github.com/orange-cloudfoundry/cli@v7.1.0+incompatible/command/flag/credentials_or_json.go (about)

     1  package flag
     2  
     3  import (
     4  	"encoding/json"
     5  	"fmt"
     6  	"io/ioutil"
     7  	"strings"
     8  
     9  	flags "github.com/jessevdk/go-flags"
    10  )
    11  
    12  type CredentialsOrJSON struct {
    13  	IsSet                 bool
    14  	UserPromptCredentials []string
    15  	Value                 map[string]interface{}
    16  }
    17  
    18  func (c *CredentialsOrJSON) UnmarshalFlag(input string) error {
    19  	c.IsSet = true
    20  
    21  	input = strings.Trim(input, `"'`)
    22  
    23  	if value, ok := canParseAsJSON(input); ok {
    24  		c.Value = value
    25  		return nil
    26  	}
    27  
    28  	value, ok, err := canParseFileAsJSON(input)
    29  	if err != nil {
    30  		return err
    31  	}
    32  	if ok {
    33  		c.Value = value
    34  		return nil
    35  	}
    36  
    37  	keys, ok := canParseAsCredentialsKeys(input)
    38  	if ok {
    39  		c.UserPromptCredentials = keys
    40  	}
    41  
    42  	return nil
    43  }
    44  
    45  func (c *CredentialsOrJSON) Complete(prefix string) []flags.Completion {
    46  	return completeWithTilde(prefix)
    47  }
    48  
    49  func canParseAsJSON(input string) (value map[string]interface{}, ok bool) {
    50  	if err := json.Unmarshal([]byte(input), &value); err == nil {
    51  		ok = true
    52  	}
    53  	return
    54  }
    55  
    56  func canParseFileAsJSON(input string) (value map[string]interface{}, ok bool, parseError error) {
    57  	contents, err := ioutil.ReadFile(input)
    58  	if err != nil {
    59  		return
    60  	}
    61  
    62  	if err := json.Unmarshal(contents, &value); err != nil {
    63  		parseError = &flags.Error{
    64  			Type:    flags.ErrRequired,
    65  			Message: fmt.Sprintf("The file '%s' contains invalid JSON. Please provide a path to a file containing a valid JSON object.", input),
    66  		}
    67  		return
    68  	}
    69  
    70  	ok = true
    71  	return
    72  }
    73  
    74  func canParseAsCredentialsKeys(input string) (credentials []string, ok bool) {
    75  	if len(input) > 0 {
    76  		ok = true
    77  		for _, key := range strings.Split(input, ",") {
    78  			key = strings.Trim(key, " ")
    79  			credentials = append(credentials, key)
    80  		}
    81  	}
    82  	return
    83  }