Function fetchExistingIssueFieldValues

pkg/github/issues.go:402–459

fetchExistingIssueFieldValues retrieves the current field values for an issue as IssueRequestFieldValue entries, ready to be merged before an update.

(ctx context.Context, gqlClient *githubv4.Client, owner, repo string, issueNumber int)

// fetchExistingIssueFieldValues retrieves the current field values for an issue
// as IssueRequestFieldValue entries, ready to be merged before an update.
func fetchExistingIssueFieldValues(ctx context.Context, gqlClient *githubv4.Client, owner, repo string, issueNumber int) ([]*github.IssueRequestFieldValue, error) {
	ctxWithFeatures := ghcontext.WithGraphQLFeatures(ctx, "issue_fields", "repo_issue_fields")

	var query struct {
		Repository struct {
			Issue struct {
				IssueFieldValues struct {
					Nodes []IssueFieldValueFragment
				} `graphql:"issueFieldValues(first: 25)"`
			} `graphql:"issue(number: $number)"`
		} `graphql:"repository(owner: $owner, name: $repo)"`
	}

	vars := map[string]any{
		"owner":  githubv4.String(owner),
		"repo":   githubv4.String(repo),
		"number": githubv4.Int(issueNumber), // #nosec G115 - issue numbers are always small positive integers
	}

	if err := gqlClient.Query(ctxWithFeatures, &query, vars); err != nil {
		return nil, fmt.Errorf("failed to fetch existing issue field values: %w", err)
	}

	var result []*github.IssueRequestFieldValue
	for _, node := range query.Repository.Issue.IssueFieldValues.Nodes {
		var fieldIDStr string
		var value any

		switch node.TypeName {
		case "IssueFieldDateValue":
			fieldIDStr = node.DateValue.Field.FullDatabaseIDStr()
			value = string(node.DateValue.Value)
		case "IssueFieldNumberValue":
			fieldIDStr = node.NumberValue.Field.FullDatabaseIDStr()
			value = float64(node.NumberValue.Value)
		case "IssueFieldSingleSelectValue":
			fieldIDStr = node.SingleSelectValue.Field.FullDatabaseIDStr()
			value = string(node.SingleSelectValue.Value)
		case "IssueFieldTextValue":
			fieldIDStr = node.TextValue.Field.FullDatabaseIDStr()
			value = string(node.TextValue.Value)
		default:
			continue
		}

		fieldID := parseFullDatabaseID(fieldIDStr)
		if fieldID == 0 {
			continue
		}

		result = append(result, &github.IssueRequestFieldValue{
			FieldID: fieldID,
			Value:   value,
		})
	}

	return result, nil
}