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/**
* Myext querying page settings with regard to wildcard records
*
* Copyright (C) 2021 Wojtek Kosior
* Redistribution terms are gathered in the `copyright' file.
*/
/*
* IMPORTS_START
* IMPORT make_once
* IMPORT get_storage
* IMPORT TYPE_PREFIX
* IMPORTS_END
*/
var storage;
var exports = {};
async function init(fun)
{
storage = await get_storage();
return fun;
}
// TODO: also support urls with specified ports
function query(url, multiple)
{
let proto_re = "[a-zA-Z]*:\/\/";
let domain_re = "[^/?#]+";
let segments_re = "/[^?#]*";
let query_re = "\\?[^#]*";
let url_regex = new RegExp(`\
^\
(${proto_re})\
(${domain_re})\
(${segments_re})?\
(${query_re})?\
#?.*\$\
`);
let regex_match = url_regex.exec(url);
if (regex_match === null) {
console.log("bad url format", url);
return multiple ? [] : [undefined, undefined];
}
let [_, proto, domain, segments, query] = regex_match;
domain = domain.split(".");
let segments_trailing_dash =
segments && segments[segments.length - 1] === "/";
segments = (segments || "").split("/").filter(s => s !== "");
segments.unshift("");
let matched = [];
for (let d_slice = 0; d_slice < domain.length; d_slice++) {
let domain_part = domain.slice(d_slice).join(".");
let domain_wildcards = [];
if (d_slice === 0)
domain_wildcards.push("");
if (d_slice === 1)
domain_wildcards.push("*.");
if (d_slice > 0)
domain_wildcards.push("**.");
domain_wildcards.push("***.");
for (let domain_wildcard of domain_wildcards) {
let domain_pattern = domain_wildcard + domain_part;
for (let s_slice = segments.length; s_slice > 0; s_slice--) {
let segments_part = segments.slice(0, s_slice).join("/");
let segments_wildcards = [];
if (s_slice === segments.length) {
if (segments_trailing_dash)
segments_wildcards.push("/");
segments_wildcards.push("");
}
if (s_slice === segments.length - 1) {
if (segments[s_slice] !== "*")
segments_wildcards.push("/*");
}
if (s_slice < segments.length &&
(segments[s_slice] !== "**" ||
s_slice < segments.length - 1))
segments_wildcards.push("/**");
if (segments[s_slice] !== "***" ||
s_slice < segments.length)
segments_wildcards.push("/***");
for (let segments_wildcard of segments_wildcards) {
let segments_pattern =
segments_part + segments_wildcard;
let pattern = proto + domain_pattern + segments_pattern;
console.log("trying", pattern);
let settings = storage.get(TYPE_PREFIX.PAGE, pattern);
if (settings === undefined)
continue;
if (!multiple)
return [pattern, settings];
matched.push([pattern, settings]);
}
}
}
}
return multiple ? matched : [undefined, undefined];
}
function query_best(url)
{
return query(url, false);
}
function query_all(url)
{
return query(url, true);
}
const get_query_best = make_once(() => init(query_best));
const get_query_all = make_once(() => init(query_all));
/*
* EXPORTS_START
* EXPORT get_query_best
* EXPORT get_query_all
* EXPORTS_END
*/
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