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main.go
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main.go
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package main // import "git.ultraware.nl/NiseVoid/qb/qb-generator"
import (
"encoding/json"
"flag"
"html/template"
"io"
"log"
"os"
"os/exec"
"strings"
)
type inputTable struct {
String string `json:"name"`
Alias string `json:"alias"`
Fields []inputField `json:"fields"`
}
type inputField struct {
String string `json:"name"`
Nullable bool `json:"null"`
ReadOnly bool `json:"read_only"`
DataType string `json:"data_type"`
Size int `json:"size"`
}
type table struct {
Table string
TableString string
Alias string
Fields []field
}
type field struct {
Name string
String string
ReadOnly bool
DataType dataType
}
var fullUpperList = []string{
`acl`,
`api`,
`ascii`,
`cpu`,
`css`,
`dns`,
`eof`,
`guid`,
`html`,
`http`,
`https`,
`id`,
`ip`,
`json`,
`lhs`,
`qps`,
`ram`,
`rhs`,
`rpc`,
`sla`,
`smtp`,
`sql`,
`ssh`,
`tcp`,
`tls`,
`ttl`,
`udp`,
`ui`,
`uid`,
`uuid`,
`uri`,
`url`,
`utf8`,
`vm`,
`xml`,
`xmpp`,
`xsrf`,
`xss`,
}
type dataType struct {
Name string
Size int
Null bool
}
var dataTypes = map[string]dataType{
`char`: {`String`, 0, false},
`character`: {`String`, 0, false},
`character varying`: {`String`, 0, false},
`varchar`: {`String`, 0, false},
`tinyint`: {`Int`, 8, false},
`smallint`: {`Int`, 16, false},
`int`: {`Int`, 32, false},
`integer`: {`Int`, 32, false},
`bigint`: {`Int`, 64, false},
`real`: {`Float`, 32, false},
`float`: {`Float`, 64, false},
`double`: {`Float`, 64, false},
`time`: {`Time`, 0, false},
`date`: {`Date`, 0, false},
`datetime`: {`Time`, 0, false},
`timestamp`: {`Time`, 0, false},
`boolean`: {`Bool`, 0, false},
`bool`: {`Bool`, 0, false},
}
func getDataType(t string, size int, null bool) dataType {
if v, ok := dataTypes[strings.Split(t, ` `)[0]]; ok {
if v.Size == 0 {
v.Size = size
}
v.Null = null
return v
}
return dataType{``, size, null}
}
func newField(f inputField) field {
return field{cleanName(f.String), f.String, f.ReadOnly, getDataType(f.DataType, f.Size, f.Nullable)}
}
var nameReplacer = strings.NewReplacer(
` `, `_`,
`-`, `_`,
)
func cleanName(s string) string {
s = nameReplacer.Replace(s)
parts := strings.Split(s, `.`)
parts = strings.Split(parts[len(parts)-1], `_`)
for k := range parts {
upper := false
for _, v := range fullUpperList {
if v == parts[k] {
upper = true
break
}
}
if upper || len(parts[k]) <= 1 {
parts[k] = strings.ToUpper(parts[k])
continue
}
parts[k] = strings.ToUpper(string(parts[k][0])) + parts[k][1:]
}
return strings.Join(parts, ``)
}
var pkg string
func init() {
log.SetFlags(0)
flag.StringVar(&pkg, `package`, `model`, `The package name for the output file`)
flag.Parse()
if len(flag.Args()) != 2 {
log.Println(`Usage: qbgenerate [options] input.json output.go`)
os.Exit(2)
}
}
func main() {
in, err := os.Open(flag.Arg(0))
if err != nil {
log.Fatal(`Failed to open input file. `, err)
}
input := []inputTable{}
err = json.NewDecoder(in).Decode(&input)
if err != nil {
log.Fatal(`Failed to parse input file. `, err)
}
out, err := os.OpenFile(flag.Arg(1), os.O_CREATE|os.O_TRUNC|os.O_WRONLY, 0600)
if err != nil {
log.Fatal(`Failed to open output file. `, err)
}
err = generateCode(out, input)
if err != nil {
log.Fatal(`Failed to generate code. `, err)
}
_ = out.Close()
err = exec.Command(`goimports`, `-w`, out.Name()).Run()
if err != nil {
log.Fatal(`Failed to exectue goimports. `, err)
}
}
func generateCode(out io.Writer, input []inputTable) error {
tables := make([]table, len(input))
for k, v := range input {
t := &tables[k]
t.Table = cleanName(v.String)
t.Alias = v.Alias
t.TableString = v.String
for _, f := range v.Fields {
t.Fields = append(t.Fields, newField(f))
}
}
t, err := template.New(`code`).Parse(codeTemplate)
if err != nil {
return err
}
_, _ = io.WriteString(out, "// Code generated by qb-generator; DO NOT EDIT.\n\n")
_, _ = io.WriteString(out, `package `+pkg+"\n\n")
for _, v := range tables {
if err := t.Execute(out, v); err != nil {
return err
}
}
return nil
}