119 lines
2.5 KiB
Go
119 lines
2.5 KiB
Go
package shared
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import (
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"bytes"
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"encoding/json"
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"fmt"
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"strconv"
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"strings"
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"gitea.maximumdirect.net/eric/notarius/internal/core/source"
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)
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type UnitRef struct {
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value int
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fromNumber bool
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}
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type SourceRefResponse struct {
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SourceID string `json:"source_id"`
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StartUnitID UnitRef `json:"start_unit_id"`
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EndUnitID UnitRef `json:"end_unit_id"`
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}
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func UnitRefFromString(value string) UnitRef {
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parsed, _ := parseUnitRefNumber(value)
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return UnitRef{value: parsed}
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}
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func UnitRefFromInt(value int) UnitRef {
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return UnitRef{
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value: value,
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fromNumber: true,
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}
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}
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func (ref UnitRef) String() string {
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if ref.value == 0 {
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return ""
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}
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return strconv.Itoa(ref.value)
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}
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func (ref UnitRef) Int() int {
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return ref.value
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}
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func (ref *UnitRef) UnmarshalJSON(raw []byte) error {
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raw = bytes.TrimSpace(raw)
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if len(raw) == 0 {
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return fmt.Errorf("unit ref must be a string or integer")
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}
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if raw[0] == '"' {
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var value string
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if err := json.Unmarshal(raw, &value); err != nil {
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return err
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}
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number, err := parseUnitRefNumber(value)
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if err != nil {
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return err
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}
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*ref = UnitRef{value: number}
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return nil
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}
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number, err := parseUnitRefNumber(string(raw))
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if err != nil {
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return err
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}
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*ref = UnitRefFromInt(number)
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return nil
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}
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func (ref UnitRef) MarshalJSON() ([]byte, error) {
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if ref.fromNumber {
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return []byte(strconv.Itoa(ref.value)), nil
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}
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return json.Marshal(ref.String())
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}
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func ResolveUnitID(doc *source.SourceDocument, field string, ref UnitRef) (int, error) {
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if ref.value <= 0 {
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return 0, fmt.Errorf("%s must be positive", field)
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}
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if _, ok := source.UnitIndex(doc, ref.value); !ok {
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return 0, fmt.Errorf("%s %d was not found", field, ref.value)
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}
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return ref.value, nil
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}
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func SourceRefCandidate(doc *source.SourceDocument, ref SourceRefResponse) source.SourceRef {
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return source.SourceRef{
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SourceID: strings.TrimSpace(ref.SourceID),
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StartUnitID: unitIDCandidate(ref.StartUnitID),
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EndUnitID: unitIDCandidate(ref.EndUnitID),
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}
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}
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func unitIDCandidate(ref UnitRef) int {
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return ref.value
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}
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func parseUnitRefNumber(value string) (int, error) {
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trimmed := strings.TrimSpace(value)
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if trimmed == "" {
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return 0, fmt.Errorf("unit ref must not be empty")
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}
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if trimmed != value {
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return 0, fmt.Errorf("unit ref must not contain leading or trailing whitespace")
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}
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number, err := strconv.Atoi(value)
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if err != nil {
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return 0, fmt.Errorf("unit ref must be an integer")
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}
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if number <= 0 {
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return 0, fmt.Errorf("unit ref must be positive")
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}
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return number, nil
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}
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