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/*
* Copyright (C) 2020 Yomichan Authors
*
* 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.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <https://www.gnu.org/licenses/>.
*/
/* globals
* DOMDataBinder
*/
class GenericSettingController {
constructor(settingsController) {
this._settingsController = settingsController;
this._defaultScope = 'profile';
this._dataBinder = new DOMDataBinder({
selector: '[data-setting]',
createElementMetadata: this._createElementMetadata.bind(this),
compareElementMetadata: this._compareElementMetadata.bind(this),
getValues: this._getValues.bind(this),
setValues: this._setValues.bind(this)
});
this._transforms = new Map([
['setAttribute', this._setAttribute.bind(this)],
['setVisibility', this._setVisibility.bind(this)],
['splitTags', this._splitTags.bind(this)],
['joinTags', this._joinTags.bind(this)],
['toNumber', this._toNumber.bind(this)],
['toString', this._toString.bind(this)]
]);
}
async prepare() {
this._dataBinder.observe(document.body);
this._settingsController.on('optionsChanged', this._onOptionsChanged.bind(this));
}
async refresh() {
await this._dataBinder.refresh();
}
// Private
_onOptionsChanged() {
this._dataBinder.refresh();
}
_createElementMetadata(element) {
const {dataset: {setting: path, scope, transform: transformRaw}} = element;
let transforms;
if (typeof transformRaw === 'string') {
transforms = JSON.parse(transformRaw);
if (!Array.isArray(transforms)) { transforms = [transforms]; }
} else {
transforms = [];
}
return {
path,
scope,
transforms,
transformRaw
};
}
_compareElementMetadata(metadata1, metadata2) {
return (
metadata1.path === metadata2.path &&
metadata1.scope === metadata2.scope &&
metadata1.transformRaw === metadata2.transformRaw
);
}
async _getValues(targets) {
const defaultScope = this._defaultScope;
const settingsTargets = [];
for (const {metadata: {path, scope}} of targets) {
const target = {
path,
scope: scope || defaultScope
};
settingsTargets.push(target);
}
return this._transformResults(await this._settingsController.getSettings(settingsTargets), targets);
}
async _setValues(targets) {
const defaultScope = this._defaultScope;
const settingsTargets = [];
for (const {metadata: {path, scope, transforms}, value, element} of targets) {
const transformedValue = this._applyTransforms(value, transforms, 'pre', element);
const target = {
path,
scope: scope || defaultScope,
action: 'set',
value: transformedValue
};
settingsTargets.push(target);
}
return this._transformResults(await this._settingsController.modifySettings(settingsTargets), targets);
}
_transformResults(values, targets) {
return values.map((value, i) => {
const error = value.error;
if (error) { return jsonToError(error); }
const {metadata: {transforms}, element} = targets[i];
const result = this._applyTransforms(value.result, transforms, 'post', element);
return {result};
});
}
_applyTransforms(value, transforms, step, element) {
for (const transform of transforms) {
const transformStep = transform.step;
if (typeof transformStep !== 'undefined' && transformStep !== step) { continue; }
const transformFunction = this._transforms.get(transform.type);
if (typeof transformFunction === 'undefined') { continue; }
value = transformFunction(value, transform, element);
}
return value;
}
_getAncestor(node, ancestorDistance) {
if (ancestorDistance < 0) {
return document.documentElement;
}
for (let i = 0; i < ancestorDistance && node !== null; ++i) {
node = node.parentNode;
}
return node;
}
_getRelativeElement(node, ancestorDistance, selector) {
const selectorRoot = (
typeof ancestorDistance === 'number' ?
this._getAncestor(node, ancestorDistance) :
document
);
if (selectorRoot === null) { return null; }
return (
typeof selector === 'string' ?
selectorRoot.querySelector(selector) :
(selectorRoot === document ? document.documentElement : selectorRoot)
);
}
_evaluateSimpleOperation(operation, lhs, rhs) {
switch (operation) {
case '!': return !lhs;
case '!!': return !!lhs;
case '===': return lhs === rhs;
case '!==': return lhs !== rhs;
case '>=': return lhs >= rhs;
case '<=': return lhs <= rhs;
case '>': return lhs > rhs;
case '<': return lhs < rhs;
default: return false;
}
}
// Transforms
_setAttribute(value, data, element) {
const {ancestorDistance, selector, attribute} = data;
const relativeElement = this._getRelativeElement(element, ancestorDistance, selector);
if (relativeElement !== null) {
relativeElement.setAttribute(attribute, `${value}`);
}
return value;
}
_setVisibility(value, data, element) {
const {ancestorDistance, selector, condition} = data;
const relativeElement = this._getRelativeElement(element, ancestorDistance, selector);
if (relativeElement !== null) {
relativeElement.hidden = !this._evaluateSimpleOperation(condition.op, value, condition.value);
}
return value;
}
_splitTags(value) {
return `${value}`.split(/[,; ]+/).filter((v) => !!v);
}
_joinTags(value) {
return value.join(' ');
}
_toNumber(value, data) {
let {constraints} = data;
if (!isObject(constraints)) { constraints = {}; }
return DOMDataBinder.convertToNumber(value, constraints);
}
_toString(value) {
return `${value}`;
}
}
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