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Add API client that reads its key from the environment #19

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Add API client that reads its key from the environment #19

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18 changes: 18 additions & 0 deletions internal/apiclient.go
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Original file line number Diff line number Diff line change
@@ -0,0 +1,18 @@
package internal

import "os"

// APIClient is a minimal client for the (future) demo API.
type APIClient struct {
APIKey string
}

// NewAPIClientFromEnv builds a client using the API key from the
// DEMO_API_KEY environment variable. Returns an error if it's unset.
func NewAPIClientFromEnv() (*APIClient, error) {
key := os.Getenv("DEMO_API_KEY")
if key == "" {
return nil, errMissingAPIKey
}
return &APIClient{APIKey: key}, nil
}
5 changes: 5 additions & 0 deletions internal/errors.go
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Original file line number Diff line number Diff line change
@@ -0,0 +1,5 @@
package internal

import "errors"

var errMissingAPIKey = errors.New("DEMO_API_KEY environment variable is not set")
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