31 lines
929 B
Go
31 lines
929 B
Go
package data
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import (
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"fmt"
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"strconv"
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)
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// Runtime
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/*
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Declare a custom Runtime type, which has the underlying type int32
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(the same as our Movie struct field)
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*/
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type Runtime int32
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// MarshalJSON
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/*
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Implement a MarshalJSON() method on the Runtime type so that it satisfies the json.Marshaler interface. This should return the JSON-encoded value for the movie runtime (in our case, it will return string in the format "<runtime> mins").
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*/
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func (r Runtime) MarshalJSON() ([]byte, error) {
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// Generate a string containing the movie runtime in the required format.
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jsonValue := fmt.Sprintf("%d mins", r)
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// Use the strconv.Quote() function on the string to wrap it in double
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// quotes. It needs to be surrounded by double quotes in order to be
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// a valid *JSON string*.
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quotedJSONValue := strconv.Quote(jsonValue)
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// Convert the quoted string value to a byte slice and return it.
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return []byte(quotedJSONValue), nil
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}
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