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/*
* Copyright (C) 2020-2022 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/>.
*/
/* global
* JsonSchema
*/
/**
* Utility class to help processing profile conditions.
*/
class ProfileConditionsUtil {
/**
* A group of conditions.
* @typedef {object} ProfileConditionGroup
* @property {ProfileCondition[]} conditions The list of conditions for this group.
*/
/**
* A single condition.
* @typedef {object} ProfileCondition
* @property {string} type The type of the condition.
* @property {string} operator The condition operator.
* @property {string} value The value to compare against.
*/
/**
* Creates a new instance.
*/
constructor() {
this._splitPattern = /[,;\s]+/;
this._descriptors = new Map([
[
'popupLevel',
{
operators: new Map([
['equal', this._createSchemaPopupLevelEqual.bind(this)],
['notEqual', this._createSchemaPopupLevelNotEqual.bind(this)],
['lessThan', this._createSchemaPopupLevelLessThan.bind(this)],
['greaterThan', this._createSchemaPopupLevelGreaterThan.bind(this)],
['lessThanOrEqual', this._createSchemaPopupLevelLessThanOrEqual.bind(this)],
['greaterThanOrEqual', this._createSchemaPopupLevelGreaterThanOrEqual.bind(this)]
])
}
],
[
'url',
{
operators: new Map([
['matchDomain', this._createSchemaUrlMatchDomain.bind(this)],
['matchRegExp', this._createSchemaUrlMatchRegExp.bind(this)]
])
}
],
[
'modifierKeys',
{
operators: new Map([
['are', this._createSchemaModifierKeysAre.bind(this)],
['areNot', this._createSchemaModifierKeysAreNot.bind(this)],
['include', this._createSchemaModifierKeysInclude.bind(this)],
['notInclude', this._createSchemaModifierKeysNotInclude.bind(this)]
])
}
],
[
'flags',
{
operators: new Map([
['are', this._createSchemaFlagsAre.bind(this)],
['areNot', this._createSchemaFlagsAreNot.bind(this)],
['include', this._createSchemaFlagsInclude.bind(this)],
['notInclude', this._createSchemaFlagsNotInclude.bind(this)]
])
}
]
]);
}
/**
* Creates a new JSON schema descriptor for the given set of condition groups.
* @param {ProfileConditionGroup[]} conditionGroups An array of condition groups.
* For a profile match, all of the items must return successfully in at least one of the groups.
* @returns {JsonSchema} A new `JsonSchema` object.
*/
createSchema(conditionGroups) {
const anyOf = [];
for (const {conditions} of conditionGroups) {
const allOf = [];
for (const {type, operator, value} of conditions) {
const conditionDescriptor = this._descriptors.get(type);
if (typeof conditionDescriptor === 'undefined') { continue; }
const createSchema = conditionDescriptor.operators.get(operator);
if (typeof createSchema === 'undefined') { continue; }
const schema = createSchema(value);
allOf.push(schema);
}
switch (allOf.length) {
case 0: break;
case 1: anyOf.push(allOf[0]); break;
default: anyOf.push({allOf}); break;
}
}
let schema;
switch (anyOf.length) {
case 0: schema = {}; break;
case 1: schema = anyOf[0]; break;
default: schema = {anyOf}; break;
}
return new JsonSchema(schema);
}
/**
* Creates a normalized version of the context object to test,
* assigning dependent fields as needed.
* @param {object} context A context object which is used during schema validation.
* @returns {object} A normalized context object.
*/
normalizeContext(context) {
const normalizedContext = Object.assign({}, context);
const {url} = normalizedContext;
if (typeof url === 'string') {
try {
normalizedContext.domain = new URL(url).hostname;
} catch (e) {
// NOP
}
}
const {flags} = normalizedContext;
if (!Array.isArray(flags)) {
normalizedContext.flags = [];
}
return normalizedContext;
}
// Private
_split(value) {
return value.split(this._splitPattern);
}
_stringToNumber(value) {
const number = Number.parseFloat(value);
return Number.isFinite(number) ? number : 0;
}
// popupLevel schema creation functions
_createSchemaPopupLevelEqual(value) {
value = this._stringToNumber(value);
return {
required: ['depth'],
properties: {
depth: {const: value}
}
};
}
_createSchemaPopupLevelNotEqual(value) {
return {
not: [this._createSchemaPopupLevelEqual(value)]
};
}
_createSchemaPopupLevelLessThan(value) {
value = this._stringToNumber(value);
return {
required: ['depth'],
properties: {
depth: {type: 'number', exclusiveMaximum: value}
}
};
}
_createSchemaPopupLevelGreaterThan(value) {
value = this._stringToNumber(value);
return {
required: ['depth'],
properties: {
depth: {type: 'number', exclusiveMinimum: value}
}
};
}
_createSchemaPopupLevelLessThanOrEqual(value) {
value = this._stringToNumber(value);
return {
required: ['depth'],
properties: {
depth: {type: 'number', maximum: value}
}
};
}
_createSchemaPopupLevelGreaterThanOrEqual(value) {
value = this._stringToNumber(value);
return {
required: ['depth'],
properties: {
depth: {type: 'number', minimum: value}
}
};
}
// url schema creation functions
_createSchemaUrlMatchDomain(value) {
const oneOf = [];
for (let domain of this._split(value)) {
if (domain.length === 0) { continue; }
domain = domain.toLowerCase();
oneOf.push({const: domain});
}
return {
required: ['domain'],
properties: {
domain: {oneOf}
}
};
}
_createSchemaUrlMatchRegExp(value) {
return {
required: ['url'],
properties: {
url: {type: 'string', pattern: value, patternFlags: 'i'}
}
};
}
// modifierKeys schema creation functions
_createSchemaModifierKeysAre(value) {
return this._createSchemaArrayCheck('modifierKeys', value, true, false);
}
_createSchemaModifierKeysAreNot(value) {
return {
not: [this._createSchemaArrayCheck('modifierKeys', value, true, false)]
};
}
_createSchemaModifierKeysInclude(value) {
return this._createSchemaArrayCheck('modifierKeys', value, false, false);
}
_createSchemaModifierKeysNotInclude(value) {
return this._createSchemaArrayCheck('modifierKeys', value, false, true);
}
// modifierKeys schema creation functions
_createSchemaFlagsAre(value) {
return this._createSchemaArrayCheck('flags', value, true, false);
}
_createSchemaFlagsAreNot(value) {
return {
not: [this._createSchemaArrayCheck('flags', value, true, false)]
};
}
_createSchemaFlagsInclude(value) {
return this._createSchemaArrayCheck('flags', value, false, false);
}
_createSchemaFlagsNotInclude(value) {
return this._createSchemaArrayCheck('flags', value, false, true);
}
// Generic
_createSchemaArrayCheck(key, value, exact, none) {
const containsList = [];
for (const item of this._split(value)) {
if (item.length === 0) { continue; }
containsList.push({
contains: {
const: item
}
});
}
const containsListCount = containsList.length;
const schema = {
type: 'array'
};
if (exact) {
schema.maxItems = containsListCount;
}
if (none) {
if (containsListCount > 0) {
schema.not = containsList;
}
} else {
schema.minItems = containsListCount;
if (containsListCount > 0) {
schema.allOf = containsList;
}
}
return {
required: [key],
properties: {
[key]: schema
}
};
}
}
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