mirror of
https://github.com/edgelesssys/constellation.git
synced 2024-12-25 23:49:37 -05:00
48 lines
1.5 KiB
Go
48 lines
1.5 KiB
Go
package client
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import (
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"fmt"
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"math"
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"regexp"
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"strconv"
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)
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var (
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numberedNameRegex = regexp.MustCompile(`^(.+)-(\d+)$`)
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instanceTemplateIDRegex = regexp.MustCompile(`projects/([^/]+)/global/instanceTemplates/([^/]+)`)
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)
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// generateInstanceTemplateName generates a unique name for an instance template by incrementing a counter.
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// The name is in the format <prefix>-<counter>.
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func generateInstanceTemplateName(last string) (string, error) {
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if len(last) > 0 && last[len(last)-1] == '-' {
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return last + "1", nil
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}
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matches := numberedNameRegex.FindStringSubmatch(last)
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if len(matches) != 3 {
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return last + "-1", nil
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}
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n, err := strconv.Atoi(matches[2])
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if err != nil {
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return "", err
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}
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if n < 1 || n == math.MaxInt {
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return "", fmt.Errorf("invalid counter: %v", n)
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}
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return matches[1] + "-" + strconv.Itoa(n+1), nil
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}
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// splitInstanceTemplateID splits an instance template ID into its project and name components.
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func splitInstanceTemplateID(instanceTemplateID string) (project, templateName string, err error) {
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matches := instanceTemplateIDRegex.FindStringSubmatch(instanceTemplateID)
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if len(matches) != 3 {
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return "", "", fmt.Errorf("error splitting instanceTemplateID: %v", instanceTemplateID)
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}
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return matches[1], matches[2], nil
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}
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// joinInstanceTemplateURI joins a project and template name into an instance template URI.
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func joinInstanceTemplateURI(project, templateName string) string {
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return fmt.Sprintf("https://www.googleapis.com/compute/v1/projects/%v/global/instanceTemplates/%v", project, templateName)
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}
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