; i < n; i++ {
fmt.Fprintln(w, `
}`)
}
}
var keywords = map[string]string{
"break": "brk",
"default": "def",
"func": "fn",
"interface": "intf",
"select": "selec",
"case": "cas",
"defer": "defe",
"go": "g",
"map": "ma",
"struct": "struc",
"chan": "cha",
"else": "els",
"goto": "got",
"package": "pkg",
"switch": "switc",
"const": "cons",
"fallthrough": "fallthroug",
"if": "i",
"range": "rang",
"type": "typ",
"continue": "cont",
"for": "fo",
"import": "impor",
"return": "rtn",
"var": "va",
}
type structField struct {
Name string
Type string
Tags reflect.StructTag
ReadOnly bool
}
func or(s1, s2 string) string {
if s1 == "" {
return s2
}
return s1
}
func columnForeignName(c *pqt.Column) string {
return c.Table.Name + "_" + c.Name
}
func sortedColumns(columns []*pqt.Column) []string {
tmp := make([]string, 0, len(columns))
for _, c := range columns {
tmp = append(tmp, c.Name)
}
sort.Strings(tmp)
return tmp
}
func snake(s string, private bool, acronyms map[string]string) string {
var parts []string
parts1 := strings.Split(s, "_")
for _, p1 := range parts1 {
parts2 := strings.Split(p1, "/")
for _, p2 := range parts2 {
parts3 := strings.Split(p2, "-")
parts = append(parts, parts3...)
}
}
for i, part := range parts {
if !private || i > 0 {
if formatted, ok := acronyms[part]; ok {
parts[i] = formatted
continue
}
}
parts[i] = xstrings.FirstRuneToUpper(part)
}
if private {
parts[0] = xstrings.FirstRuneToLower(parts[0])
}
return strings.Join(parts, "")
}
func chooseType(tm, to, tc string, mode int32) string {
switch mode {
case ModeCriteria:
return tc
case ModeMandatory:
return tm
case ModeOptional:
return to
case ModeDefault:
return to
default:
panic("unknown mode")
}
}
func tableConstraints(t *pqt.Table) []*pqt.Constraint {
var constraints []*pqt.Constraint
for _, c := range t.Columns {
constraints = append(constraints, c.Constraints()...)
}
return append(constraints, t.Constraints...)
}
func generateCustomType(t CustomType, m int32) string {
goType := func(tp reflect.Type) string {
if tp == nil {
return "<nil>"
}
return tp.String()
}
return chooseType(
goType(t.mandatoryTypeOf),
goType(t.optionalTypeOf),
goType(t.criteriaTypeOf),
m,
)
}
func columnMode(c *pqt.Column, m int32) int32 {
switch m {
case ModeCriteria:
case ModeMandatory:
case ModeOptional:
default:
if c.NotNull || c.PrimaryKey {
m = ModeMandatory
}
}
return m
}