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Add whitelist/blacklist functionality to merge_params.

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This commit is contained in:
voussoir 2020-09-04 15:10:58 -07:00
parent 7d3a9fe03e
commit 0ae041f001
1 changed files with 34 additions and 5 deletions
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39
frontends/ycdl_flask/static/js/common.js
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@ -157,19 +157,48 @@ function init_atag_merge_params()
"merge_params". If the URL and href contain the same parameter, the href
takes priority.
Optional:
data-merge-params: A whitelist of parameter names, separated by commas
or spaces. Only these parameters will be merged from the page URL.
data-merge-params-except: A blacklist of parameter names, separated by
commas or spaces. All parameters except these will be merged from
the page URL.
Example:
URL: ?filter=hello&orderby=score
href: "?orderby=date"
Result: "?filter=hello&orderby=date"
*/
page_params = new URLSearchParams(window.location.search);
function ingest(params, new_params)
{
for (const [key, value] of params) { new_params.set(key, value); }
}
const page_params = Array.from(new URLSearchParams(window.location.search));
let as = Array.from(document.getElementsByClassName("merge_params"));
for (const a of as)
{
let a_params = new URLSearchParams(a.search);
let new_params = new URLSearchParams();
page_params.forEach(function(value, key) {new_params.set(key, value); });
a_params.forEach(function(value, key) {new_params.set(key, value); });
const a_params = new URLSearchParams(a.search);
const new_params = new URLSearchParams();
if (a.dataset.mergeParams)
{
let keep = new Set(a.dataset.mergeParams.split(/[\s,]+/));
ingest(page_params.filter(key_value => keep.has(key_value[0])), new_params);
delete a.dataset.mergeParams;
}
else if (a.dataset.mergeParamsExcept)
{
let remove = new Set(a.dataset.mergeParamsExcept.split(/[\s,]+/));
ingest(page_params.filter(key_value => (! remove.has(key_value[0]))), new_params);
delete a.dataset.mergeParamsExcept;
}
else
{
ingest(page_params, new_params);
}
ingest(a_params, new_params);
a.search = new_params.toString();
a.classList.remove("merge_params");
}