snoobert/errors.go

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package geddit
import (
"encoding/json"
"fmt"
"net/http"
)
// RedditError is an error coming from Reddit
type RedditError struct {
Label string
Reason string
Field string
}
func (e *RedditError) Error() string {
return fmt.Sprintf("%s: %s because of field %q", e.Label, e.Reason, e.Field)
}
// UnmarshalJSON implements the json.Unmarshaler interface.
func (e *RedditError) UnmarshalJSON(data []byte) error {
var info []string
err := json.Unmarshal(data, &info)
if err != nil {
return err
}
if len(info) != 3 {
return fmt.Errorf("got unexpected Reddit error: %v", info)
}
e.Label = info[0]
e.Reason = info[1]
e.Field = info[2]
return nil
}
// JSONErrorResponse is an error response that sometimes gets returned with a 200 code
type JSONErrorResponse struct {
// HTTP response that caused this error
Response *http.Response `json:"-"`
JSON *struct {
Errors []RedditError `json:"errors,omitempty"`
} `json:"json,omitempty"`
}
func (r *JSONErrorResponse) Error() string {
var message string
if r.JSON != nil && len(r.JSON.Errors) > 0 {
for i, err := range r.JSON.Errors {
message += err.Error()
if i < len(r.JSON.Errors)-1 {
message += ";"
}
}
}
return fmt.Sprintf(
"%v %v: %d %v",
r.Response.Request.Method, r.Response.Request.URL, r.Response.StatusCode, message,
)
}
// An ErrorResponse reports the error caused by an API request
type ErrorResponse struct {
// HTTP response that caused this error
Response *http.Response `json:"-"`
// Error message
Message string `json:"message"`
}
func (r *ErrorResponse) Error() string {
return fmt.Sprintf(
"%v %v: %d %v",
r.Response.Request.Method, r.Response.Request.URL, r.Response.StatusCode, r.Message,
)
}