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folder.go
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folder.go
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package folder
import (
"context"
"fmt"
"os"
"path/filepath"
"github.com/alexfalkowski/go-service/meta"
"github.com/alexfalkowski/go-service/telemetry/tracer"
"github.com/alexfalkowski/konfig/source/configurator/errors"
"go.opentelemetry.io/otel/trace"
)
// NewConfigurator for folder.
func NewConfigurator(cfg *Config, t trace.Tracer) *Configurator {
return &Configurator{cfg: cfg, tracer: t}
}
// Configurator for folder.
type Configurator struct {
cfg *Config
tracer trace.Tracer
}
// GetConfig for folder.
func (c *Configurator) GetConfig(ctx context.Context, app, ver, env, continent, country, cmd, kind string) ([]byte, error) {
ctx, span := c.span(ctx)
defer span.End()
if _, err := os.Stat(c.cfg.Dir); os.IsNotExist(err) {
tracer.Error(err, span)
return nil, err
}
p := c.path(app, ver, env, continent, country, cmd, kind)
path := filepath.Join(c.cfg.Dir, p)
data, err := os.ReadFile(filepath.Clean(path))
if err != nil {
tracer.Error(err, span)
if os.IsNotExist(err) {
meta.WithAttribute(ctx, "folderFileError", meta.Error(err))
return nil, errors.ErrNotFound
}
return nil, err
}
return data, nil
}
func (c *Configurator) path(app, ver, env, continent, country, cmd, kind string) string {
if continent == "*" && country == "*" {
return fmt.Sprintf("%s/%s/%s/%s.%s", app, ver, env, cmd, kind)
}
if continent != "*" && country == "*" {
return fmt.Sprintf("%s/%s/%s/%s/%s.%s", app, ver, env, continent, cmd, kind)
}
return fmt.Sprintf("%s/%s/%s/%s/%s/%s.%s", app, ver, env, continent, country, cmd, kind)
}
func (c *Configurator) span(ctx context.Context) (context.Context, trace.Span) {
ctx, span := c.tracer.Start(ctx, operationName("get config"), trace.WithSpanKind(trace.SpanKindClient))
ctx = tracer.WithTraceID(ctx, span)
return ctx, span
}
func operationName(name string) string {
return tracer.OperationName("s3", name)
}