feat: [#280] Implement Create and DropIfExists methods of Schema

contracts/database/migration/blueprint.go

@@ -1,4 +1,30 @@
 package migration
 
+import (
+	"github.com/goravel/framework/contracts/database/orm"
+)
+
 type Blueprint interface {
+	// Build Execute the blueprint to build / modify the table.
+	Build(query orm.Query, grammar Grammar) error
+	// Create Indicate that the table needs to be created.
+	Create()
+	// DropIfExists Indicate that the table should be dropped if it exists.
+	DropIfExists()
+	// GetAddedColumns Get the added columns.
+	GetAddedColumns() []ColumnDefinition
+	// GetTableName Get the table name with prefix.
+	GetTableName() string
+	// HasCommand Determine if the blueprint has a specific command.
+	HasCommand(command string) bool
+	// ID Create a new auto-incrementing big integer (8-byte) column on the table.
+	ID(column ...string) ColumnDefinition
+	// Integer Create a new integer (4-byte) column on the table.
+	Integer(column string) ColumnDefinition
+	// SetTable Set the table that the blueprint operates on.
+	SetTable(name string)
+	// String Create a new string column on the table.
+	String(column string, length ...int) ColumnDefinition
+	// ToSql Get the raw SQL statements for the blueprint.
+	ToSql(query orm.Query, grammar Grammar) []string
 }

contracts/database/migration/column.go

@@ -0,0 +1,22 @@
+package migration
+
+type ColumnDefinition interface {
+	// AutoIncrement set the column as auto increment
+	AutoIncrement() ColumnDefinition
+	// GetAutoIncrement returns the autoIncrement value
+	GetAutoIncrement() bool
+	// GetChange returns the change value
+	GetChange() bool
+	// GetDefault returns the default value
+	GetDefault() any
+	// GetLength returns the length value
+	GetLength() int
+	// GetName returns the name value
+	GetName() string
+	// GetNullable returns the nullable value
+	GetNullable() bool
+	// GetType returns the type value
+	GetType() string
+	// Unsigned set the column as unsigned
+	Unsigned() ColumnDefinition
+}

contracts/database/migration/grammar.go

@@ -0,0 +1,22 @@
+package migration
+
+import (
+	"github.com/goravel/framework/contracts/database/orm"
+)
+
+type Grammar interface {
+	// CompileCreate Compile a create table command.
+	CompileCreate(blueprint Blueprint, query orm.Query) string
+	// CompileDropIfExists Compile a drop table (if exists) command.
+	CompileDropIfExists(blueprint Blueprint) string
+	// GetAttributeCommands Get the commands for the schema build.
+	GetAttributeCommands() []string
+	// GetModifiers Get the column modifiers.
+	GetModifiers() []func(Blueprint, ColumnDefinition) string
+	// TypeBigInteger Create the column definition for a big integer type.
+	TypeBigInteger(column ColumnDefinition) string
+	// TypeInteger Create the column definition for an integer type.
+	TypeInteger(column ColumnDefinition) string
+	// TypeString Create the column definition for a string type.
+	TypeString(column ColumnDefinition) string
+}

contracts/database/migration/migrator.go

@@ -0,0 +1,9 @@
+package migration
+
+type Migrator interface {
+	//Run()
+	//RunUp()
+	//RunDown()
+	//Rollback()
+	//Reset()
+}

contracts/database/migration/repository.go

@@ -0,0 +1,26 @@
+package migration
+
+type Repository interface {
+	//// CreateRepository Create the migration repository data store.
+	//CreateRepository()
+	//// Delete Remove a migration from the log.
+	//Delete(migration string)
+	//// DeleteRepository Delete the migration repository data store.
+	//DeleteRepository()
+	//// GetLast Get the last migration batch.
+	//GetLast()
+	//// GetMigrationBatches Get the completed migrations with their batch numbers.
+	//GetMigrationBatches()
+	//// GetMigrations Get the list of migrations.
+	//GetMigrations(steps int)
+	//// GetMigrationsByBatch Get the list of the migrations by batch.
+	//GetMigrationsByBatch(batch int)
+	//// GetNextBatchNumber Get the next migration batch number.
+	//GetNextBatchNumber()
+	//// GetRan Get the completed migrations.
+	//GetRan()
+	//// Log that a migration was run.
+	//Log(file, batch string)
+	//// RepositoryExists Determine if the migration repository exists.
+	//RepositoryExists()
+}

contracts/database/migration/schema.go

@@ -2,11 +2,11 @@ package migration
 
 type Schema interface {
 	// Create a new table on the schema.
-	//Create(table string, callback func(table Blueprint))
+	Create(table string, callback func(table Blueprint))
 	// Connection Get the connection for the schema.
 	Connection(name string) Schema
 	// DropIfExists Drop a table from the schema if exists.
-	//DropIfExists(table string)
+	DropIfExists(table string)
 	// Register migrations.
 	Register([]Migration)
 	// Sql Execute a sql directly.
@@ -25,3 +25,18 @@ type Migration interface {
 	// Down Reverse the migrations.
 	Down()
 }
+
+type Command struct {
+	Algorithm  string
+	Column     ColumnDefinition
+	Columns    []string
+	From       string
+	Index      string
+	On         string
+	OnDelete   string
+	OnUpdate   string
+	Name       string
+	To         string
+	References []string
+	Value      string
+}

database/migration/blueprint.go

@@ -0,0 +1,218 @@
+package migration
+
+import (
+	"fmt"
+
+	"github.com/goravel/framework/contracts/database/migration"
+	ormcontract "github.com/goravel/framework/contracts/database/orm"
+	"github.com/goravel/framework/support/convert"
+)
+
+const (
+	commandAdd          = "add"
+	commandChange       = "change"
+	commandComment      = "comment"
+	commandCreate       = "create"
+	commandDropIfExists = "dropIfExists"
+	defaultStringLength = 255
+)
+
+type Blueprint struct {
+	columns  []*ColumnDefinition
+	commands []*migration.Command
+	prefix   string
+	schema   string
+	table    string
+}
+
+func NewBlueprint(prefix, schema string) *Blueprint {
+	return &Blueprint{
+		prefix: prefix,
+		schema: schema,
+	}
+}
+
+func (r *Blueprint) BigIncrements(column string) migration.ColumnDefinition {
+	return r.UnsignedBigInteger(column).AutoIncrement()
+}
+
+func (r *Blueprint) BigInteger(column string) migration.ColumnDefinition {
+	columnImpl := &ColumnDefinition{
+		name:  &column,
+		ttype: convert.Pointer("bigInteger"),
+	}
+
+	r.addColumn(columnImpl)
+
+	return columnImpl
+}
+
+func (r *Blueprint) Build(query ormcontract.Query, grammar migration.Grammar) error {
+	for _, sql := range r.ToSql(query, grammar) {
+		// TODO remove
+		fmt.Println("sql:", sql)
+		if _, err := query.Exec(sql); err != nil {
+			return err
+		}
+	}
+
+	return nil
+}
+
+func (r *Blueprint) Create() {
+	r.addCommand(&migration.Command{
+		Name: commandCreate,
+	})
+}
+
+func (r *Blueprint) DropIfExists() {
+	r.addCommand(&migration.Command{
+		Name: commandDropIfExists,
+	})
+}
+
+func (r *Blueprint) GetAddedColumns() []migration.ColumnDefinition {
+	var columns []migration.ColumnDefinition
+	for _, column := range r.columns {
+		if column.change == nil || !*column.change {
+			columns = append(columns, column)
+		}
+	}
+
+	return columns
+}
+
+func (r *Blueprint) GetChangedColumns() []migration.ColumnDefinition {
+	var columns []migration.ColumnDefinition
+	for _, column := range r.columns {
+		if column.change != nil && *column.change {
+			columns = append(columns, column)
+		}
+	}
+
+	return columns
+}
+
+func (r *Blueprint) GetTableName() string {
+	// TODO Add schema for Postgres
+	return r.prefix + r.table
+}
+
+func (r *Blueprint) HasCommand(command string) bool {
+	for _, c := range r.commands {
+		if c.Name == command {
+			return true
+		}
+	}
+
+	return false
+}
+
+func (r *Blueprint) ID(column ...string) migration.ColumnDefinition {
+	if len(column) > 0 {
+		return r.BigIncrements(column[0])
+	}
+
+	return r.BigIncrements("id")
+}
+
+func (r *Blueprint) Integer(column string) migration.ColumnDefinition {
+	columnImpl := &ColumnDefinition{
+		name:  &column,
+		ttype: convert.Pointer("integer"),
+	}
+
+	r.addColumn(columnImpl)
+
+	return columnImpl
+}
+
+func (r *Blueprint) SetTable(name string) {
+	r.table = name
+}
+
+func (r *Blueprint) String(column string, length ...int) migration.ColumnDefinition {
+	defaultLength := defaultStringLength
+	if len(length) > 0 {
+		defaultLength = length[0]
+	}
+
+	columnImpl := &ColumnDefinition{
+		length: &defaultLength,
+		name:   &column,
+		ttype:  convert.Pointer("string"),
+	}
+	r.addColumn(columnImpl)
+
+	return columnImpl
+}
+
+func (r *Blueprint) ToSql(query ormcontract.Query, grammar migration.Grammar) []string {
+	r.addImpliedCommands(grammar)
+
+	var statements []string
+	for _, command := range r.commands {
+		switch command.Name {
+		case commandCreate:
+			statements = append(statements, grammar.CompileCreate(r, query))
+		case commandDropIfExists:
+			statements = append(statements, grammar.CompileDropIfExists(r))
+		}
+	}
+
+	return statements
+}
+
+func (r *Blueprint) UnsignedBigInteger(column string) migration.ColumnDefinition {
+	return r.BigInteger(column).Unsigned()
+}
+
+func (r *Blueprint) addAttributeCommands(grammar migration.Grammar) {
+	attributeCommands := grammar.GetAttributeCommands()
+	for _, column := range r.columns {
+		for _, command := range attributeCommands {
+			if command == "comment" && column.comment != nil {
+				r.addCommand(&migration.Command{
+					Column: column,
+					Name:   commandComment,
+				})
+			}
+		}
+	}
+}
+
+func (r *Blueprint) addColumn(column *ColumnDefinition) {
+	r.columns = append(r.columns, column)
+}
+
+func (r *Blueprint) addCommand(command *migration.Command) {
+	r.commands = append(r.commands, command)
+}
+
+func (r *Blueprint) addImpliedCommands(grammar migration.Grammar) {
+	var commands []*migration.Command
+	if len(r.GetAddedColumns()) > 0 && !r.isCreate() {
+		commands = append(commands, &migration.Command{
+			Name: commandAdd,
+		})
+	}
+	if len(r.GetChangedColumns()) > 0 && !r.isCreate() {
+		commands = append(commands, &migration.Command{
+			Name: commandChange,
+		})
+	}
+	if len(commands) > 0 {
+		r.commands = append(commands, r.commands...)
+	}
+	r.addAttributeCommands(grammar)
+}
+
+func (r *Blueprint) isCreate() bool {
+	for _, command := range r.commands {
+		if command.Name == commandCreate {
+			return true
+		}
+	}
+
+	return false
+}