+search() {
+ local index="$1" words w num total freq doc date J
+ shift 1; words="$@"
+
+ words="$(printf %s\\n "$words" | awk '
+ BEGIN { # Field separator FS should include punctuation, including Unicode Block U+2000 - U+206F
+ if ( length("¡") == 1 ) # Utf-8 aware AWK
+ FS = "([] \\t\\n\\r!\"#'\''()*+,./:;<=>?\\\\^_`{|}~[-]|%[0-9A-Fa-f]{2}|'"$(printf '[\342\200\200-\342\201\257]')"')+";
+ else # UTF-8 Hack
+ FS = "([] \\t\\n\\r!\"#'\''()*+,./:;<=>?\\\\^_`{|}~[-]|%[0-9A-Fa-f]{2}|'"$(printf '\342\200[\200-\277]|\342\201[\201-\257]')"')+";
+ fi
+ }
+ { for (n = 1; n <= NF; n++) printf "%s ", tolower($n); }
+ ')"
+
+ for w in ${words}; do
+ [ ! -f "${index}/$w" ] && continue
+
+ while read num total freq doc date; do
+ printf '%s-%i %f\n' "${doc}" "${date}" "$freq"
+ done <"${index}/$w"
+ done \
+ | awk '
+ { cnt[$1]++; weight[$1] = weight[$1] ? weight[$1] + $2 : $2; }
+ END { m = 0; for (d in cnt) m = ( m < cnt[d] ) ? cnt[d] : m;
+ for (d in cnt) if ( cnt[d] == m ) printf "%f %s\n", weight[d], d;
+ }
+ ' \
+ | sort -nr \
+ | while read freq doc; do
+ date="${doc##*-}" doc="$(UNSTRING "${doc%-*}")"
+
+ if J="$(DBM "$_records" get "$doc")"; then
+ [ "$date" -eq "$(json_get obj:"$J" _indexdate)" ] \
+ && printf '%f %s %s\n' \
+ "$freq" "$(STRING "$doc")" "$(STRING "$J")"
+ fi
+ done
+}
+
+_INDEX="${PATH_INFO#/}" _INDEX="${_INDEX%%/*}"
+_records="${_DATA}/${_INDEX}/_0_DOCS"
+