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"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.getElementsByTagType = exports.getElementsByTagName = exports.getElementById = exports.getElements = exports.testElement = void 0;
var domhandler_1 = require("domhandler");
var querying_1 = require("./querying");
var Checks = {
tag_name: function (name) {
if (typeof name === "function") {
return function (elem) { return (0, domhandler_1.isTag)(elem) && name(elem.name); };
}
else if (name === "*") {
return domhandler_1.isTag;
}
return function (elem) { return (0, domhandler_1.isTag)(elem) && elem.name === name; };
},
tag_type: function (type) {
if (typeof type === "function") {
return function (elem) { return type(elem.type); };
}
return function (elem) { return elem.type === type; };
},
tag_contains: function (data) {
if (typeof data === "function") {
return function (elem) { return (0, domhandler_1.isText)(elem) && data(elem.data); };
}
return function (elem) { return (0, domhandler_1.isText)(elem) && elem.data === data; };
},
};
/**
* @param attrib Attribute to check.
* @param value Attribute value to look for.
* @returns A function to check whether the a node has an attribute with a particular value.
*/
function getAttribCheck(attrib, value) {
if (typeof value === "function") {
return function (elem) { return (0, domhandler_1.isTag)(elem) && value(elem.attribs[attrib]); };
}
return function (elem) { return (0, domhandler_1.isTag)(elem) && elem.attribs[attrib] === value; };
}
/**
* @param a First function to combine.
* @param b Second function to combine.
* @returns A function taking a node and returning `true` if either
* of the input functions returns `true` for the node.
*/
function combineFuncs(a, b) {
return function (elem) { return a(elem) || b(elem); };
}
/**
* @param options An object describing nodes to look for.
* @returns A function executing all checks in `options` and returning `true`
* if any of them match a node.
*/
function compileTest(options) {
var funcs = Object.keys(options).map(function (key) {
var value = options[key];
return Object.prototype.hasOwnProperty.call(Checks, key)
? Checks[key](value)
: getAttribCheck(key, value);
});
return funcs.length === 0 ? null : funcs.reduce(combineFuncs);
}
/**
* @param options An object describing nodes to look for.
* @param node The element to test.
* @returns Whether the element matches the description in `options`.
*/
function testElement(options, node) {
var test = compileTest(options);
return test ? test(node) : true;
}
exports.testElement = testElement;
/**
* @param options An object describing nodes to look for.
* @param nodes Nodes to search through.
* @param recurse Also consider child nodes.
* @param limit Maximum number of nodes to return.
* @returns All nodes that match `options`.
*/
function getElements(options, nodes, recurse, limit) {
if (limit === void 0) { limit = Infinity; }
var test = compileTest(options);
return test ? (0, querying_1.filter)(test, nodes, recurse, limit) : [];
}
exports.getElements = getElements;
/**
* @param id The unique ID attribute value to look for.
* @param nodes Nodes to search through.
* @param recurse Also consider child nodes.
* @returns The node with the supplied ID.
*/
function getElementById(id, nodes, recurse) {
if (recurse === void 0) { recurse = true; }
if (!Array.isArray(nodes))
nodes = [nodes];
return (0, querying_1.findOne)(getAttribCheck("id", id), nodes, recurse);
}
exports.getElementById = getElementById;
/**
* @param tagName Tag name to search for.
* @param nodes Nodes to search through.
* @param recurse Also consider child nodes.
* @param limit Maximum number of nodes to return.
* @returns All nodes with the supplied `tagName`.
*/
function getElementsByTagName(tagName, nodes, recurse, limit) {
if (recurse === void 0) { recurse = true; }
if (limit === void 0) { limit = Infinity; }
return (0, querying_1.filter)(Checks.tag_name(tagName), nodes, recurse, limit);
}
exports.getElementsByTagName = getElementsByTagName;
/**
* @param type Element type to look for.
* @param nodes Nodes to search through.
* @param recurse Also consider child nodes.
* @param limit Maximum number of nodes to return.
* @returns All nodes with the supplied `type`.
*/
function getElementsByTagType(type, nodes, recurse, limit) {
if (recurse === void 0) { recurse = true; }
if (limit === void 0) { limit = Infinity; }
return (0, querying_1.filter)(Checks.tag_type(type), nodes, recurse, limit);
}
exports.getElementsByTagType = getElementsByTagType;