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package main
import (
"fmt"
"log"
"os"
"os/exec"
"path"
"strings"
"github.com/iancoleman/strcase"
"github.com/urfave/cli/v2"
pluralize "github.com/web-ridge/go-pluralize"
gqlgen_sqlboiler "github.com/web-ridge/gqlgen-sqlboiler/v2"
)
var pluralizer *pluralize.Client //nolint:gochecknoglobals
func init() { //nolint:gochecknoinits
pluralizer = pluralize.NewClient()
}
const (
indent = "\t"
lineBreak = "\n"
)
// global configs
func main() {
var modelDirectory string
var outputFile string
var mutations bool
var batchUpdate bool
var batchCreate bool
var batchDelete bool
var skipInputFields cli.StringSlice
var directives cli.StringSlice
var pagination string
app := &cli.App{
Flags: []cli.Flag{
&cli.StringFlag{
Name: "input",
Value: "models",
Usage: "directory where the sqlboiler models are",
Destination: &modelDirectory,
},
&cli.StringFlag{
Name: "output",
Value: "schema.graphql",
Usage: "filepath for schema",
Destination: &outputFile,
},
&cli.StringSliceFlag{
Name: "skip-input-fields",
Usage: "input names which should be skipped: e.g. --skip-input-fields=userId --skip-input-fields=" +
"organizationId --skip-input-fields=createdAt",
Destination: &skipInputFields,
},
&cli.StringSliceFlag{
Name: "directives",
Usage: "directives which should be added after resolvers e.g. isAuthenticated",
Destination: &directives,
},
&cli.BoolFlag{
Name: "mutations",
Usage: "generate mutations for models",
Value: true,
Destination: &mutations,
},
&cli.BoolFlag{
Name: "batch-update",
Usage: "generate batch update for models",
Value: true,
Destination: &batchUpdate,
},
&cli.BoolFlag{
Name: "batch-create",
Usage: "generate batch create for models",
Value: true,
Destination: &batchCreate,
},
&cli.BoolFlag{
Name: "batch-delete",
Usage: "generate batch delete for models",
Value: true,
Destination: &batchDelete,
},
&cli.StringFlag{
Name: "pagination",
Usage: "generate pagination support for models",
Value: "",
Destination: &pagination,
},
},
Action: func(c *cli.Context) error {
// Generate schema based on config
schema := getSchema(
modelDirectory,
mutations,
batchUpdate,
batchCreate,
batchDelete,
skipInputFields.Value(),
directives.Value(),
pagination,
)
// TODO: Write schema to the configured location
if fileExists(outputFile) { //nolint:nestif
baseFile := filenameWithoutExtension(outputFile) +
"-empty" +
getFilenameExtension(outputFile)
newOutputFile := filenameWithoutExtension(outputFile) +
"-new" +
getFilenameExtension(outputFile)
// remove previous files if exist
_ = os.Remove(baseFile)
_ = os.Remove(newOutputFile)
if err := writeContentToFile(newOutputFile, schema); err != nil {
return fmt.Errorf("could not write schema to disk: %v", err)
}
if err := formatFile(outputFile); err != nil {
return fmt.Errorf("could not format with prettier %v: %v", outputFile, err)
}
if err := formatFile(newOutputFile); err != nil {
return fmt.Errorf("could not format with prettier %v: %v", newOutputFile, err)
}
// Three way merging done based on this answer
// https://stackoverflow.com/a/9123563/2508481
// Empty file as base per the stackoverflow answer
name := "touch"
args := []string{baseFile}
out, err := exec.Command(name, args...).Output()
if err != nil {
fmt.Println("Executing command failed: ", name, strings.Join(args, " "))
return fmt.Errorf("merging failed %v: %v", err, out)
}
// Let's do the merge
name = "git"
args = []string{"merge-file", outputFile, baseFile, newOutputFile}
out, err = exec.Command(name, args...).Output()
if err != nil {
fmt.Println("Executing command failed: ", name, strings.Join(args, " "))
// remove base file
_ = os.Remove(baseFile)
return fmt.Errorf("merging failed or had conflicts %v: %v", err, out)
}
fmt.Println("Merging done without conflicts: ", out)
// remove files
_ = os.Remove(baseFile)
_ = os.Remove(newOutputFile)
// fmt.Printf("The date is %s\n", out)
} else {
fmt.Printf("Write schema of %v bytes to %v \n", len(schema), outputFile)
if err := writeContentToFile(outputFile, schema); err != nil {
fmt.Println("Could not write schema to disk: ", err)
}
return formatFile(outputFile)
}
return nil
},
}
err := app.Run(os.Args)
if err != nil {
log.Fatal(err)
}
}
func getFilenameExtension(fn string) string {
return path.Ext(fn)
}
func filenameWithoutExtension(fn string) string {
return strings.TrimSuffix(fn, path.Ext(fn))
}
func formatFile(filename string) error {
name := "prettier"
args := []string{filename, "--write"}
out, err := exec.Command(name, args...).Output()
if err != nil {
return fmt.Errorf("executing command: '%v %v' failed with: %v, output: %v", name, strings.Join(args, " "), err, out)
}
// fmt.Println(fmt.Sprintf("Formatting of %v done", filename))
return nil
}
func writeContentToFile(filename string, content string) error {
file, err := os.Create(filename)
if err != nil {
return fmt.Errorf("could not write %v to disk: %v", filename, err)
}
// Close file if this functions returns early or at the end
defer func() {
closeErr := file.Close()
if closeErr != nil {
fmt.Println("Error while closing file: ", closeErr)
}
}()
if _, err := file.WriteString(content); err != nil {
return fmt.Errorf("could not write content to file %v: %v", filename, err)
}
return nil
}
// fileExists checks if a file exists and is not a directory before we
// try using it to prevent further errors.
func fileExists(filename string) bool {
info, err := os.Stat(filename)
if os.IsNotExist(err) {
return false
}
return !info.IsDir()
}
const queryHelperStructs = `
input IDFilter {
equalTo: ID
notEqualTo: ID
in: [ID!]
notIn: [ID!]
}
input StringFilter {
equalTo: String
notEqualTo: String
in: [String!]
notIn: [String!]
startWith: String
notStartWith: String
endWith: String
notEndWith: String
contain: String
notContain: String
startWithStrict: String # Camel sensitive
notStartWithStrict: String # Camel sensitive
endWithStrict: String # Camel sensitive
notEndWithStrict: String # Camel sensitive
containStrict: String # Camel sensitive
notContainStrict: String # Camel sensitive
}
input IntFilter {
equalTo: Int
notEqualTo: Int
lessThan: Int
lessThanOrEqualTo: Int
moreThan: Int
moreThanOrEqualTo: Int
in: [Int!]
notIn: [Int!]
}
input FloatFilter {
equalTo: Float
notEqualTo: Float
lessThan: Float
lessThanOrEqualTo: Float
moreThan: Float
moreThanOrEqualTo: Float
in: [Float!]
notIn: [Float!]
}
input BooleanFilter {
equalTo: Boolean
notEqualTo: Boolean
}
`
type Model struct {
Name string
Fields []*Field
// Implements *string
}
type Field struct {
Name string
RelationName string // posts
RelationType string // Page, User, Post
Type string // String, ID, Integer
FullType string // e.g String! or if array [String!]
RelationFullType string // [Posts!]
FullTypeOptional string // e.g. String or if array [String]
BoilerField *gqlgen_sqlboiler.BoilerField
}
//nolint:gocognit,gocyclo // TODO: refactor this
func getSchema(
modelDirectory string,
mutations bool,
batchUpdate bool,
batchCreate bool,
batchDelete bool,
skipInputFields []string,
directivesSlice []string,
pagination string,
) string {
var s strings.Builder
// Parse models and their fields based on the sqlboiler model directory
boilerModels := gqlgen_sqlboiler.GetBoilerModels(modelDirectory)
models := boilerModelsToModels(boilerModels)
var fullDirectives []string // nolint:prealloc
for _, defaultDirective := range directivesSlice {
fullDirectives = append(fullDirectives, "@"+defaultDirective)
s.WriteString(fmt.Sprintf("directive @%v on FIELD_DEFINITION", defaultDirective))
s.WriteString(lineBreak)
}
s.WriteString(lineBreak)
joinedDirectives := strings.Join(fullDirectives, " ")
// Create basic structs e.g.
// type User {
// firstName: String!
// lastName: String
// isProgrammer: Boolean!
// organization: Organization!
// }
for _, model := range models {
s.WriteString("type " + model.Name + " {")
s.WriteString(lineBreak)
for _, field := range model.Fields {
// e.g we have foreign key from user to organization
// organizationID is clutter in your scheme
// you only want Organization and OrganizationID should be skipped
if field.BoilerField.IsRelation {
s.WriteString(indent + field.RelationName + ": " + field.RelationFullType)
s.WriteString(lineBreak)
} else {
s.WriteString(indent + field.Name + ": " + field.FullType)
s.WriteString(lineBreak)
}
}
s.WriteString("}")
s.WriteString(lineBreak)
s.WriteString(lineBreak)
}
// Add helpers for filtering lists
s.WriteString(queryHelperStructs)
s.WriteString(lineBreak)
// generate filter structs per model
for _, model := range models {
// Ignore some specified input fields
// Generate a type safe grapql filter
// Generate the base filter
// type UserFilter {
// search: String
// where: UserWhere
// }
s.WriteString("input " + model.Name + "Filter {")
s.WriteString(lineBreak)
s.WriteString(indent + "search: String")
s.WriteString(lineBreak)
s.WriteString(indent + "where: " + model.Name + "Where")
s.WriteString(lineBreak)
s.WriteString("}")
s.WriteString(lineBreak)
s.WriteString(lineBreak)
// Generate a pagination struct
if pagination == "offset" {
// type UserPagination {
// limit: Int!
// page: Int!
// }
s.WriteString("input " + model.Name + "Pagination {")
s.WriteString(lineBreak)
s.WriteString(indent + "limit: Int!")
s.WriteString(lineBreak)
s.WriteString(indent + "page: Int!")
s.WriteString(lineBreak)
s.WriteString("}")
s.WriteString(lineBreak)
s.WriteString(lineBreak)
}
// Generate a where struct
// type UserWhere {
// id: IDFilter
// title: StringFilter
// organization: OrganizationWhere
// or: FlowBlockWhere
// and: FlowBlockWhere
// }
s.WriteString("input " + model.Name + "Where {")
s.WriteString(lineBreak)
for _, field := range model.Fields {
if field.BoilerField.IsRelation {
// Support filtering in relationships (atleast schema wise)
s.WriteString(indent + field.RelationName + ": " + field.RelationType + "Where")
s.WriteString(lineBreak)
} else {
s.WriteString(indent + field.Name + ": " + field.Type + "Filter")
s.WriteString(lineBreak)
}
}
s.WriteString(indent + "or: " + model.Name + "Where")
s.WriteString(lineBreak)
s.WriteString(indent + "and: " + model.Name + "Where")
s.WriteString(lineBreak)
s.WriteString("}")
s.WriteString(lineBreak)
s.WriteString(lineBreak)
}
s.WriteString("type Query {")
s.WriteString(lineBreak)
for _, model := range models {
// single models
s.WriteString(indent)
s.WriteString(strcase.ToLowerCamel(model.Name) + "(id: ID!)")
s.WriteString(": ")
s.WriteString(model.Name + "!")
s.WriteString(joinedDirectives)
s.WriteString(lineBreak)
// lists
modelPluralName := pluralizer.Plural(model.Name)
s.WriteString(indent)
var paginationParameter string
if pagination == "offset" {
paginationParameter = ", pagination: " + model.Name + "Pagination"
}
s.WriteString(strcase.ToLowerCamel(modelPluralName) + "(filter: " + model.Name + "Filter" +
paginationParameter + ")")
s.WriteString(": ")
s.WriteString("[" + model.Name + "!]!")
s.WriteString(joinedDirectives)
s.WriteString(lineBreak)
}
s.WriteString("}")
s.WriteString(lineBreak)
s.WriteString(lineBreak)
// Generate input and payloads for mutatations
if mutations { //nolint:nestif
for _, model := range models {
filteredFields := fieldsWithout(model.Fields, skipInputFields)
modelPluralName := pluralizer.Plural(model.Name)
// input UserCreateInput {
// firstName: String!
// lastName: String
// organizationId: ID!
// }
s.WriteString("input " + model.Name + "CreateInput {")
s.WriteString(lineBreak)
for _, field := range filteredFields {
// id is not required in create and will be specified in update resolver
if field.Name == "id" {
continue
}
// not possible yet in input
// TODO: make this possible for one-to-one structs?
// only for foreign keys inside model itself
if field.BoilerField.IsRelation && field.BoilerField.IsArray ||
field.BoilerField.IsRelation && !strings.HasSuffix(field.BoilerField.Name, "ID") {
continue
}
s.WriteString(indent + field.Name + ": " + field.FullType)
s.WriteString(lineBreak)
}
s.WriteString("}")
s.WriteString(lineBreak)
s.WriteString(lineBreak)
// input UserUpdateInput {
// firstName: String!
// lastName: String
// organizationId: ID!
// }
s.WriteString("input " + model.Name + "UpdateInput {")
s.WriteString(lineBreak)
for _, field := range filteredFields {
// id is not required in create and will be specified in update resolver
if field.Name == "id" {
continue
}
// not possible yet in input
// TODO: make this possible for one-to-one structs?
// only for foreign keys inside model itself
if field.BoilerField.IsRelation && field.BoilerField.IsArray ||
field.BoilerField.IsRelation && !strings.HasSuffix(field.BoilerField.Name, "ID") {
continue
}
s.WriteString(indent + field.Name + ": " + field.FullTypeOptional)
s.WriteString(lineBreak)
}
s.WriteString("}")
s.WriteString(lineBreak)
s.WriteString(lineBreak)
if batchCreate {
s.WriteString("input " + modelPluralName + "CreateInput {")
s.WriteString(lineBreak)
s.WriteString(indent + strcase.ToLowerCamel(modelPluralName) + ": [" + model.Name + "CreateInput!]!")
s.WriteString("}")
s.WriteString(lineBreak)
s.WriteString(lineBreak)
}
// if batchUpdate {
// s.WriteString("input " + modelPluralName + "UpdateInput {")
// s.WriteString(lineBreak)
// s.WriteString(indent + strcase.ToLowerCamel(modelPluralName) + ": [" + model.Name + "UpdateInput!]!")
// s.WriteString("}")
// s.WriteString(lineBreak)
// s.WriteString(lineBreak)
// }
// type UserPayload {
// user: User!
// }
s.WriteString("type " + model.Name + "Payload {")
s.WriteString(lineBreak)
s.WriteString(indent + strcase.ToLowerCamel(model.Name) + ": " + model.Name + "!")
s.WriteString(lineBreak)
s.WriteString("}")
s.WriteString(lineBreak)
s.WriteString(lineBreak)
// TODO batch, delete input and payloads
// type UserDeletePayload {
// id: ID!
// }
s.WriteString("type " + model.Name + "DeletePayload {")
s.WriteString(lineBreak)
s.WriteString(indent + "id: ID!")
s.WriteString(lineBreak)
s.WriteString("}")
s.WriteString(lineBreak)
s.WriteString(lineBreak)
// type UsersPayload {
// ids: [ID!]!
// }
if batchCreate {
s.WriteString("type " + modelPluralName + "Payload {")
s.WriteString(lineBreak)
s.WriteString(indent + strcase.ToLowerCamel(modelPluralName) + ": [" + model.Name + "!]!")
s.WriteString(lineBreak)
s.WriteString("}")
s.WriteString(lineBreak)
s.WriteString(lineBreak)
}
// type UsersDeletePayload {
// ids: [ID!]!
// }
if batchDelete {
s.WriteString("type " + modelPluralName + "DeletePayload {")
s.WriteString(lineBreak)
s.WriteString(indent + "ids: [ID!]!")
s.WriteString(lineBreak)
s.WriteString("}")
s.WriteString(lineBreak)
s.WriteString(lineBreak)
}
// type UsersUpdatePayload {
// ok: Boolean!
// }
if batchUpdate {
s.WriteString("type " + modelPluralName + "UpdatePayload {")
s.WriteString(lineBreak)
s.WriteString(indent + "ok: Boolean!")
s.WriteString(lineBreak)
s.WriteString("}")
s.WriteString(lineBreak)
s.WriteString(lineBreak)
}
}
// Generate mutation queries
s.WriteString("type Mutation {")
s.WriteString(lineBreak)
for _, model := range models {
modelPluralName := pluralizer.Plural(model.Name)
// create single
// e.g createUser(input: UserInput!): UserPayload!
s.WriteString(indent)
s.WriteString("create" + model.Name + "(input: " + model.Name + "CreateInput!)")
s.WriteString(": ")
s.WriteString(model.Name + "Payload!")
s.WriteString(joinedDirectives)
s.WriteString(lineBreak)
// create multiple
// e.g createUsers(input: [UsersInput!]!): UsersPayload!
if batchCreate {
s.WriteString(indent)
s.WriteString("create" + modelPluralName + "(input: " + modelPluralName + "CreateInput!)")
s.WriteString(": ")
s.WriteString(modelPluralName + "Payload!")
s.WriteString(joinedDirectives)
s.WriteString(lineBreak)
}
// update single
// e.g updateUser(id: ID!, input: UserInput!): UserPayload!
s.WriteString(indent)
s.WriteString("update" + model.Name + "(id: ID!, input: " + model.Name + "UpdateInput!)")
s.WriteString(": ")
s.WriteString(model.Name + "Payload!")
s.WriteString(joinedDirectives)
s.WriteString(lineBreak)
// update multiple (batch update)
// e.g updateUsers(filter: UserFilter, input: UsersInput!): UsersPayload!
if batchUpdate {
s.WriteString(indent)
s.WriteString("update" + modelPluralName + "(filter: " + model.Name + "Filter, input: " +
model.Name + "UpdateInput!)")
s.WriteString(": ")
s.WriteString(modelPluralName + "UpdatePayload!")
s.WriteString(joinedDirectives)
s.WriteString(lineBreak)
}
// delete single
// e.g deleteUser(id: ID!): UserPayload!
s.WriteString(indent)
s.WriteString("delete" + model.Name + "(id: ID!)")
s.WriteString(": ")
s.WriteString(model.Name + "DeletePayload!")
s.WriteString(joinedDirectives)
s.WriteString(lineBreak)
// delete multiple
// e.g deleteUsers(filter: UserFilter, input: [UsersInput!]!): UsersPayload!
if batchDelete {
s.WriteString(indent)
s.WriteString("delete" + modelPluralName + "(filter: " + model.Name + "Filter)")
s.WriteString(": ")
s.WriteString(modelPluralName + "DeletePayload!")
s.WriteString(joinedDirectives)
s.WriteString(lineBreak)
}
}
s.WriteString("}")
s.WriteString(lineBreak)
s.WriteString(lineBreak)
}
return s.String()
}
func getFullType(fieldType string, isArray bool, isRequired bool) string {
gType := fieldType
if isArray {
// To use a list type, surround the type in square brackets, so [Int] is a list of integers.
gType = "[" + gType + "]"
}
if isRequired {
// Use an exclamation point to indicate a type cannot be nullable,
// so String! is a non-nullable string.
gType += "!"
}
return gType
}
func boilerModelsToModels(boilerModels []*gqlgen_sqlboiler.BoilerModel) []*Model {
models := make([]*Model, len(boilerModels))
for i, boilerModel := range boilerModels {
models[i] = &Model{
Name: boilerModel.Name,
Fields: boilerFieldsToFields(boilerModel.Fields),
}
}
return models
}
func boilerFieldsToFields(boilerFields []*gqlgen_sqlboiler.BoilerField) []*Field {
fields := make([]*Field, len(boilerFields))
for i, boilerField := range boilerFields {
fields[i] = boilerFieldToField(boilerField)
}
return fields
}
func boilerFieldToField(boilerField *gqlgen_sqlboiler.BoilerField) *Field {
var relationName string
var relationType string
var relationFullType string
if boilerField.Relationship != nil {
relationName = strcase.ToLowerCamel(boilerField.RelationshipName)
relationType = boilerField.Relationship.Name
relationFullType = getFullType(
relationType,
boilerField.IsArray,
boilerField.IsRequired,
)
}
t := toGraphQLType(boilerField.Name, boilerField.Type)
return &Field{
Name: toGraphQLName(boilerField.Name),
RelationName: relationName,
RelationType: relationType,
Type: t,
FullType: getFullType(t, boilerField.IsArray, boilerField.IsRequired),
FullTypeOptional: getFullType(t, boilerField.IsArray, false),
RelationFullType: relationFullType,
BoilerField: boilerField,
}
}
func toGraphQLName(fieldName string) string {
graphqlName := fieldName
// Golang ID to Id the right way
// Primary key
if graphqlName == "ID" {
graphqlName = "id"
}
if graphqlName == "URL" {
graphqlName = "url"
}
// e.g. OrganizationID, TODO: more robust solution?
graphqlName = strings.Replace(graphqlName, "ID", "Id", -1)
graphqlName = strings.Replace(graphqlName, "URL", "Url", -1)
return strcase.ToLowerCamel(graphqlName)
}
func toGraphQLType(fieldName, boilerType string) string {
lowerFieldName := strings.ToLower(fieldName)
lowerBoilerType := strings.ToLower(boilerType)
if strings.HasSuffix(lowerFieldName, "id") {
return "ID"
}
if strings.Contains(lowerBoilerType, "string") {
return "String"
}
if strings.Contains(lowerBoilerType, "int") {
return "Int"
}
if strings.Contains(lowerBoilerType, "decimal") || strings.Contains(lowerBoilerType, "float") {
return "Float"
}
if strings.Contains(lowerBoilerType, "bool") {
return "Boolean"
}
// TODO: make this a scalar or something configurable?
// I like to use unix here
if strings.Contains(lowerBoilerType, "time") {
return "Int"
}
// E.g. UserSlice
boilerType = strings.TrimSuffix(boilerType, "Slice")
return boilerType
}
func fieldsWithout(fields []*Field, skipFieldNames []string) []*Field {
var filteredFields []*Field
for _, field := range fields {
if !sliceContains(skipFieldNames, field.Name) {
filteredFields = append(filteredFields, field)
}
}
return filteredFields
}
func sliceContains(slice []string, v string) bool {
for _, s := range slice {
if s == v {
return true
}
}
return false
}