class Xow_search_scanner {
private final List_adp tkns = List_adp_.new_();
private byte[] src;
private int src_len, pos, txt_bgn;
private final Ordered_hash tmp_list = Ordered_hash_.new_();
private final Bry_bfr tmp_bfr = Bry_bfr.new_();
public Xow_search_tkn[] Scan(byte[] src) {
this.src = src;
this.src_len = src.length;
tkns.Clear();
pos = 0;
txt_bgn = -1;
while (pos < src_len) {
byte cur_b = src[pos];
Object cur_obj = trie.Match_bgn_w_byte(cur_b, src, pos, src_len);
if (cur_obj == null) { // text character
if (txt_bgn == -1) txt_bgn = pos; // 1st character not set; set it
++pos;
} else { // AND, OR, (, ), -, \s, "
int pos_end = trie.Match_pos();
byte cur_tid = ((Byte_obj_val) cur_obj).Val();
if (Cur_join_is_word(cur_tid, pos_end))
continue; // ignore words containing "and", "or"; EX: "random"; "for"
if (txt_bgn != -1) { // pending word; create
Tkns_add_word(Xow_search_tkn.Tid_word, txt_bgn, pos);
txt_bgn = -1;
}
switch (cur_tid) {
case Xow_search_tkn.Tid_space: // discard spaces
pos = Bry_finder.Find_fwd_while(src, pos, src_len, Byte_ascii.Space);
break;
case Xow_search_tkn.Tid_quote: // find end quote and add as word
int quote_bgn = pos + 1;
int quote_end = Bry_finder.Find_fwd(src, Byte_ascii.Quote, quote_bgn, src_len);
if (quote_end == Bry_.NotFound)
throw Err_.new_fmt_("could not find end quote: {0}", String_.new_u8(src));
Tkns_add_word(Xow_search_tkn.Tid_word_quoted, quote_bgn, quote_end);
pos = quote_end + 1; // +1 to place after quote
break;
case Xow_search_tkn.Tid_not:
Tkns_add_word(Xow_search_tkn.Tid_not, pos, pos_end);
pos = pos_end;
break;
case Xow_search_tkn.Tid_paren_bgn:
case Xow_search_tkn.Tid_paren_end:
case Xow_search_tkn.Tid_and:
case Xow_search_tkn.Tid_or:
tkns.Add(new_tkn(cur_tid, pos, pos_end));
pos = pos_end;
break;
default:
throw Err_.unhandled(cur_tid);
}
}
}
if (txt_bgn != -1) { // pending word; create
Tkns_add_word(Xow_search_tkn.Tid_word, txt_bgn, pos);
txt_bgn = -1;
}
return (Xow_search_tkn[]) tkns.To_ary_and_clear(Xow_search_tkn.class);
}
private boolean Cur_join_is_word(
byte cur_tid,
int
pos_end) { // extra logic to handle and / or occuring in unquoted strings; EX: "random";
// "for"
switch (cur_tid) {
default:
return false; // only look at AND, OR, -
case Xow_search_tkn.Tid_and:
case Xow_search_tkn.Tid_or:
case Xow_search_tkn.Tid_not:
break;
}
boolean join_is_word = true;
if (txt_bgn == -1) { // no pending word;
if (cur_tid == Xow_search_tkn.Tid_not)
return false; // NOT is only operator if no pending tkn; EX: -abc -> NOT abc; a-b -> a-b
byte nxt_b = pos_end < src_len ? src[pos_end] : Byte_ascii.Nil;
Object nxt_obj = trie.Match_bgn_w_byte(nxt_b, src, pos_end, src_len);
if (nxt_obj == null) // next tkn is text; join must be word
join_is_word = true;
else { // next tkn is tkn
byte nxt_tid = ((Byte_obj_val) nxt_obj).Val();
switch (nxt_tid) {
case Xow_search_tkn.Tid_space:
case Xow_search_tkn.Tid_quote:
case Xow_search_tkn.Tid_paren_bgn:
case Xow_search_tkn.Tid_paren_end:
join_is_word =
false; // next tkn is sym; and/or is not word; EX: a AND ; a AND"b"; a AND(b)
break;
case Xow_search_tkn.Tid_not:
case Xow_search_tkn.Tid_and:
case Xow_search_tkn.Tid_or:
join_is_word = true; // next tkn is and or not; and/or is word; EX: andor; oror; or-abc;
break;
default:
throw Err_.unhandled(cur_tid);
}
}
} else { // pending word; cur join must be word; EX: "grand": "and" invoked and "gr" pending
join_is_word = true;
}
if (join_is_word) {
if (txt_bgn == -1) txt_bgn = pos; // 1st character not set; set it
pos = pos_end;
return true;
}
if (txt_bgn != -1) {
Tkns_add_word(Xow_search_tkn.Tid_word, txt_bgn, pos); // create word
txt_bgn = -1;
}
return false;
}
private void Tkns_add_word(byte tid, int src_bgn, int src_end) {
if (tkns.Count() > 0) { // at least 1 tkn; check for "auto-and"
Xow_search_tkn last_tkn = (Xow_search_tkn) tkns.Get_at_last();
if (last_tkn.Tid()
== Xow_search_tkn.Tid_word) // previous tkn is word; auto "AND" words; EX: A B -> A AND B
tkns.Add(Xow_search_tkn.new_bry(Xow_search_tkn.Tid_and, Bry_and));
}
if (tid
== Xow_search_tkn
.Tid_word) { // if word has symbol, convert to quoted; EX: a-b should become "a-b";
// otherwise searcher would search for a single word a-b
byte[] cur_word = Bry_.Mid(src, src_bgn, src_end);
byte[][] words =
gplx.xowa.bldrs.cmds.texts.Xob_search_base.Split_ttl_into_words(
null, tmp_list, tmp_bfr, cur_word);
int words_len = words.length;
if (words_len == 1 // only one word
&& !Bry_.Eq(words[0], cur_word) // split word not same as raw
&& Bry_finder.Find_fwd(cur_word, Byte_ascii.Star) == -1 // no asterisk
) {
tkns.Add(Xow_search_tkn.new_bry(tid, words[0]));
return;
}
if (words.length > 1) // multiple words; add as quoted-term; EX: "a-b"
tid = Xow_search_tkn.Tid_word_quoted;
}
tkns.Add(new_tkn(tid, src_bgn, src_end));
}
private Xow_search_tkn new_tkn(byte tid, int val_bgn, int val_end) {
return Xow_search_tkn.new_pos(tid, val_bgn, val_end);
}
private static final byte[] Bry_and = Bry_.new_a7("AND");
private static final Btrie_slim_mgr trie =
Btrie_slim_mgr.ci_ascii_() // NOTE:ci.ascii:OR / AND only
.Add_str_byte(" ", Xow_search_tkn.Tid_space)
.Add_str_byte("\"", Xow_search_tkn.Tid_quote)
.Add_str_byte("-", Xow_search_tkn.Tid_not)
.Add_str_byte("(", Xow_search_tkn.Tid_paren_bgn)
.Add_str_byte(")", Xow_search_tkn.Tid_paren_end)
.Add_str_byte("or", Xow_search_tkn.Tid_or)
.Add_str_byte("and", Xow_search_tkn.Tid_and);
}
public class Wdata_itemByTitle_page implements Xows_page {
private Xoa_url_arg_hash arg_hash = new Xoa_url_arg_hash();
private static final byte[] Arg_site = Bry_.new_a7("site"), Arg_page = Bry_.new_a7("page");
public Bry_fmtr Html_fmtr() {
return html_fmtr;
}
private Wdata_itemByTitle_cfg cfg;
public Xows_special_meta Special_meta() {
return Xows_special_meta_.Itm__item_by_title;
}
public void Special_gen(Xowe_wiki wiki, Xoae_page page, Xoa_url url, Xoa_ttl ttl) {
if (cfg == null)
cfg =
(Wdata_itemByTitle_cfg) wiki.Appe().Special_mgr().Get_or_null(Wdata_itemByTitle_cfg.Key);
// Special:ItemByTitle/enwiki/Earth -> www.wikidata.org/wiki/Q2
Gfo_usr_dlg usr_dlg = wiki.Appe().Usr_dlg();
byte[] site_bry = cfg.Site_default();
byte[] page_bry = Bry_.Empty;
byte[] raw_bry = ttl.Full_txt_wo_qarg(); // EX: enwiki/Earth
int args_len = url.Args().length;
if (args_len > 0) {
arg_hash.Load(url);
site_bry = arg_hash.Get_val_bry_or(Arg_site, Bry_.Empty);
page_bry = arg_hash.Get_val_bry_or(Arg_page, Bry_.Empty);
}
int site_bgn = Bry_finder.Find_fwd(raw_bry, Xoa_ttl.Subpage_spr);
if (site_bgn != Bry_.NotFound) { // leaf arg is available
int page_bgn = Bry_finder.Find_fwd(raw_bry, Xoa_ttl.Subpage_spr, site_bgn + 1);
int raw_bry_len = raw_bry.length;
if (page_bgn != Bry_.NotFound
&& page_bgn < raw_bry_len) { // pipe is found and not last char (EX: "enwiki/" is invalid
site_bry = Bry_.Mid(raw_bry, site_bgn + 1, page_bgn);
page_bry = Bry_.Mid(raw_bry, page_bgn + 1, raw_bry_len);
}
}
Xoae_app app = wiki.Appe();
if (Bry_.Len_gt_0(site_bry) && Bry_.Len_gt_0(page_bry))
if (Navigate(usr_dlg, app, app.Wiki_mgr().Wdata_mgr(), page, site_bry, page_bry)) return;
Bry_bfr tmp_bfr = wiki.Utl__bfr_mkr().Get_k004();
html_fmtr.Bld_bfr_many(
tmp_bfr,
"Search for items by site and title",
"Site",
site_bry,
"Page",
page_bry,
"Search");
page.Data_raw_(tmp_bfr.To_bry_and_rls());
page.Html_data().Html_restricted_n_(); // [[Special:]] pages allow all HTML
}
private static boolean Navigate(
Gfo_usr_dlg usr_dlg,
Xoae_app app,
Wdata_wiki_mgr wdata_mgr,
Xoae_page page,
byte[] site_bry,
byte[] page_bry) {
page_bry =
Xoa_app_.Utl__encoder_mgr()
.Http_url()
.Decode(page_bry); // NOTE: space is converted to + on postback to url; decode
byte[] wiki_domain = Xow_wiki_alias.Parse_wmf_key(site_bry);
if (wiki_domain == null) {
usr_dlg.Warn_many("", "", "site_bry parse failed; site_bry:~{0}", String_.new_u8(site_bry));
return false;
}
Xowe_wiki wiki = app.Wiki_mgr().Get_by_key_or_make(wiki_domain);
if (wiki == null) {
usr_dlg.Warn_many(
"", "", "wiki_domain does not exist; wiki_domain:~{0}", String_.new_u8(wiki_domain));
return false;
}
Xoa_ttl wdata_ttl = Xoa_ttl.parse_(wiki, page_bry);
if (wdata_ttl == null) {
usr_dlg.Warn_many("", "", "ttl is invalid; ttl:~{0}", String_.new_u8(page_bry));
return false;
}
Wdata_doc doc = wdata_mgr.Pages_get(wiki, wdata_ttl);
if (doc == null) {
usr_dlg.Warn_many(
"", "", "ttl cannot be found in wikidata; ttl:~{0}", String_.new_u8(wdata_ttl.Raw()));
return false;
}
byte[] qid_bry = doc.Qid();
Xoae_page qid_page = wdata_mgr.Wdata_wiki().Data_mgr().Redirect(page, qid_bry);
if (qid_page.Missing()) {
usr_dlg.Warn_many(
"", "", "qid cannot be found in wikidata; qid:~{0}", String_.new_u8(qid_bry));
return false;
}
return true;
}
private static Bry_fmtr html_fmtr =
Bry_fmtr.new_(
String_.Concat_lines_nl(
"<div id=\"mw-content-text\">",
"<form method=\"get\" action=\"//www.wikidata.org/wiki/Special:ItemByTitle\" name=\"itembytitle\" id=\"wb-itembytitle-form1\">",
"<fieldset>",
"<legend>~{legend}</legend>",
"<label for=\"wb-itembytitle-sitename\">~{site_lbl}:</label>",
"<input id=\"wb-itembytitle-sitename\" size=\"12\" name=\"site\" value=\"~{site_val}\" accesskey=\"s\" />",
"",
"<label for=\"pagename\">~{page_lbl}:</label>",
"<input id=\"pagename\" size=\"36\" class=\"wb-input-text\" name=\"page\" value=\"~{page_val}\" accesskey=\"p\" />",
"",
"<input id=\"wb-itembytitle-submit\" class=\"wb-input-button\" type=\"submit\" value=\"~{search_lbl}\" name=\"submit\" />",
"</fieldset>",
"</form>",
"</div>",
"<br>To change the default site, see <a href='/site/home/wiki/Help:Options/Wikibase'>Help:Options/Wikibase</a>"),
"legend",
"site_lbl",
"site_val",
"page_lbl",
"page_val",
"search_lbl");
}