/
definitions.go
298 lines (248 loc) · 6.77 KB
/
definitions.go
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// Package geneddl provides DDL generation for json schema
package geneddl
import (
"bytes"
"encoding/json"
"errors"
"fmt"
"github.com/cihangir/gene/generators/common"
"github.com/cihangir/gene/utils"
"github.com/cihangir/schema"
"github.com/cihangir/stringext"
)
// GeneratorName holds generator name
const GeneratorName = "ddl"
// Generator provides DDL generation
type Generator struct {
DatabaseName string
SchemaName string
TableName string
RoleName string
FieldNameCase string `default:"snake"`
}
// New is the constructor for generator struct
// Generate generates the basic CRUD statements for the models
func (g *Generator) Generate(req *common.Req, res *common.Res) error {
context := req.Context
if context == nil || context.Config == nil || !common.IsIn(GeneratorName, context.Config.Generators...) {
return nil
}
if req.Schema == nil {
if req.SchemaStr == "" {
return errors.New("both schema and string schema is not set")
}
s := &schema.Schema{}
if err := json.Unmarshal([]byte(req.SchemaStr), s); err != nil {
return err
}
req.Schema = s.Resolve(nil)
}
if req.Schema.Title == "" {
return errors.New("Title should be set")
}
outputs := make([]common.Output, 0)
moduleName := stringext.ToFieldName(req.Schema.Title)
settings := GenerateSettings(GeneratorName, moduleName, req.Schema)
settings.SetNX("rootPathPrefix", "db")
rootPathPrefix := settings.Get("rootPathPrefix").(string)
fullPathPrefix := req.Context.Config.Target + rootPathPrefix + "/"
settings.Set("fullPathPrefix", fullPathPrefix)
for _, name := range schema.SortedKeys(req.Schema.Definitions) {
def := req.Schema.Definitions[name]
// schema should have our generator
if !def.Generators.Has(GeneratorName) {
continue
}
settingsDef := SetDefaultSettings(GeneratorName, settings, def)
settingsDef.Set("tableName", stringext.ToFieldName(def.Title))
//
// generate roles
//
role, err := DefineRole(settingsDef, def)
if err != nil {
return err
}
outputs = append(outputs, common.Output{
Content: role,
Path: fmt.Sprintf(
"%s/001-%s_roles.sql",
fullPathPrefix,
settingsDef.Get("databaseName").(string),
),
DoNotFormat: true,
})
//
// generate database
//
db, err := DefineDatabase(settingsDef, def)
if err != nil {
return err
}
outputs = append(outputs, common.Output{
Content: db,
Path: fmt.Sprintf(
"%s/002-%s_database.sql",
fullPathPrefix,
settingsDef.Get("databaseName").(string),
),
DoNotFormat: true,
})
//
// generate extenstions
//
extenstions, err := DefineExtensions(settingsDef, def)
if err != nil {
return err
}
outputs = append(outputs, common.Output{
Content: extenstions,
Path: fmt.Sprintf(
"%s/003-%s_extensions.sql",
fullPathPrefix,
settingsDef.Get("databaseName").(string)),
DoNotFormat: true,
})
//
// generate schema
//
sc, err := DefineSchema(settingsDef, def)
if err != nil {
return err
}
outputs = append(outputs, common.Output{
Content: sc,
Path: fmt.Sprintf(
"%s/%s/004-schema.sql",
fullPathPrefix,
settingsDef.Get("schemaName").(string),
),
DoNotFormat: true,
})
//
// generate sequences
//
sequence, err := DefineSequence(settingsDef, def)
if err != nil {
return err
}
outputs = append(outputs, common.Output{
Content: sequence,
Path: fmt.Sprintf(
"%s/%s/005-%s-sequence.sql",
fullPathPrefix,
settingsDef.Get("schemaName").(string),
settingsDef.Get("tableName").(string),
),
DoNotFormat: true,
})
//
// generate types
//
types, err := DefineTypes(settingsDef, def)
if err != nil {
return err
}
outputs = append(outputs, common.Output{
Content: types,
Path: fmt.Sprintf(
"%s/%s/006-%s-types.sql",
fullPathPrefix,
settingsDef.Get("schemaName").(string),
settingsDef.Get("tableName").(string),
),
DoNotFormat: true,
})
//
// generate tables
//
table, err := DefineTable(settingsDef, def)
if err != nil {
return err
}
outputs = append(outputs, common.Output{
Content: table,
Path: fmt.Sprintf(
"%s/%s/007-%s-table.sql",
fullPathPrefix,
settingsDef.Get("schemaName").(string),
settingsDef.Get("tableName").(string),
),
DoNotFormat: true,
})
//
// generate constraints
//
constraints, err := DefineConstraints(settingsDef, def)
if err != nil {
return err
}
outputs = append(outputs, common.Output{
Content: constraints,
Path: fmt.Sprintf(
"%s/%s/008-%s-constraints.sql",
fullPathPrefix,
settingsDef.Get("schemaName").(string),
settingsDef.Get("tableName").(string),
),
DoNotFormat: true,
})
}
res.Output = outputs
return nil
}
// GenerateSettings generates settings for the ddl package
func GenerateSettings(genName string, moduleName string, s *schema.Schema) schema.Generator {
settings, ok := s.Generators.Get(genName)
if !ok {
settings = schema.Generator{}
}
settings.SetNX("databaseName", stringext.ToFieldName(moduleName))
settings.SetNX("schemaName", stringext.ToFieldName(moduleName))
settings.SetNX("tableName", stringext.ToFieldName(s.Title))
settings.SetNX("roleName", stringext.ToFieldName(moduleName))
// convert []interface to []string
grants := settings.GetWithDefault("grants", []string{"ALL"})
grantsI, ok := grants.([]interface{})
grantsS := make([]string, 0)
if ok {
for _, t := range grantsI {
grantsS = append(grantsS, t.(string))
}
} else {
grantsS = grants.([]string)
}
settings.Set("grants", grantsS)
return settings
}
// SetDefaultSettings sets the default values for the settings
func SetDefaultSettings(genName string, defaultSettings schema.Generator, s *schema.Schema) schema.Generator {
settings, _ := s.Generators.Get(genName)
settings.SetNX("databaseName", defaultSettings.Get("databaseName").(string))
settings.SetNX("schemaName", defaultSettings.Get("schemaName").(string))
settings.SetNX("tableName", defaultSettings.Get("tableName").(string))
settings.SetNX("roleName", defaultSettings.Get("roleName").(string))
// convert []interface to []string
grants := settings.GetWithDefault("grants", defaultSettings.Get("grants").([]string))
grantsI, ok := grants.([]interface{})
grantsS := make([]string, 0)
if ok {
for _, t := range grantsI {
grantsS = append(grantsS, t.(string))
}
} else {
grantsS = grants.([]string)
}
settings.Set("grants", grantsS)
return settings
}
func clean(b []byte) []byte {
b = utils.NewLinesRegex.ReplaceAll(b, []byte(""))
// convert tabs to 4 spaces
b = bytes.Replace(b, []byte("\t"), []byte(" "), -1)
// clean extra spaces
b = bytes.Replace(b, []byte(" ,"), []byte(","), -1)
b = bytes.Replace(b, []byte(" ,"), []byte(","), -1)
// replace last trailing comma
b = bytes.Replace(b, []byte(",\n)"), []byte("\n)"), -1)
return b
}