mirror of
https://github.com/warmbly/warmbly.git
synced 2026-10-04 16:02:03 +00:00
Matthew Meszaros
1dbbee61c6
feat: read opt-out replies and serve the unsubscribe page in every tagging language
432 lines
19 KiB
Go
432 lines
19 KiB
Go
package replyclassify
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import (
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"regexp"
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"slices"
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"sort"
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"strings"
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"sync"
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)
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// The offline layers read every reply with the base vocabulary below, and a
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// workspace's tagging languages (models.MailLanguageNames codes) add theirs.
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// A language nobody chose adds no pattern, so it cannot misread anyone's mail.
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// The one exception is the opt-out scan, which always cuts the quote markers
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// of the languages its phrases are in (optOutLanguages in lexicon.go).
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// langRules is one language's vocabulary, as its mail clients and servers
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// write it.
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type langRules struct {
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// quote begins the quoted history under a reply.
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quote []quoteMarker
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// separators are the words inside a dashed original or forwarded line.
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separators []string
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// ooo are away-message subject prefixes, in their own spelling.
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ooo []string
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// cues introduce a return date; inclusive ones name the last day away.
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// Only the base set carries them: nothing passes languages to the
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// return-date reader.
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cues, inclusive []string
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months map[int][]string
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// bounce are non-delivery subject prefixes, lower case.
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bounce []string
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}
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var baseRules = langRules{
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quote: []quoteMarker{
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{re: attribution(`on`, `wrote:`)},
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{re: regexp.MustCompile(`(?i)_{10,}`)},
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{re: regexp.MustCompile(`(?im)^\s*from:\s.+$`)},
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{re: headerBlock(`from`, `sent|date`)},
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{re: attribution(`le`, `a écrit\s*:`)},
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{re: attribution(`am`, `schrieb\b`)},
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{re: attribution(`el`, `escribió\s*:`)},
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{re: attribution(`op`, `schreef\b`)},
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{re: attribution(`il`, `ha scritto\s*:`)},
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},
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separators: []string{`original message`, `forwarded message`},
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ooo: []string{
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// English
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"out of office", "out of the office", "automatic reply", "automated reply",
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"autoreply", "auto-reply", "auto reply", "auto:", "away:", "on vacation:", "vacation reply",
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// German
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"abwesenheit", "abwesend", "automatische antwort", "autom. antwort",
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"ausser haus", "nicht im buero", "im urlaub:",
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// French
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"reponse automatique", "absence du bureau", "message d'absence",
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// Spanish / Portuguese
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"respuesta automatica", "ausencia de la oficina", "ausencia temporal",
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"resposta automatica", "fora do escritorio",
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// Italian
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"risposta automatica", "fuori sede:", "assente dall'ufficio",
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// Dutch
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"automatisch antwoord", "afwezigheid", "afwezigheidsbericht",
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// Nordic / Polish
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"automatiskt svar", "automatisk svar", "autosvar", "fravaer", "fravaersmelding",
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"automatyczna odpowiedz",
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},
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cues: []string{
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// English
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`back on`, `back in the office on`, `back at my desk on`, `be back on`,
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`return on`, `returning on`, `will return on`, `i return on`, `my return on`,
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`returns on`, `available again on`, `reachable again on`, `back from`,
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`until`, `till`, `through`,
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// German
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`zurueck am`, `zurueck ab`, `wieder am`, `wieder ab`, `ab dem`,
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// "ab Montag den 12.10.", "ab Montag, den 12.10." and "ab Montag,
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// 12.10.": the weekday needs "den" or a comma before the date.
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`ab (?:montag|dienstag|mittwoch|donnerstag|freitag)(?:,? de[nm]|, ?)`,
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`wieder erreichbar am`, `wieder erreichbar ab`, `wieder im buero am`,
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`bis einschliesslich`, `bis zum`, `bis`,
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// A calendar week ("ab KW 42"); "Kalenderwoche" reads as "kw".
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`ab kw`, `ab der kw`,
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// French
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`de retour le`, `jusqu'au`, `jusqu au`, `a partir du`,
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// Spanish / Portuguese
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`de vuelta el`, `regreso el`, `hasta el`, `a partir del`,
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`de volta a`, `ate o dia`, `a partir de`,
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// Dutch
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`terug op`, `weer aanwezig op`, `tot en met`,
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// Italian
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`di ritorno il`, `fino al`, `rientro il`,
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},
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inclusive: []string{"through", "bis einschliesslich", "tot en met"},
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months: map[int][]string{
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1: {"january", "jan", "januar", "janvier", "enero", "ene", "janeiro", "januari", "gennaio"},
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2: {"february", "feb", "februar", "fevrier", "febrero", "fevereiro", "februari", "febbraio"},
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3: {"march", "mar", "maerz", "marz", "mars", "marzo", "marco", "maart"},
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4: {"april", "apr", "avril", "abril", "aprile"},
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5: {"may", "mai", "mayo", "maio", "mei", "maggio"},
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6: {"june", "jun", "juni", "juin", "junio", "junho", "giugno"},
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7: {"july", "jul", "juli", "juillet", "julio", "julho", "luglio"},
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8: {"august", "aug", "aout", "agosto", "augustus", "ago"},
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9: {"september", "sep", "sept", "septembre", "septiembre", "setembro", "settembre"},
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10: {"october", "oct", "oktober", "octobre", "octubre", "outubro", "okt", "ottobre"},
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11: {"november", "nov", "novembre", "noviembre", "novembro"},
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12: {"december", "dec", "dezember", "decembre", "diciembre", "dezembro", "dez", "dicembre"},
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},
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}
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// Gmail in Swedish, Danish and Norwegian: "[Den] mån 3 mars 2025 kl 10:12 skrev".
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var nordicAttribution = quoteMarker{re: regexp.MustCompile(`(?i)(^|\s)(den\s+)?(\pL{2,4}\.?,?\s+)?\d{1,2}\.?\s*\pL{3,9}\.?\s+\d{4},?\s+kl\.?\s+\d{1,2}[:.]\d{2}\s[^\n]{0,250}?\bskrev\b`)}
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// Thunderbird in Russian and Ukrainian: "03.03.2025 10:12, Name пишет:".
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var cyrillicAttribution = quoteMarker{re: regexp.MustCompile(`(?i)\d{1,2}[./]\d{1,2}[./]\d{2,4},?\s+\d{1,2}:\d{2},\s[^\n]{0,200}?\s(пишет|пише|написал(\(а\))?|написав(\(ла\))?)\s*:`), lineStart: true}
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// gmailSigned is Gmail's attribution in the languages whose verb follows the
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// quoted address: "<date> Anna <anna@example.com> kirjutas:".
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func gmailSigned(verbs string) quoteMarker {
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return quoteMarker{re: regexp.MustCompile(`(?i)@[^\n]{0,120}?[>)]\s*[^\n]{0,30}?(` + verbs + `)\s*[:：]`), lineStart: true}
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}
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var languageRules = map[string]langRules{
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"de": {
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// GMX and web.de put the date first: "Gesendet: ... Von: ...".
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quote: []quoteMarker{{re: headerBlock(`von`, `gesendet|datum`)}, {re: headerBlock(`gesendet`, `von`)}},
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separators: []string{`ursprüngliche nachricht`, `original-nachricht`, `weitergeleitete nachricht`},
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},
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"fr": {
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quote: []quoteMarker{{re: headerBlock(`de ?`, `envoyé ?|date ?`)}},
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separators: []string{`message d'origine`, `message transféré`},
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ooo: []string{"absent du bureau", "absente du bureau"},
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},
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"es": {
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quote: []quoteMarker{{re: headerBlock(`de`, `enviado|fecha`)}},
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separators: []string{`mensaje original`, `mensaje reenviado`},
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ooo: []string{"fuera de la oficina"},
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bounce: []string{"no se puede entregar"},
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},
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"pt": {
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quote: []quoteMarker{
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{re: attribution(`em`, `escreveu\s*:`)},
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{re: headerBlock(`de`, `enviado|enviada em|data`)},
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},
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separators: []string{`mensagem original`, `mensagem encaminhada`},
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bounce: []string{"não é possível entregar"},
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},
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"it": {
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quote: []quoteMarker{{re: headerBlock(`da`, `inviato|data`)}},
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separators: []string{`messaggio originale`, `messaggio inoltrato`},
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ooo: []string{"fuori ufficio"},
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bounce: []string{"non recapitabile"},
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},
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"nl": {
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quote: []quoteMarker{{re: headerBlock(`van`, `verzonden|datum`)}},
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separators: []string{`oorspronkelijk bericht`, `doorgestuurd bericht`},
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ooo: []string{"buiten kantoor"},
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bounce: []string{"onbestelbaar"},
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},
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"sv": {
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quote: []quoteMarker{nordicAttribution, {re: headerBlock(`från`, `skickat|datum`)}},
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separators: []string{`ursprungligt meddelande`, `vidarebefordrat meddelande`},
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ooo: []string{"frånvaro"},
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},
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"da": {
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quote: []quoteMarker{nordicAttribution, {re: headerBlock(`fra`, `sendt|dato`)}},
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separators: []string{`oprindelig meddelelse`, `videresendt meddelelse`},
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},
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"nb": {
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quote: []quoteMarker{nordicAttribution, {re: headerBlock(`fra`, `sendt|dato`)}},
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separators: []string{`opprinnelig melding`, `videresendt melding`},
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},
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"fi": {
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quote: []quoteMarker{
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{re: regexp.MustCompile(`(?i)\d{4}\s+klo\s+\d{1,2}[:.]\d{2}\s[^\n]{0,250}?\skirjoitti\s*:`), lineStart: true},
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{re: headerBlock(`lähettäjä`, `lähetetty|päivämäärä`)},
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},
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separators: []string{`alkuperäinen viesti`, `välitetty viesti`},
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ooo: []string{"automaattinen vastaus", "poissa toimistolta"},
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},
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"pl": {
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quote: []quoteMarker{
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{re: regexp.MustCompile(`(?i)\d{4},?\s+o\s+\d{1,2}:\d{2}\s[^\n]{0,250}?\snapisał(\(a\))?\s*:`), lineStart: true},
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{re: attribution(`w dniu`, `(napisał(\(a\))?|pisze)\s*:`)},
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{re: headerBlock(`od`, `wysłano|data`)},
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},
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separators: []string{`oryginalna wiadomość`, `wiadomość oryginalna`, `wiadomość przekazana`},
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ooo: []string{"odpowiedź automatyczna", "poza biurem"},
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},
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"cs": {
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quote: []quoteMarker{
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{re: regexp.MustCompile(`(?i)\d{4}\s+v\s+\d{1,2}:\d{2}\s+odesílatel\s`), lineStart: true},
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{re: headerBlock(`od`, `odesláno|datum`)},
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},
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separators: []string{`původní zpráva`, `přeposlaná zpráva`},
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ooo: []string{"automatická odpověď", "mimo kancelář"},
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},
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"ro": {
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quote: []quoteMarker{{re: attribution(`pe`, `a scris\s*:`)}, {re: headerBlock(`de la`, `trimis|data`)}},
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separators: []string{`mesaj original`, `mesaj redirecționat`},
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ooo: []string{"răspuns automat", "în afara biroului"},
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},
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"hu": {
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quote: []quoteMarker{
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{re: regexp.MustCompile(`(?i)\sezt írta\s*\(időpont:`), lineStart: true},
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{re: regexp.MustCompile(`(?i)\skeltezéssel,[^\n]{0,250}?\sírta\s*:`), lineStart: true},
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{re: headerBlock(`feladó`, `elküldve|dátum`)},
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},
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separators: []string{`eredeti üzenet`, `továbbított üzenet`},
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ooo: []string{"automatikus válasz", "házon kívül"},
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},
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"ru": {
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quote: []quoteMarker{
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{re: regexp.MustCompile(`(?i)\d{4}\s*г\.\s+в\s+\d{1,2}:\d{2},\s[^\n]{0,200}?<[^<>\n]*@[^<>\n]*>\s*:`), lineStart: true},
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cyrillicAttribution,
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{re: headerBlock(`от`, `отправлено|дата`)},
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},
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separators: []string{`исходное сообщение`, `пересылаемое сообщение`},
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ooo: []string{"автоматический ответ", "автоответ", "вне офиса"},
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},
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"uk": {
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quote: []quoteMarker{
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{re: regexp.MustCompile(`(?i)\d{4}\s*р\.\s+о\s+\d{1,2}:\d{2}\s[^\n]{0,250}?\sпише\s*:`), lineStart: true},
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cyrillicAttribution,
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{re: headerBlock(`від`, `надіслано|дата`)},
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},
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separators: []string{`оригінальне повідомлення`, `переслане повідомлення`},
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ooo: []string{"автоматична відповідь", "поза офісом"},
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},
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"el": {
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quote: []quoteMarker{
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{re: regexp.MustCompile(`(?i)(^|\s)στις\s[^\n]{0,250}?@[^\n]{0,80}?>\s*έγραψε\s*:`)},
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{re: headerBlock(`από`, `στάλθηκε|ημερομηνία`)},
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},
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separators: []string{`αρχικό μήνυμα`, `προωθημένο μήνυμα`},
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ooo: []string{"αυτόματη απάντηση", "εκτός γραφείου"},
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},
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"tr": {
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quote: []quoteMarker{
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{re: regexp.MustCompile(`(?i)@[^\n]{0,80}?\d{1,2}:\d{2}\s+tarihinde\s+şunu\s+yazdı\s*:`), lineStart: true},
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{re: headerBlock(`kimden`, `gönderildi|gönderilme tarihi|tarih`)},
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},
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separators: []string{`özgün ileti`, `orijinal mesaj`, `iletilen ileti`},
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ooo: []string{"otomatik yanıt", "otomatik cevap", "ofis dışında"},
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},
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"ja": {
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quote: []quoteMarker{
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{re: regexp.MustCompile(`\d{4}年\s?\d{1,2}月\s?\d{1,2}日\s*[(（][^)）\n]{1,4}[)）]\s*\d{1,2}:\d{2}\s[^\n]{0,200}?<[^<>\n]*@[^<>\n]*>\s*[:：]`), lineStart: true},
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{re: regexp.MustCompile(`(?s)差出人\s?[:：].{1,300}?\s(送信日時|日付)\s?[:：]`)},
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},
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separators: []string{`元のメッセージ`, `転送されたメッセージ`},
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ooo: []string{"自動応答", "自動返信", "不在通知", "不在のお知らせ"},
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},
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"zh": {
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quote: []quoteMarker{
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{re: regexp.MustCompile(`[于於]\s?\d{4}年\s?\d{1,2}月\s?\d{1,2}日[^\n]{0,40}?[写寫]道\s?[:：]`), lineStart: true},
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{re: regexp.MustCompile(`(?s)(发件人|寄件者)\s?[:：].{1,300}?\s(发送时间|寄件日期|日期)\s?[:：]`)},
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},
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separators: []string{`原始邮件`, `原始郵件`, `转发的邮件`, `已轉寄郵件`},
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ooo: []string{"自动回复", "自动答复", "自動回覆", "自動回复"},
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},
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"ko": {
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quote: []quoteMarker{
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{re: regexp.MustCompile(`\d{4}년\s*\d{1,2}월\s*\d{1,2}일[^\n]{0,150}?님이\s?작성\s*:`), lineStart: true},
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{re: regexp.MustCompile(`(?s)보낸\s?사람\s?:.{1,300}?\s보낸\s?날짜\s?:`)},
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},
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separators: []string{`원본 메시지`, `전달된 메시지`},
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ooo: []string{"자동 회신", "자동 응답", "부재중"},
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},
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"id": {
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quote: []quoteMarker{{re: attribution(`pada`, `menulis\s*:`)}, {re: headerBlock(`dari`, `dikirim|tanggal`)}},
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separators: []string{`pesan asli`, `pesan yang diteruskan`},
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ooo: []string{"balasan otomatis", "di luar kantor"},
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},
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"vi": {
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quote: []quoteMarker{{re: attribution(`vào`, `đã viết\s*:`)}, {re: headerBlock(`từ`, `đã gửi|ngày`)}},
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separators: []string{`tin nhắn gốc`, `thư được chuyển tiếp`},
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ooo: []string{"trả lời tự động"},
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},
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"th": {
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quote: []quoteMarker{{re: attribution(`เมื่อ`, `เขียนว่า\s*:`)}},
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ooo: []string{"ตอบกลับอัตโนมัติ"},
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},
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"hi": {
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quote: []quoteMarker{{re: regexp.MustCompile(`\d{4}\s+को[^\n]{0,200}?@[^\n]{0,80}?\sने\s+लिखा\s*:`), lineStart: true}},
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ooo: []string{"स्वचालित उत्तर"},
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},
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"ar": {
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quote: []quoteMarker{
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{re: regexp.MustCompile(`(^|\s)في\s[^\n]{0,250}?\d{1,2}:\d{2}[^\n]{0,40}?\sكتب\s[^\n]{0,120}?@[^\n]{0,80}?>\s*:`)},
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{re: headerBlock(`من`, `تاريخ الإرسال|أرسل|التاريخ`)},
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},
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separators: []string{`الرسالة الأصلية`, `رسالة معاد توجيهها`},
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ooo: []string{"رد تلقائي", "خارج المكتب"},
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},
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"he": {
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quote: []quoteMarker{
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{re: regexp.MustCompile(`בתאריך[^\n]{0,150}?\d{4}[^\n]{0,80}?\sמאת\s[^\n]{0,120}?@[^\n]{0,80}?>`), lineStart: true},
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{re: headerBlock(`מאת`, `נשלח|תאריך`)},
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},
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separators: []string{`הודעה מקורית`, `הודעה שהועברה`},
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ooo: []string{"תשובה אוטומטית", "מחוץ למשרד"},
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},
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"bg": {
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quote: []quoteMarker{gmailSigned(`написа`), {re: headerBlock(`от`, `изпратено|дата`)}},
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separators: []string{`оригинално съобщение`, `препратено съобщение`},
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},
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"bn": {quote: []quoteMarker{gmailSigned(`লিখেছেন`)}},
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"ca": {
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quote: []quoteMarker{gmailSigned(`va escriure`), {re: headerBlock(`de`, `enviat( el)?|data`)}},
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separators: []string{`missatge original`, `missatge reenviat`},
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},
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"et": {
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quote: []quoteMarker{gmailSigned(`kirjutas`), {re: headerBlock(`saatja`, `saadetud|kuupäev`)}},
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separators: []string{`algne sõnum`, `edasisaadetud sõnum`},
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},
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"fa": {quote: []quoteMarker{gmailSigned(`نوشت`), {re: headerBlock(`از`, `ارسال شده|تاریخ`)}}},
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"fil": {quote: []quoteMarker{gmailSigned(`sumulat`)}},
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"hr": {
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quote: []quoteMarker{gmailSigned(`(je\s+)?napisa(o|la)(/la)?(\s+je)?`), {re: headerBlock(`šalje|od`, `poslano|datum`)}},
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separators: []string{`izvorna poruka`, `proslijeđena poruka`},
|
||
},
|
||
"lt": {
|
||
quote: []quoteMarker{gmailSigned(`rašė`), {re: headerBlock(`nuo`, `išsiųsta|data`)}},
|
||
separators: []string{`pradinis laiškas`, `persiųstas laiškas`},
|
||
},
|
||
"lv": {
|
||
quote: []quoteMarker{gmailSigned(`rakstīja`), {re: headerBlock(`no`, `nosūtīts|datums`)}},
|
||
separators: []string{`sākotnējais ziņojums`, `pārsūtīts ziņojums`},
|
||
},
|
||
"ms": {
|
||
quote: []quoteMarker{gmailSigned(`menulis`), {re: headerBlock(`daripada`, `dihantar|tarikh`)}},
|
||
separators: []string{`mesej asal`, `mesej dimajukan`},
|
||
},
|
||
"sk": {
|
||
quote: []quoteMarker{gmailSigned(`napísal(\(a\)|a)?`), {re: headerBlock(`od`, `odoslané|dátum`)}},
|
||
separators: []string{`pôvodná správa`, `preposlaná správa`},
|
||
},
|
||
"sl": {
|
||
quote: []quoteMarker{gmailSigned(`(je\s+)?napisal(\(-?a\)|a)?`), {re: headerBlock(`od`, `poslano|datum`)}},
|
||
separators: []string{`izvirno sporočilo`, `posredovano sporočilo`},
|
||
},
|
||
"sr": {
|
||
quote: []quoteMarker{
|
||
gmailSigned(`(је\s+|je\s+)?(написао|написала|napisao|napisala)(/ла|/la)?(\s+је|\s+je)?`),
|
||
{re: headerBlock(`од|od`, `послато|послано|poslato|poslano|датум|datum`)},
|
||
},
|
||
separators: []string{`оригинална порука`, `originalna poruka`, `прослеђена порука`, `prosleđena poruka`},
|
||
},
|
||
"sw": {quote: []quoteMarker{gmailSigned(`aliandika`)}},
|
||
"ta": {quote: []quoteMarker{gmailSigned(`எழுதியது`)}},
|
||
"ur": {quote: []quoteMarker{gmailSigned(`نے لکھا`)}},
|
||
}
|
||
|
||
// LanguagesWithRules lists the codes that add offline vocabulary, sorted.
|
||
func LanguagesWithRules() []string {
|
||
out := make([]string, 0, len(languageRules))
|
||
for code := range languageRules {
|
||
out = append(out, code)
|
||
}
|
||
sort.Strings(out)
|
||
return out
|
||
}
|
||
|
||
// ruleSet is the compiled vocabulary for one combination of languages.
|
||
type ruleSet struct {
|
||
quote []quoteMarker
|
||
ooo []string
|
||
cue *regexp.Regexp
|
||
inclusive map[string]bool
|
||
months map[string]int
|
||
bounce []string
|
||
}
|
||
|
||
var ruleSets sync.Map // sorted codes joined by "," -> *ruleSet
|
||
|
||
// rulesFor is the base vocabulary plus the given languages'. Unknown codes,
|
||
// and codes that add nothing, share the base set.
|
||
func rulesFor(langs []string) *ruleSet {
|
||
var codes []string
|
||
for _, l := range langs {
|
||
l = strings.ToLower(strings.TrimSpace(l))
|
||
if _, ok := languageRules[l]; ok && !slices.Contains(codes, l) {
|
||
codes = append(codes, l)
|
||
}
|
||
}
|
||
sort.Strings(codes)
|
||
key := strings.Join(codes, ",")
|
||
if rs, ok := ruleSets.Load(key); ok {
|
||
return rs.(*ruleSet)
|
||
}
|
||
parts := []langRules{baseRules}
|
||
for _, c := range codes {
|
||
parts = append(parts, languageRules[c])
|
||
}
|
||
rs := compileRules(parts)
|
||
actual, _ := ruleSets.LoadOrStore(key, rs)
|
||
return actual.(*ruleSet)
|
||
}
|
||
|
||
func compileRules(parts []langRules) *ruleSet {
|
||
rs := &ruleSet{inclusive: map[string]bool{}, months: map[string]int{}}
|
||
var separators, cues []string
|
||
for _, p := range parts {
|
||
rs.quote = append(rs.quote, p.quote...)
|
||
separators = append(separators, p.separators...)
|
||
for _, m := range p.ooo {
|
||
rs.ooo = append(rs.ooo, foldAccents(m))
|
||
}
|
||
cues = append(cues, p.cues...)
|
||
for _, c := range p.inclusive {
|
||
rs.inclusive[c] = true
|
||
}
|
||
for month, names := range p.months {
|
||
for _, n := range names {
|
||
rs.months[n] = month
|
||
}
|
||
}
|
||
rs.bounce = append(rs.bounce, p.bounce...)
|
||
}
|
||
rs.quote = append(rs.quote, quoteMarker{re: regexp.MustCompile(`(?i)-{2,}\s*(` + strings.Join(separators, `|`) + `)\s*-{2,}`)})
|
||
rs.cue = regexp.MustCompile(`(?i)\b(` + strings.Join(longestFirst(cues), `|`) + `)\b`)
|
||
return rs
|
||
}
|
||
|
||
// longestFirst orders alternatives so a longer cue wins over a cue it starts
|
||
// with: "till och med" is inclusive, "till" is not.
|
||
func longestFirst(in []string) []string {
|
||
out := append([]string(nil), in...)
|
||
sort.SliceStable(out, func(i, j int) bool { return len(out[i]) > len(out[j]) })
|
||
return out
|
||
}
|