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objects.go
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/
objects.go
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package utils
import (
"fmt"
"github.com/jitsucom/bulker/jitsubase/jsoniter"
"github.com/mitchellh/mapstructure"
"gopkg.in/yaml.v3"
)
// ParseObject parses struct of any type from input object that can be:
//
// map, json string or yaml string,
//
// already struct of provided type or pointer to it
func ParseObject[K any](inputObject any, result *K) error {
if result == nil {
return fmt.Errorf("result variable must be an empty struct of desired type, got nil")
}
switch cfg := inputObject.(type) {
case *K:
*result = *cfg
case K:
*result = cfg
case map[string]any:
if err := mapstructure.Decode(cfg, result); err != nil {
return fmt.Errorf("failed to parse map as %T : %v", result, err)
}
case []byte:
if len(cfg) == 0 {
return fmt.Errorf("failed to parse. input data is empty")
}
if cfg[0] == '{' {
if err := jsoniter.Unmarshal(cfg, result); err != nil {
return fmt.Errorf("failed to parse json as %T : %v", result, err)
}
} else {
if err := yaml.Unmarshal(cfg, result); err != nil {
return fmt.Errorf("failed to parse yaml as %T : %v", result, err)
}
}
case string:
if len(cfg) == 0 {
return fmt.Errorf("failed to parse. input string is empty")
}
if cfg[0] == '{' {
if err := jsoniter.Unmarshal([]byte(cfg), result); err != nil {
return fmt.Errorf("failed to parse json as %T : %v", result, err)
}
} else {
if err := yaml.Unmarshal([]byte(cfg), result); err != nil {
return fmt.Errorf("failed to parse yaml as %T : %v", result, err)
}
}
default:
return fmt.Errorf("can't parse object from type: %T", cfg)
}
return nil
}
func ExtractObject(object any, path ...string) (any, error) {
mp, ok := object.(map[string]any)
if !ok {
return nil, fmt.Errorf("Expected object of type map[string]any got: %T", object)
}
last := len(path) == 1
val, ok := mp[path[0]]
if !last && (!ok || val == nil) {
return nil, fmt.Errorf("Failed to reach end of the path. Left path: %s", path)
}
if last {
return val, nil
}
return ExtractObject(val, path[1:]...)
}
// Nvl returns first not null object or pointer from varargs
//
// return nil if all passed arguments are nil
func Nvl[T comparable](args ...T) T {
var empty T
for _, str := range args {
if str != empty {
return str
}
}
return empty
}
// NvlMap returns first not empty map from varargs
//
// return nil if all passed maps are empty
func NvlMap(args ...map[string]any) map[string]any {
for _, str := range args {
if len(str) > 0 {
return str
}
}
return nil
}