feat(core): add core config for parsing plugin options(main)

Author: rayakame

internal/core/config.go

@@ -0,0 +1,39 @@
+package core
+
+import (
+	"encoding/json"
+	"fmt"
+	"github.com/sqlc-dev/plugin-sdk-go/plugin"
+)
+
+type Config struct {
+	SqlDriver string `json:"sql_driver" yaml:"sql_driver"`
+	ModelType string `json:"model_type" yaml:"model_type"`
+
+	Async bool
+}
+
+func ParseConfig(req *plugin.GenerateRequest) (*Config, error) {
+	var config Config
+	if len(req.PluginOptions) == 0 {
+		return &config, nil
+	}
+	if err := json.Unmarshal(req.PluginOptions, &config); err != nil {
+		return nil, fmt.Errorf("unmarshalling plugin options: %w", err)
+	}
+	if config.SqlDriver == "" {
+		config.SqlDriver = SQLDriverAioSQLite
+	}
+	val, err := isDriverAsync(config.SqlDriver)
+	if err != nil {
+		return nil, fmt.Errorf("invalid options: %s", err)
+	}
+	config.Async = val
+	if config.ModelType == "" {
+		config.ModelType = ModelTypeDataclass
+	}
+	if err := isModelTypeValid(config.ModelType); err != nil {
+		return nil, fmt.Errorf("invalid options: %s", err)
+	}
+	return &config, nil
+}