43 lines
1.1 KiB
Go
43 lines
1.1 KiB
Go
package api
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// ConstError is a wrapper to set constant errors
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type ConstError string
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// Error implements error
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func (err ConstError) Error() string {
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return string(err)
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}
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// ErrReqParamNotFound is thrown when a request parameter is not found
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const ErrReqParamNotFound = ConstError("request parameter not found")
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// ErrReqParamNotType is thrown when a request parameter is not asked with the right type
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const ErrReqParamNotType = ConstError("request parameter does not fulfills type")
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// RequestParam defines input parameters of an api request
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type RequestParam map[string]interface{}
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// Get returns the raw value (not typed) and an error if not found
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func (rp RequestParam) Get(key string) (interface{}, error) {
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rawValue, found := rp[key]
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if !found {
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return "", ErrReqParamNotFound
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}
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return rawValue, nil
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}
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// GetString returns a string and an error if not found or string
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func (rp RequestParam) GetString(key string) (string, error) {
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rawValue, err := rp.Get(key)
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if err != nil {
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return "", err
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}
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convertedValue, canConvert := rawValue.(string)
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if !canConvert {
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return "", ErrReqParamNotType
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}
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return convertedValue, nil
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}
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