router: read the hour he said out loud (V-469)

"напомни мне позвонить маме в семь вечера" answered "не получилось разобрать время напоминания", while "в 19:00" set the reminder. Reminders arrive through speech, and speech says the hour in words, so this was the ordinary case failing and the typed one working. SpellOutDigits rewrites a spoken number as digits, but only when a time word stands beside it — "в три часа" becomes "в 3 часа" and "купить три яблока" is left alone. Both parsers see it: dateparser already rewrites "7 вечера" to "7 pm" and never saw a digit to rewrite, and the stub floor now reads the qualifier itself.
2026-08-04 03:46:45 +04:00
parent e481ad4930
commit 442d3ec08e
4 changed files with 177 additions and 4 deletions
@@ -0,0 +1,97 @@
+package router
+
+import "strings"
+
+// ruNumerals — spoken numbers as digits, for the clock hours and the minutes
+// that follow them. Every case ending he might say is listed rather than
+// stemmed: "в семь", "к семи", "около семи" are three forms of one hour, and a
+// prefix rule short enough to cover them also matches "семья".
+//
+// Stops at thirty, which is as far as a spoken time goes ("без двадцати
+// восемь", "в половине шестого"). Anything larger is said in digits.
+var ruNumerals = map[string]string{
+	"один": "1", "одного": "1", "одну": "1", "час": "1", "часу": "1",
+	"два": "2", "две": "2", "двух": "2",
+	"три": "3", "трёх": "3", "трех": "3",
+	"четыре": "4", "четырёх": "4", "четырех": "4",
+	"пять": "5", "пяти": "5",
+	"шесть": "6", "шести": "6",
+	"семь": "7", "семи": "7",
+	"восемь": "8", "восьми": "8",
+	"девять": "9", "девяти": "9",
+	"десять": "10", "десяти": "10",
+	"одиннадцать": "11", "одиннадцати": "11",
+	"двенадцать": "12", "двенадцати": "12",
+	"тринадцать": "13", "тринадцати": "13",
+	"четырнадцать": "14", "четырнадцати": "14",
+	"пятнадцать": "15", "пятнадцати": "15",
+	"шестнадцать": "16", "шестнадцати": "16",
+	"семнадцать": "17", "семнадцати": "17",
+	"восемнадцать": "18", "восемнадцати": "18",
+	"девятнадцать": "19", "девятнадцати": "19",
+	"двадцать": "20", "двадцати": "20",
+	"тридцать": "30", "тридцати": "30",
+	"сорок": "40", "сорока": "40",
+	"пятьдесят": "50", "пятидесяти": "50",
+}
+
+// numeralContext — the words that make a numeral a time. A numeral is only
+// rewritten when one of these sits next to it, so "три яблока" in a note is
+// left alone and "в три часа" is not.
+var numeralContext = map[string]bool{
+	"в": true, "во": true, "к": true, "около": true, "на": true,
+	"часа": true, "часов": true, "час": true, "часу": true,
+	"утра": true, "вечера": true, "дня": true, "ночи": true,
+	"минут": true, "минуты": true, "минуту": true,
+	"at": true, "by": true,
+}
+
+// SpellOutDigits rewrites spoken numbers as digits so the date parsers see the
+// shape they know.
+//
+// "напомни мне позвонить маме в семь вечера" parsed to nothing, while "в 19:00"
+// parsed fine (Vikunja #469). Speech is where reminders come from, and speech
+// says the hour in words, so this is not a long-tail case — it is the ordinary
+// one. dateparser reads "в 7 вечера" through the qualifier rewrite the python
+// script already does; it does not read "в семь вечера".
+//
+// Conservative by construction: a numeral is only rewritten when a time word
+// stands beside it. "три часа" becomes "3 часа"; "три яблока" stays as it is,
+// and a note or a fact carrying a spoken number is untouched.
+func SpellOutDigits(text string) string {
+	toks := strings.Fields(text)
+	if len(toks) == 0 {
+		return text
+	}
+	out := make([]string, len(toks))
+	copy(out, toks)
+	for i, tok := range toks {
+		key := strings.ToLower(strings.Trim(tok, ".,!?;:«»\"'"))
+		digit, ok := ruNumerals[key]
+		if !ok {
+			continue
+		}
+		// "час" and "часу" are the hour noun as often as they are the number
+		// one, and rewriting "в час дня" to "в 1 дня" is right either way. What
+		// must not happen is rewriting the noun that gives another numeral its
+		// context: "в семь часов" must keep "часов".
+		if !hasTimeNeighbour(toks, i) {
+			continue
+		}
+		out[i] = digit
+	}
+	return strings.Join(out, " ")
+}
+
+// hasTimeNeighbour reports whether the token before or after i is a time word.
+func hasTimeNeighbour(toks []string, i int) bool {
+	for _, j := range []int{i - 1, i + 1} {
+		if j < 0 || j >= len(toks) {
+			continue
+		}
+		if numeralContext[strings.ToLower(strings.Trim(toks[j], ".,!?;:«»\"'"))] {
+			return true
+		}
+	}
+	return false
+}