addrkit: deterministic address resolution service (Go)
- domain: address normalization/parsing, matching with explicit statuses - adapters: SQLite registry store, ArcGIS outages client, optional LLM rewriter, HTTP API - seed pipeline with duplicate handling and unparsed reporting - CLI (seed/verify/resolve), systemd unit, OpenAPI contract, tests
This commit is contained in:
Maksim Totmin
@@ -0,0 +1,102 @@
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package address
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import (
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"strings"
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"unicode"
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"golang.org/x/text/cases"
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"golang.org/x/text/unicode/norm"
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)
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// fold is a Unicode-aware case folder. It lower-cases Cyrillic and Latin
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// alike, which is what we want for matching.
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var fold = cases.Fold()
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// NormalizeText folds a free-form string into a canonical form suitable for
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// parsing and matching.
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//
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// The transformation is intentionally lossy:
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// - Unicode NFKC (so lookalike characters collapse);
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// - case folding (so "СТАНИЦИОННАЯ" == "станционная");
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// - "ё" -> "е" (users and ASR disagree about the diaeresis);
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// - dashes and various Unicode spaces are unified;
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// - punctuation that only separates tokens becomes a space;
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// - runs of whitespace collapse to a single space.
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//
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// NormalizeText is idempotent: NormalizeText(NormalizeText(s)) == NormalizeText(s).
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func NormalizeText(s string) string {
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s = norm.NFKC.String(s)
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s = fold.String(s)
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s = strings.ReplaceAll(s, "ё", "е")
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s = mapSeparators(s)
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s = strings.Join(strings.Fields(s), " ")
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return strings.TrimSpace(s)
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}
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// mapSeparators unifies characters that carry no semantic meaning for address
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// matching. It never removes digits, letters or the '/' house separator.
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func mapSeparators(s string) string {
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var b strings.Builder
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b.Grow(len(s))
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for _, r := range s {
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switch {
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case r == '\u00a0' || unicode.IsSpace(r):
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b.WriteByte(' ')
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case isDash(r):
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b.WriteByte('-')
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case isSeparatorPunct(r):
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b.WriteByte(' ')
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default:
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b.WriteRune(r)
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}
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}
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return b.String()
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}
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// isDash reports whether r is one of the many dash-like code points that users
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// and copy-paste bring in: "2–я" with an en dash is still an ordinal.
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func isDash(r rune) bool {
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switch r {
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case '-', '\u2010', '\u2011', '\u2012', '\u2013', '\u2014', '\u2212':
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return true
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default:
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return false
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}
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}
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// isSeparatorPunct reports whether r separates tokens. Dots are included so
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// that abbreviations like "ул." normalize to their stem ("ул").
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func isSeparatorPunct(r rune) bool {
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switch r {
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case '.', ',', ';', '(', ')', '"', '\'', '«', '»', ':', '!', '?':
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return true
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default:
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return false
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}
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}
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// isDigits reports whether s is a non-empty run of ASCII digits.
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func isDigits(s string) bool {
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if s == "" {
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return false
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}
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for _, r := range s {
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if r < '0' || r > '9' {
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return false
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}
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}
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return true
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}
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// trimLeadingZeros removes redundant leading zeros from a numeric token:
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// "007" -> "7". It leaves non-numeric strings untouched.
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func trimLeadingZeros(s string) string {
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if !isDigits(s) {
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return s
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}
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t := strings.TrimLeft(s, "0")
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if t == "" {
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return "0"
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}
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return t
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}
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@@ -0,0 +1,143 @@
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package address
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import (
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"regexp"
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"sort"
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"strings"
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)
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// The house block is parsed from the end of the string, component by
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// component, from the outermost (structure) to the innermost (house). Working
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// right-to-left is what lets us tell a genuine house number apart from a digit
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// that is part of the street name (e.g. "2-я Станционная улица 1/1 стр.").
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var (
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// "... стр." / "... строение 3" / "... сооружение" / "... с 2"
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reStructure = regexp.MustCompile(`(?:^|\s)(?:стр|строение|сооружение|с)\.?\s*(\d+)?$`)
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// "... к9/1" / "... корпус 2а" / "... кД" / "... к 1/4"
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reBuilding = regexp.MustCompile(`(?:^|\s)(?:к|корп|корпус)\.?\s*(\d*)\s*([а-я])?(?:/(\d+)\s*([а-я])?)?$`)
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// "... 1/1" / "... 33а" / "... 12 б" / "... 45а/4" / "... 1/1а"
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reHouse = regexp.MustCompile(`(?:^|\s)(\d+)\s*([а-я])?(?:/(\d+)\s*([а-я])?)?$`)
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// "2-я", "10-й", "3-е"
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reOrdinalToken = regexp.MustCompile(`^(\d+)-[а-я]{1,3}$`)
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)
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// Parse decomposes a free-form address into its structured components. It is
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// total: unparseable input still yields a non-nil ParsedAddress whose street
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// part is best-effort and whose HasHouse is false.
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func Parse(raw string) ParsedAddress {
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normalized := NormalizeText(raw)
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p := ParsedAddress{Raw: raw, Normalized: normalized}
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rest := normalized
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if g, start, ok := matchSuffix(reStructure, rest); ok {
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p.Structure = trimLeadingZeros(g[1])
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rest = strings.TrimSpace(rest[:start])
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}
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if g, start, ok := matchSuffix(reBuilding, rest); ok {
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// The regex also matches a bare "к"; only accept it when a digit or a
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// letter actually follows, otherwise it is not a corpus marker.
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if g[1] != "" || g[2] != "" {
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p.Building = trimLeadingZeros(g[1])
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p.BuildingLetter = firstNonEmpty(g[2], g[4])
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p.BuildingFrac = trimLeadingZeros(g[3])
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rest = strings.TrimSpace(rest[:start])
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}
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}
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if g, start, ok := matchSuffix(reHouse, rest); ok {
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p.House = trimLeadingZeros(g[1])
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p.HouseLetter = firstNonEmpty(g[2], g[4])
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p.HouseFrac = trimLeadingZeros(g[3])
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p.HasHouse = true
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rest = strings.TrimSpace(rest[:start])
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}
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parseStreet(&p, rest)
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return p
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}
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// firstNonEmpty returns the first non-empty argument. House/building letters
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// can appear either before or after the fraction ("45а/4" vs "1/1а").
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func firstNonEmpty(values ...string) string {
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for _, v := range values {
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if v != "" {
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return v
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}
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}
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return ""
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}
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// parseStreet fills the street-related fields of p from the leftover string
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// (the address with its house block removed).
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func parseStreet(p *ParsedAddress, s string) {
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tokens := strings.Fields(s)
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if len(tokens) == 0 {
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p.StreetKey = streetKey("", "")
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return
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}
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name := make([]string, 0, len(tokens))
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typeFound := false
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for _, tok := range tokens {
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// Only the first recognised type token is treated as the type; a
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// second occurrence is part of the name.
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if !typeFound {
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if t, ok := streetTypes[tok]; ok {
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p.StreetType = t
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typeFound = true
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continue
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}
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}
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name = append(name, tok)
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}
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name = extractOrdinal(p, name)
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p.NameDisplay = strings.Join(name, " ")
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sorted := append([]string(nil), name...)
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sort.Strings(sorted)
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p.NameKey = strings.Join(sorted, " ")
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p.StreetKey = streetKey(p.Ordinal, p.NameKey)
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}
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// extractOrdinal recognises a leading ordinal ("2-я", "2 я", "вторая") and
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// removes it from the name tokens.
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func extractOrdinal(p *ParsedAddress, tokens []string) []string {
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if len(tokens) == 0 {
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return tokens
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}
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if m := reOrdinalToken.FindStringSubmatch(tokens[0]); m != nil {
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p.Ordinal = normalizeOrdinal(m[1])
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return tokens[1:]
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}
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if isDigits(tokens[0]) && len(tokens) >= 2 && ordinalSuffixes[tokens[1]] {
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p.Ordinal = normalizeOrdinal(tokens[0])
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return tokens[2:]
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}
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if d, ok := ordinalWords[tokens[0]]; ok {
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p.Ordinal = normalizeOrdinal(d)
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return tokens[1:]
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}
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return tokens
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}
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// matchSuffix returns the capture groups of the match of re that ends exactly
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// at the end of s, together with the byte offset where it starts. Go's regexp
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// is leftmost-first, so we scan all matches and pick the right-anchored one.
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func matchSuffix(re *regexp.Regexp, s string) (groups []string, start int, ok bool) {
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for _, loc := range re.FindAllStringSubmatchIndex(s, -1) {
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if loc[1] != len(s) {
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continue
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}
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n := len(loc) / 2
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groups = make([]string, n)
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for i := 0; i < n; i++ {
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if loc[2*i] >= 0 {
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groups[i] = s[loc[2*i]:loc[2*i+1]]
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}
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}
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return groups, loc[0], true
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}
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return nil, 0, false
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}
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@@ -0,0 +1,148 @@
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package address
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import "testing"
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func TestParseHouseBlock(t *testing.T) {
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tests := []struct {
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name string
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raw string
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wantOrdinal string
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wantName string
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wantType string
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wantHouse string
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wantFrac string
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wantLetter string
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wantBuild string
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wantBFrac string
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wantBLetter string
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wantStruct string
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wantHas bool
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}{
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{
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name: "ordinal, fraction and structure",
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raw: "2-я Станционная улица 1/1 стр.",
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wantOrdinal: "2", wantName: "станционная", wantType: "улица",
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wantHouse: "1", wantFrac: "1", wantStruct: "", wantHas: true,
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},
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{
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name: "building with fraction and structure",
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raw: "Станционная улица 30а к9/1 стр.",
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wantName: "станционная", wantType: "улица",
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wantHouse: "30", wantLetter: "а", wantBuild: "9", wantBFrac: "1", wantHas: true,
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},
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{
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name: "letter glued to house",
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raw: "10-й Бронный переулок 33а",
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wantOrdinal: "10", wantName: "бронный", wantType: "переулок",
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wantHouse: "33", wantLetter: "а", wantHas: true,
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},
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{
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name: "microdistrict, two-word name",
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raw: "Зеленый бор микрорайон 13",
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wantName: "бор зеленый", wantType: "микрорайон",
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wantHouse: "13", wantHas: true,
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},
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{
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name: "spelled-out ordinal",
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raw: "вторая Станционная улица 1",
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wantOrdinal: "2", wantName: "станционная", wantType: "улица",
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wantHouse: "1", wantHas: true,
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},
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{
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name: "en dash variant",
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raw: "2–я Станционная улица 1",
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wantOrdinal: "2", wantName: "станционная", wantType: "улица",
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wantHouse: "1", wantHas: true,
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},
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{
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name: "no house",
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raw: "Станционная улица",
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wantName: "станционная", wantType: "улица", wantHas: false,
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},
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{
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name: "structure with number only",
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raw: "Станционная улица 3 стр.",
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wantName: "станционная", wantType: "улица",
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wantHouse: "3", wantStruct: "", wantHas: true,
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},
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{
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name: "letter before fraction",
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raw: "Выборная улица 45а/4",
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wantName: "выборная", wantType: "улица",
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wantHouse: "45", wantLetter: "а", wantFrac: "4", wantHas: true,
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},
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{
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name: "corpus letter without digit",
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raw: "1-я Ельцовка улица 1 кД",
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wantOrdinal: "1", wantName: "ельцовка", wantType: "улица",
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wantHouse: "1", wantBLetter: "д", wantHas: true,
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},
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}
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for _, tt := range tests {
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t.Run(tt.name, func(t *testing.T) {
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got := Parse(tt.raw)
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if got.Ordinal != tt.wantOrdinal {
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t.Errorf("Ordinal = %q, want %q", got.Ordinal, tt.wantOrdinal)
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}
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if got.NameKey != tt.wantName {
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t.Errorf("NameKey = %q, want %q", got.NameKey, tt.wantName)
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}
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if got.StreetType != tt.wantType {
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t.Errorf("StreetType = %q, want %q", got.StreetType, tt.wantType)
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}
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if got.House != tt.wantHouse {
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t.Errorf("House = %q, want %q", got.House, tt.wantHouse)
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}
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if got.HouseFrac != tt.wantFrac {
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t.Errorf("HouseFrac = %q, want %q", got.HouseFrac, tt.wantFrac)
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}
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if got.HouseLetter != tt.wantLetter {
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t.Errorf("HouseLetter = %q, want %q", got.HouseLetter, tt.wantLetter)
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}
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if got.Building != tt.wantBuild {
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t.Errorf("Building = %q, want %q", got.Building, tt.wantBuild)
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}
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if got.BuildingFrac != tt.wantBFrac {
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t.Errorf("BuildingFrac = %q, want %q", got.BuildingFrac, tt.wantBFrac)
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}
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if got.BuildingLetter != tt.wantBLetter {
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t.Errorf("BuildingLetter = %q, want %q", got.BuildingLetter, tt.wantBLetter)
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}
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if got.Structure != tt.wantStruct {
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t.Errorf("Structure = %q, want %q", got.Structure, tt.wantStruct)
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}
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if got.HasHouse != tt.wantHas {
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t.Errorf("HasHouse = %v, want %v", got.HasHouse, tt.wantHas)
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}
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})
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}
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}
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// TestParseDeterministic guards the core invariant: parsing the same input
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// always yields the same structured result and the same street key.
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func TestParseDeterministic(t *testing.T) {
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input := "2-я Станционная улица 1/1 стр."
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first := Parse(input)
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for i := 0; i < 100; i++ {
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if got := Parse(input); got.StreetKey != first.StreetKey || got.House != first.House {
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t.Fatalf("non-deterministic parse: %+v vs %+v", got, first)
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}
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}
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}
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func TestNormalizeIdempotent(t *testing.T) {
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inputs := []string{
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" 2-Я Станционная\u00a0улица 1/1 стр. ",
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"ЁЛКИ д. 5, кв. 3",
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"СТАНИЦИОННАЯ — улица, 30а",
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"",
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}
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for _, in := range inputs {
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once := NormalizeText(in)
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twice := NormalizeText(once)
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if once != twice {
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t.Errorf("NormalizeText not idempotent for %q: %q != %q", in, once, twice)
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}
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}
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}
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@@ -0,0 +1,66 @@
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package address
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import "strings"
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// streetTypes maps a surface form (including common abbreviations) to a single
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// canonical street type. The type is informational for matching (we strip it
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// from the key) but useful for disambiguation and display.
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var streetTypes = map[string]string{
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"ул": "улица", "улица": "улица",
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"пер": "переулок", "пер-к": "переулок", "переулок": "переулок",
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"пр": "проезд", "проезд": "проезд",
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"пр-т": "проспект", "просп": "проспект", "проспект": "проспект",
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"ш": "шоссе", "шоссе": "шоссе",
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"мкр": "микрорайон", "микрорайон": "микрорайон",
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"туп": "тупик", "тупик": "тупик",
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"спуск": "спуск",
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"б-р": "бульвар", "бул": "бульвар", "бульвар": "бульвар",
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"пл": "площадь", "площадь": "площадь",
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"пос": "поселок", "поселок": "поселок",
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"тракт": "тракт",
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"аллея": "аллея",
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"наб": "набережная", "набережная": "набережная",
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"кольцо": "кольцо",
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"просека": "просека",
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"квартал": "квартал",
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"территория": "территория",
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"дорога": "дорога",
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"разъезд": "разъезд",
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}
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// ordinalWords maps spelled-out ordinals to their digit form. Only the forms
|
||||
// that actually occur in practice are listed; unknown words are treated as
|
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// part of the street name.
|
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var ordinalWords = map[string]string{
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"первый": "1", "первая": "1", "первое": "1",
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"второй": "2", "вторая": "2", "второе": "2",
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"третий": "3", "третья": "3", "третье": "3",
|
||||
"четвертый": "4", "четвертая": "4", "четвертое": "4",
|
||||
"пятый": "5", "пятая": "5", "пятое": "5",
|
||||
"шестой": "6", "шестая": "6", "шестое": "6",
|
||||
"седьмой": "7", "седьмая": "7", "седьмое": "7",
|
||||
"восьмой": "8", "восьмая": "8", "восьмое": "8",
|
||||
"девятый": "9", "девятая": "9", "девятое": "9",
|
||||
"десятый": "10", "десятая": "10", "десятое": "10",
|
||||
}
|
||||
|
||||
// ordinalSuffixes are the gender/number endings that may follow an ordinal
|
||||
// digit when it is written as a separate token ("2 я", "10 й").
|
||||
var ordinalSuffixes = map[string]bool{
|
||||
"я": true, "й": true, "е": true,
|
||||
"ая": true, "ый": true, "ой": true, "ое": true,
|
||||
"ий": true, "ья": true, "ье": true, "ьи": true,
|
||||
}
|
||||
|
||||
// streetKey builds the canonical, type-independent street key:
|
||||
// "<ordinal>|<sorted name tokens>". The type word is dropped so that a user
|
||||
// who omits it ("станционная 1" instead of "Станционная улица 1") still
|
||||
// matches; type confusion is surfaced later as ambiguity.
|
||||
func streetKey(ordinal, nameKey string) string {
|
||||
return ordinal + "|" + nameKey
|
||||
}
|
||||
|
||||
// normalizeOrdinal trims leading zeros so "02-я" and "2-я" agree.
|
||||
func normalizeOrdinal(s string) string {
|
||||
return trimLeadingZeros(strings.TrimSpace(s))
|
||||
}
|
||||
@@ -0,0 +1,89 @@
|
||||
// Package address contains the deterministic address domain: text
|
||||
// normalization, structural parsing and the canonical data types shared by the
|
||||
// rest of addrkit.
|
||||
//
|
||||
// The package is deliberately free of any I/O (no HTTP, no database, no
|
||||
// filesystem). Everything here is a pure function of its inputs, which makes
|
||||
// the core trivially testable and reusable by the service, the CLI and tests.
|
||||
package address
|
||||
|
||||
// Status is the machine-readable outcome of an address resolution.
|
||||
//
|
||||
// It is intentionally explicit: callers must never have to guess whether an
|
||||
// empty result means "not found" or "the upstream failed".
|
||||
type Status string
|
||||
|
||||
const (
|
||||
// StatusFound means the street and the exact house unit were resolved.
|
||||
StatusFound Status = "found"
|
||||
// StatusPartial means the street was resolved but the house unit was not
|
||||
// confirmed. The answer is safe but incomplete; the caller may ask the
|
||||
// user to clarify the house number.
|
||||
StatusPartial Status = "partial"
|
||||
// StatusAmbiguous means more than one plausible match exists and the
|
||||
// resolver refuses to guess.
|
||||
StatusAmbiguous Status = "ambiguous"
|
||||
// StatusNotFound means nothing in the registry matched.
|
||||
StatusNotFound Status = "not_found"
|
||||
// StatusPortalTimeout means the external outages portal did not answer in
|
||||
// time. It is an infrastructure outcome, not "no outages".
|
||||
StatusPortalTimeout Status = "portal_timeout"
|
||||
// StatusInfra is a generic terminal infrastructure failure.
|
||||
StatusInfra Status = "infra_error"
|
||||
)
|
||||
|
||||
// ParsedAddress is the structured form of a free-form address string.
|
||||
//
|
||||
// The parser is lossy on purpose: punctuation, case and spacing are folded
|
||||
// away so that different surface forms of the same address converge on the
|
||||
// same StreetKey.
|
||||
type ParsedAddress struct {
|
||||
Raw string `json:"raw"`
|
||||
Normalized string `json:"normalized"`
|
||||
|
||||
// Street components.
|
||||
//
|
||||
// NameKey is the order-insensitive canonical name (tokens sorted), so
|
||||
// "Станционная 2-я" and "2-я Станционная" produce the same key.
|
||||
Ordinal string `json:"ordinal,omitempty"`
|
||||
NameKey string `json:"name_key,omitempty"`
|
||||
NameDisplay string `json:"name_display,omitempty"`
|
||||
StreetType string `json:"street_type,omitempty"`
|
||||
StreetKey string `json:"street_key"`
|
||||
|
||||
// House unit components. A house "1/1 к2 стр.3" decomposes into
|
||||
// House=1, HouseFrac=1, Building=2, Structure=3.
|
||||
HasHouse bool `json:"has_house"`
|
||||
House string `json:"house,omitempty"`
|
||||
HouseFrac string `json:"house_frac,omitempty"`
|
||||
HouseLetter string `json:"house_letter,omitempty"`
|
||||
Building string `json:"building,omitempty"`
|
||||
BuildingFrac string `json:"building_frac,omitempty"`
|
||||
BuildingLetter string `json:"building_letter,omitempty"`
|
||||
Structure string `json:"structure,omitempty"`
|
||||
}
|
||||
|
||||
// Entry is a single canonical row from the address registry.
|
||||
//
|
||||
// Entries are produced at seed time by parsing the registry's display address
|
||||
// with the very same parser used at query time, so index and query always
|
||||
// agree on how an address is decomposed.
|
||||
type Entry struct {
|
||||
ID string `json:"id"`
|
||||
Address string `json:"address"`
|
||||
District string `json:"district,omitempty"`
|
||||
|
||||
Ordinal string `json:"ordinal,omitempty"`
|
||||
NameKey string `json:"name_key,omitempty"`
|
||||
NameDisplay string `json:"name_display,omitempty"`
|
||||
StreetType string `json:"street_type,omitempty"`
|
||||
StreetKey string `json:"street_key"`
|
||||
|
||||
House string `json:"house,omitempty"`
|
||||
HouseFrac string `json:"house_frac,omitempty"`
|
||||
HouseLetter string `json:"house_letter,omitempty"`
|
||||
Building string `json:"building,omitempty"`
|
||||
BuildingFrac string `json:"building_frac,omitempty"`
|
||||
BuildingLetter string `json:"building_letter,omitempty"`
|
||||
Structure string `json:"structure,omitempty"`
|
||||
}
|
||||
Reference in New Issue
Block a user