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/**
* This file is part of Haketilo.
*
* Function: Driving the site payload creation form.
*
* Copyright (C) 2022 Wojtek Kosior
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* As additional permission under GNU GPL version 3 section 7, you
* may distribute forms of that code without the copy of the GNU
* GPL normally required by section 4, provided you include this
* license notice and, in case of non-source distribution, a URL
* through which recipients can access the Corresponding Source.
* If you modify file(s) with this exception, you may extend this
* exception to your version of the file(s), but you are not
* obligated to do so. If you do not wish to do so, delete this
* exception statement from your version.
*
* As a special exception to the GPL, any HTML file which merely
* makes function calls to this code, and for that purpose
* includes it by reference shall be deemed a separate work for
* copyright law purposes. If you modify this code, you may extend
* this exception to your version of the code, but you are not
* obligated to do so. If you do not wish to do so, delete this
* exception statement from your version.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <https://www.gnu.org/licenses/>.
*
* I, Wojtek Kosior, thereby promise not to sue for violation of this file's
* license. Although I request that you do not make use of this code in a
* proprietary program, I am not going to enforce this in court.
*/
#IMPORT html/dialog.js
#IMPORT common/indexeddb.js AS haketilodb
#FROM html/DOM_helpers.js IMPORT clone_template
#FROM common/sha256.js IMPORT sha256 AS compute_sha256
#FROM common/patterns.js IMPORT validate_normalize_url_pattern, \
patterns_doc_url
/* https://stackoverflow.com/questions/105034/how-to-create-a-guid-uuid */
/* This is a helper function used by uuidv4(). */
function uuid_replace_num(num)
{
const randbyte = crypto.getRandomValues(new Uint8Array(1))[0];
return (num ^ randbyte & 15 >> num / 4).toString(16);
}
/* Generate a new UUID. */
function uuidv4()
{
return ([1e7]+-1e3+-4e3+-8e3+-1e11).replace(/[018]/g, uuid_replace_num);
}
function collect_form_data(form_ctx)
{
const identifier_nonprepended = form_ctx.identifier.value;
if (!identifier_nonprepended)
throw "The 'identifier' field is required!";
if (!/[-a-zA-Z]+/.test(identifier_nonprepended))
throw "Identifier may only contain digits 0-9, lowercase letters a-z and hyphens '-'!"
const identifier = `local-${identifier_nonprepended}`;
const long_name = form_ctx.long_name.value || identifier_nonprepended;
const description = form_ctx.description.value;
const url_patterns = form_ctx.patterns.value.split("\n").filter(i => i);
if (url_patterns.length === 0)
throw "The 'URL patterns' field is required!";
const payloads = {};
for (let pattern of url_patterns) {
pattern = validate_normalize_url_pattern(pattern);
if (pattern in payloads)
throw `Pattern '${pattern}' specified multiple times!`;
payloads[pattern] = {identifier};
}
const script = form_ctx.script.value;
if (!script)
throw "The 'script' field is required!";
const sha256 = compute_sha256(script);
const resource = {
source_name: identifier,
source_copyright: [],
type: "resource",
identifier,
long_name,
uuid: uuidv4(),
version: [1],
description,
dependencies: [],
scripts: [{file: "payload.js", sha256}]
};
const mapping = {
source_name: identifier,
source_copyright: [],
type: "mapping",
identifier,
long_name,
uuid: uuidv4(),
version: [1],
description,
payloads
};
return {identifier, resource, mapping, files_by_sha256: {[sha256]: script}};
}
function clear_form(form_ctx)
{
form_ctx.identifier.value = "";
form_ctx.long_name.value = "";
form_ctx.description.value = "";
form_ctx.patterns.value = "https://example.com/***";
form_ctx.script.value = `console.log("Hello, World!");`;
}
async function save_payload(saving)
{
const db = await haketilodb.get();
const tx_starter = haketilodb.start_items_transaction;
const files = {sha256: saving.files_by_sha256};
const tx_ctx = await tx_starter(["resource", "mapping"], files);
for (const type of ["resource", "mapping"]) {
if (!saving[`override_${type}`] &&
(await haketilodb.idb_get(tx_ctx.transaction, type,
saving.identifier))) {
saving.ask_override = type;
return;
}
}
await haketilodb.save_item(saving.resource, tx_ctx);
await haketilodb.save_item(saving.mapping, tx_ctx);
return haketilodb.finalize_transaction(tx_ctx);
}
function override_question(saving)
{
return saving.ask_override === "resource" ?
`Resource '${saving.identifier}' already exists. Override?` :
`Mapping '${saving.identifier}' already exists. Override?`;
}
async function create_clicked(form_ctx)
{
if (form_ctx.dialog_ctx.shown)
return;
try {
var saving = collect_form_data(form_ctx);
} catch(e) {
dialog.error(form_ctx.dialog_ctx, e);
return;
}
dialog.loader(form_ctx.dialog_ctx, "Saving payload...");
try {
do {
if (saving.ask_override) {
const override_prom = dialog.ask(form_ctx.dialog_ctx,
override_question(saving));
dialog.loader(form_ctx.dialog_ctx, "Saving payload...");
dialog.close(form_ctx.dialog_ctx);
if (!(await override_prom))
throw "Saving would override existing data.";
saving[`override_${saving.ask_override}`] = true;
delete saving.ask_override;
}
await save_payload(saving);
} while (saving.ask_override);
dialog.info(form_ctx.dialog_ctx, "Successfully saved payload!");
clear_form(form_ctx);
} catch(e) {
console.error(e);
dialog.error(form_ctx.dialog_ctx, "Failed to save payload :(");
}
dialog.close(form_ctx.dialog_ctx);
}
function on_show_hide(form_ctx, what_to_show)
{
for (const item_id of ["form", "dialog"]) {
const action = item_id === what_to_show ? "remove" : "add";
form_ctx[`${item_id}_container`].classList[action]("hide");
}
}
function payload_create_form()
{
const form_ctx = clone_template("payload_create");
form_ctx.dialog_ctx = dialog.make(() => on_show_hide(form_ctx, "dialog"),
() => on_show_hide(form_ctx, "form"));
form_ctx.dialog_container.prepend(form_ctx.dialog_ctx.main_div);
form_ctx.patterns_link.href = patterns_doc_url;
form_ctx.create_but.addEventListener("click",
() => create_clicked(form_ctx));
return form_ctx;
}
#EXPORT payload_create_form
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