# All files / gogocode-core/src Ast.js

96.3% Statements 442/459
90.71% Branches 293/323
100% Functions 64/64
96.49% Lines 440/456

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    36xconst generate = require('./js-core/generate');
    const htmlGenerate = require('./html-core/serialize-node');
    const vueGenerate = require('./vue-core/generate');
    const core = require('./js-core/core');
    const htmlCore = require('./html-core/core')
    const vueCore = require('./vue-core/core')
    const NodePath = require('./NodePath');
    const filterProp = require('./js-core/filter-prop')
    const { isObject } = require('./util')

    const languageMap = {
        'js': {
            generate,
            core
        },
        'html': {
            generate: htmlGenerate,
            core: htmlCore
        },
        'vue': {
            generate: vueGenerate,
            core: vueCore
        }
    }

    class AST {
        constructor(nodePath, { parseOptions, match, rootNode } = {}) {
            if (nodePath) {
                this[0] = {
                    nodePath, match
                }
            }
            this.rootNode = rootNode;
            this.expando = 'g' + ('' + Math.random()).replace( /\D/g, "" ) + 'g';
            this.parseOptions = parseOptions;
        }
        get node() {
            return this[0].nodePath.node
        }
        get value() {
            return this[0].nodePath.value
        }
        get match() {
            return this[0].match
        }
        get isHtml() {
            return this.parseOptions && (this.parseOptions.html || this.parseOptions.language == 'html');
        }
        get language() {
            return (this.parseOptions && this.parseOptions.language) || 'js';
        }
        get core() {
            return languageMap[this.language].core
        }
        get _index() {
            initParent(this);
            // todo js
            return this[0]._index;
        }
        get length() {
            let i = 0;
            while(this[i]) {
                i++
            }
            return i;
        }
        each(callback) {
            let i = 0;
            const newAST = cloneAST(this)
            while (this[i]) {
                const { nodePath, match } = this[i]
                const eachNode = new AST(nodePath, { parseOptions: this.parseOptions, match, rootNode: this.rootNode})
                callback(eachNode, i);
                newAST[i] = eachNode[0] || null
                i++;
            }
            return newAST
        }
        find(selector, options = {}) {
            if (!selector) {
                throw new Error('find failed! first argument should not be null!')
            }
            Iif (!this[0]) {
                return this;
            }
            const { nodePath } = this[0];
            // if (typeof selector !== 'string' && !Array.isArray(selector)) {
            //     throw new Error('find failed! Nodepath is null!');
            // }
            const pOptions = options.parseOptions || this.parseOptions;
            const {nodePathList, matchWildCardList, extra = {} } = this.core.getAstsBySelector(
                nodePath.node,
                selector, {
                    strictSequence: options.ignoreSequence === false,
                    parseOptions: pOptions,
                    expando: this.expando,
                    deep: options.deep
                }
            );
            const newAST = cloneAST(this)
            if (!newAST.rootNode) {
                newAST.rootNode = this[0].nodePath;
            }
            nodePathList.forEach((nodePath, i) => {
                // 把this里的parentPath接到nodePath上
                if (this.language == 'js') {
                    let theNodePath = nodePath;
                    while(theNodePath.parentPath) {
                        if (theNodePath.parentPath && theNodePath.parentPath.name == 'root') {
                            if (theNodePath.parentPath.node.type != 'File') {
                                theNodePath.parentPath = this[0].nodePath;
                            }
                            break;
                        }
                        theNodePath = theNodePath.parentPath;
                    }
                }
                newAST[i] = { nodePath, parseOptions: extra.parseOptions || pOptions, match: matchWildCardList[i] };
            })
            if (extra.parseOptions) {
                newAST.parseOptions = extra.parseOptions
            }
            return newAST;
        }
        parent(level = 0) {
            if (!this[0]) {
                return this;
            }
            // if (!this[0].parentList) {
            initParent(this)
            // }
            const parent = this[0].parentList[level]
            const newAST = cloneAST(this)
            if (parent) {
                newAST[0] = { nodePath: parent, parseOptions: this.parseOptions };
                return newAST;
            } else {
                return this;
            }
        }
        parents() {
            if (!this[0]) {
                return this;
            }
            // if (!this[0].parentList) {
            initParent(this)
            // }
            const { parentList } = this[0];
            const newAST = cloneAST(this)
            parentList.forEach((nodePath, i) => {
                newAST[i] = { nodePath, parseOptions: this.parseOptions, match: null };
            })
            return newAST;
        }
        root(option) {
            if (!this.rootNode) {
                return this;
            }
            const newAST = cloneAST(this)
            newAST[0] = { nodePath: this.rootNode }
            newAST.rootNode = null;
            if (this.parseOptions && this.parseOptions.rootLanguage == 'vue') {
                Iif (option == 'template') {
                    newAST[0] = { nodePath: this.rootNode.node.templateAst }
                } else Iif (option == 'script') {
                    newAST[0] = { nodePath: this.rootNode.node.scriptAst }
                } else {
                    newAST.parseOptions = { language: 'vue' };
                }
            }
            return newAST;
        }
        has(selector, options) {
            return !!this.find(selector, options)[0]
        }
        siblings() {
            if (!this[0]) {
                return this;
            }
            // if (!Array.isArray(this[0].siblings)) {
            initSiblings(this);
            // }
            const siblings = this[0].siblings || [];
            const newAST = cloneAST(this)
            siblings.forEach((sibling, i) => {
                newAST[i] = sibling
            });
            return newAST;
        }
        prevAll() {
            if (!this[0]) {
                return this;
            }
            // if (!Array.isArray(this[0].siblings)) {
            initSiblings(this);
            // }
            const prevAll = this[0].prevAll || [];
            const newAST = cloneAST(this)
            prevAll.forEach((prev, i) => {
                newAST[i] = prev
            });
            return newAST;
        }
        prev() {
            if (!this[0]) {
                return this;
            }
            // if (!Array.isArray(this[0].siblings)) {
            initSiblings(this);
            // }
            const prevAll = this[0].prevAll || [];
            const newAST = cloneAST(this)
            newAST[0] = prevAll[prevAll.length - 1];
            return newAST;
        }

        nextAll() {
            if (!this[0]) {
                return this;
            }
            // if (!Array.isArray(this[0].siblings)) {
            initSiblings(this);
            // }
            const nextAll = this[0].nextAll || [];
            const newAST = cloneAST(this)
            nextAll.forEach((next, i) => {
                newAST[i] = next
            });
            return newAST;
        }
        next() {
            if (!this[0]) {
                return this;
            }
            // if (!Array.isArray(this[0].siblings)) {
            initSiblings(this);
            // }
            const nextAll = this[0].nextAll || [];
            const newAST = cloneAST(this)
            newAST[0] = nextAll[0];
            return newAST;
        }
        eq(index) {
            index = index || 0;
            const { nodePath, match } = this[index] || {}
            const newAST = cloneAST(this)
            newAST[0] = { nodePath, parseOptions: this.parseOptions, match }
            return newAST;
        }
        attr(arg1, arg2) {
            if (!this[0] || !this[0].nodePath || !this[0].nodePath.node) {
                return this;
            }
            let attrMap = {};
            if (arg2) {
                // arg1是key arg2是value
                if (typeof arg1 == 'string') {
                    attrMap = { [arg1]: arg2 }
                } else {
                    throw new Error('attr failed! args[0] should be string!')
                }
            } else {
                if (typeof arg1 == 'string') {
                    // 取某个属性
                    return getAttrValue(this[0].nodePath.node, arg1);
                } else Eif (typeof arg1 == 'object') {
                    attrMap = arg1;
                }
            }
            setAttrValue(this[0].nodePath.node, attrMap);
            return this;
        }
        child(attrName) {
            Iif (!this[0] || !this[0].nodePath || !this[0].nodePath.node) {
                return this;
            }
            const keyList = attrName.split('.');
            let currentNode = this.node;
            let nodePath = this[0].nodePath;
            let parentPath = this[0].nodePath.parentPath;
            let newNodeAST;
            let deep = 0;
            if (this.node.program) {
                nodePath = nodePath.get('program', 'body', '0')
                currentNode = currentNode.program.body[0];
            }
            keyList.forEach(attr => {
                const node = currentNode[attr];
                Eif (node) {
                    Eif (this.language == 'js') {
                        newNodeAST = cloneAST(this);
                        nodePath = nodePath.get(attr)
                        newNodeAST[0] = { nodePath, parseOptions: this.parseOptions }
                    } else {
                        newNodeAST = cloneAST(this);
                        parentPath = nodePath
                        nodePath = new NodePath(currentNode[attr], nodePath, nodePath)
                        newNodeAST[0] = { nodePath, parseOptions: this.parseOptions }
                    }
                    currentNode = node
                    deep++
                }
            })
            Eif (deep == keyList.length) {
                return newNodeAST;
            } else {
                return null
            }
        }
        clone() {
            if (!this[0]) {
                return this;
            }
            let nodePath;
            // html深度克隆时需要忽略parentRef
            if (this.isHtml) {
                const parentRefList = []
                markParent(this[0].nodePath.node)
                const newNode = JSON.parse(JSON.stringify(this[0].nodePath.node));
                resetParent(newNode);
                resetParent(this[0].nodePath.node);
                nodePath = new NodePath(
                    newNode,
                    this[0].nodePath.parent,
                    this[0].nodePath.parentPath
                )
                function resetParent(node) {
                    for (let key in node) {
                        if (key == 'parentRef') {
                            node[key] = parentRefList[node[key]]
                        } else if (isObject(node[key])) {
                            if (Array.isArray(node[key])) {
                                node[key].forEach(n => {
                                    resetParent(n)
                                });
                            } else {
                                resetParent(node[key]);
                            }
                        }
                    }
                }
                function markParent(node) {
                    for (let key in node) {
                        if (key == 'parentRef') {
                            parentRefList.push(node[key]);
                            node[key] = parentRefList.length - 1;
                        } else if (isObject(node[key])) {
                            if (Array.isArray(node[key])) {
                                node[key].forEach(n => {
                                    markParent(n)
                                });
                            } else {
                                markParent(node[key]);
                            }
                        }
                    }
                }

            } else {
                const node = {};
                // js需要做一层属性过滤，否则会有环形依赖
                filterProp(this[0].nodePath.node, node, [
                    'computed',
                    'range',
                    'loc',
                    'start',
                    'end',
                    'leadingComments',
                    'shorthand',
                    'extra',
                    'static',
                    'typeParameters'
                ]);
                nodePath = new NodePath(
                    // JSON.parse(JSON.stringify(this[0].nodePath.node)),
                    JSON.parse(JSON.stringify(node)),
                    this[0].nodePath.parent,
                    this[0].nodePath.parentPath
                )
            }
            const { match } = this[0]
            const newAST = cloneAST(this)
            newAST[0] = { nodePath, parseOptions: this.parseOptions, match }
            return newAST;
        }
        replace(selector, replacer, { ignoreSequence, parseOptions } = {}) {
            if (!this[0]) {
                // throw new Error('replace failed! Nodepath is null!');
                return this;
            }
            this.core.replaceSelBySel(this[0].nodePath, selector, replacer, ignoreSequence === false, parseOptions, this.expando)
            return this;
        }
        replaceBy(replacer) {
            if (!this[0]) {
                return this.root();
            }
            if (replacer[0] && replacer[0].nodePath) {
                replacer = replacer[0].nodePath.node
            }
            if (typeof replacer == 'string') {
                replacer = this.core.buildAstByAstStr(replacer);
            }
            if (replacer.type == 'File') {
                replacer = replacer.program.body[0]
            }
            let i = 0;
            while(this[i]) {
                this.core.replaceAstByAst(this[i].nodePath, replacer, this._index)
                i++
            }

            return this;
        }
        insertSiblingNode(node, type) {
            if (!this[0]) {
                return this;
            }
            if (!node.type && !node.nodeType) {
                throw new Error('insert failed! Unexpected node for insert!')
            }

            if (node.type && node.type.match('Comment')) {
                // 处理注释
                let targetNode = this;
                // if (this.node.type == 'File') {
                //     targetNode = $(this.node.program.body)
                // }
                node.trailing = type == 'after';
                node.leading = type == 'before';
                this.insertChildNode(
                    'comments',
                    node,
                    type == 'after' ? 'append' : 'prepend')
                return;
            }
            // if (!this[0].parentList) {
            initParent(this)
            // }
            if (this.isHtml) {
                let p;
                let index = -1
                if (this.node.nodeType == 'document') {
                    p = this.node.content.children;
                    index = type == 'before' ? 0 : p.length - 1
                } else {
                    const parent = this.parent();
                    // todotodo
                    p = parent.attr('content.children') || [];
                    p.forEach((item, i) => {
                        if (item == this.node) {
                            index = i
                        }
                    })
                }
                if (type == 'before') {
                    p.splice(index, 0, node)
                } else {
                    p.splice(index + 1, 0, node)
                }
            } else {
                const parentList = this[0].parentList;
                if ((!parentList || parentList.length == 0) && this.node.type == 'File') {
                    if (type == 'before') {
                        this.attr('program.body').unshift(node)
                    } else {
                        this.attr('program.body').push(node)
                    }
                    return;
                }
                let getArrayParent = false;
                let i = 0;
                let selfPathNode = this[0].nodePath.value;
                let selfIndex = -1;
                while(!getArrayParent) {
                    Iif (!parentList[i] || !parentList[i].value) {
                        getArrayParent = true;
                    } else if (Array.isArray(parentList[i].value)) {
                        getArrayParent = true;
                        parentList[i].value.forEach((nodePath, index) => {
                            Eif (nodePath == selfPathNode) {
                                selfIndex = index;
                            }
                        })
                        Eif (type == 'after') {
                            parentList[i].value.splice(selfIndex + 1, 0, node)
                        } else {
                            parentList[i].value.splice(selfIndex, 0, node)
                        }
                    }
                    selfPathNode = parentList[i].value;
                    i++
                }
            }
        }
        after(node) {
            if (!node) {
                throw new Error('after failed! Unexpected node for insert!')
            }
            if (typeof node == 'string') {
                node = this.core.buildAstByAstStr(node)
            }
            if (node[0] && node[0].nodePath) {
                node = node[0].nodePath.value
            }
            if (node.type == 'File') {
                Eif (node.program.body.length > 0) {
                    node.program.body.forEach(item => {
                        this.insertSiblingNode(item, 'after');
                    })
                    return this;
                } else {
                    return this;
                }
            }
            Eif (!Array.isArray(node)) {
                node = [node]
            }
            node.forEach(n => {
                this.insertSiblingNode(n, 'after');
            })
            return this;
        }
        before(node) {
            if (!node) {
                throw new Error('before failed! Unexpected node for insert!')
            }
            if (typeof node == 'string') {
                node = this.core.buildAstByAstStr(node)
            }
            if (node[0] && node[0].type == 'Decorator') {
                this.node.decorators = (this.node.decorators || []).concat(node);
                return this;
            }
            if (node[0] && node[0].nodePath) {
                node = node[0].nodePath.value
            }
            if (node.type == 'File') {
                Eif (node.program.body.length > 0) {
                    node.program.body.reverse().forEach(item => {
                        this.insertSiblingNode(item, 'before');
                    })
                    return this;
                } else {
                    return this;
                }
            }
            if (!Array.isArray(node)) {
                node = [node]
            }
            node.reverse().forEach(n => {
                this.insertSiblingNode(n, 'before');
            })
            return this;
        }
        insertChildNode(attr, node, type) {
            if (!this[0] || !this[0].nodePath) {
                return;
            }
            let selfNode = this[0].nodePath.value;
            let bodyIndex = selfNode.program && type == 'append' ? selfNode.program.body.length - 1 : 0
            Eif (!Array.isArray(selfNode)) {
                // for(let key in selfNode) {
                //     if (Array.isArray(selfNode[key])) {
                //         selfNode = selfNode[key]
                //     }
                // }
                if (attr == 'content.children') {
                    selfNode.content.children = selfNode.content.children || [];
                    selfNode = selfNode.content.children;
                } else if (selfNode.program && selfNode.program.body) {
                    if (attr == 'program.body') {
                        selfNode = selfNode.program.body;
                    } else {
                        selfNode.program.body[bodyIndex][attr] = selfNode.program.body[bodyIndex][attr] || []
                        selfNode = selfNode.program.body[bodyIndex][attr]
                    }
                } else {
                    selfNode[attr] = selfNode[attr] || [];
                    selfNode = selfNode[attr];
                    if (!Array.isArray(selfNode)) {
                        selfNode = selfNode.body
                    }
                }

            }

            if (node.type == 'File' && node.program.body) {
                node = node.program.body[bodyIndex]
                Iif (!node) return;
            }
            Eif (selfNode) {
                if (type == 'append') {
                    selfNode.push(node);
                } else {
                    selfNode.unshift(node);
                }
            }
        }
        append(attr, node) {
            if (!attr) {
                return this;
            }
            if (this.isHtml) {
                node = attr;
                attr = 'content.children';
            }
            if (!node) {
                node = attr;
                attr = 'program.body'
            }
            if (typeof node == 'string') {
                node = this.core.buildAstByAstStr(node)
            }
            if (node[0] && node[0].nodePath) {
                node = node[0].nodePath.value
            }
            if (!Array.isArray(node)) {
                node = [node]
            }
            node.forEach(n => {
                this.insertChildNode(attr, n, 'append');
            })
            return this;

        }
        prepend(attr, node) {
            if (this.isHtml) {
                node = attr;
                attr = 'content.children';
            }
            if (!node) {
                node = attr;
                attr = 'program.body'
            }
            if (typeof node == 'string') {
                node = this.core.buildAstByAstStr(node)
            }
            if (node[0] && node[0].nodePath) {
                node = node[0].nodePath.value
            }
            Eif (!Array.isArray(node)) {
                node = [node]
            }
            node.reverse().forEach(n => {
                this.insertChildNode(attr, n, 'prepend');
            })
            return this;
        }
        empty() {
            this.each(item => {
                if (item.language == 'html') {
                    Eif (Array.isArray(item.attr('content.children'))) {
                        item.attr('content.children', []);
                    }
                } else Eif (item.language == 'js') {
                    Iif (Array.isArray(item[0].nodePath.value)) {
                        item[0].nodePath.value = [];
                    } else if (item.node.type == 'File') {
                        item.attr('program.body', [])
                    }
                }
            })
            return this
        }
        remove(selector, options = {}) {
            if (!this[0]) {
                return this.root()
            }
            if (typeof selector == 'string' || Array.isArray(selector)) {
                const pOptions = options.parseOptions || this.parseOptions;
                let i = 0;
                while(this[i]) {
                    this.core.removeAst(this.node, selector, {
                        strictSequence: options.ignoreSequence === false,
                        parseOptions: pOptions,
                        expando: this.expando
                    });
                    i++
                }
            } else {
                let i = 0;
                while(this[i]) {
                    this.core.remove(this[i].nodePath)
                    i++
                }

            }
            return this.root()
        }
        generate({ isPretty = false } = {}) {
            if (!this[0]) {
                return '';
            }
            if (this.language == 'js') {
                return generate(this[0].nodePath.node, isPretty)
            } else {
                return (languageMap[this.language].generate)(this[0].nodePath.value);
            }
        }
    }

    function cloneAST(ast) {
        const newAST = new AST('', { parseOptions: ast.parseOptions, rootNode: ast.rootNode})
        Iif (ast.sfc) {
            newAST.sfc = ast.sfc
        }
        return newAST
    }

    function getAttrValue(node, attr) {
        const keyList = attr.split('.');
        let currentNode = node;
        let deep = 0;
        keyList.forEach(attr => {
            if (currentNode[attr]) {
                currentNode = currentNode[attr];
                deep++
            }
        })
        if (deep == keyList.length) {
            return currentNode;
        } else {
            return null
        }
    }

    function initParent(ast) {
        if (ast.isHtml) {
            ast[0].parentList =  ast.core.getParentListByAst(ast[0].nodePath)
            ast[0]._index = ast[0].parentList[0] ? ast[0].parentList[0].node.content.children.indexOf(ast[0].nodePath.node) : 0;
        } else {
            ast[0].parentList =  core.getParentListByAst(ast[0].nodePath)
        }
        return ast[0].parentList
    }

    function initSiblings(ast) {
        if (ast.language == 'html') {
            const parent = ast.parent();
            const siblings = (parent.attr('content.children') || []).map((node, index) => {
                return {
                    _index: index,
                    nodePath: new NodePath(node, parent[0].nodePath, parent[0].nodePath),
                    parseOptions: ast.parseOptions
                }
            });

            ast[0].siblings = siblings;
            ast[0].prevAll = siblings.filter(s => s._index < ast._index);
            ast[0].nextAll = siblings.filter(s => s._index > ast._index);
        } else {
            const parentList = initParent(ast);
            if (!parentList || parentList.length == 0) {
                return;
            }
            const parseOptions = ast.parseOptions;
            let getArrayParent = false;
            let i = 0;
            const siblings = [];
            const prevAll = [];
            const nextAll = [];
            let selfPathNode = ast[0].nodePath.value;
            while(!getArrayParent) {
                Iif (!parentList[i] || !parentList[i].value) {
                    getArrayParent = true;
                } else if (Array.isArray(parentList[i].value)) {
                    getArrayParent = true;
                    let isPrev = true;
                    let childIndex = 0
                    while (parentList[i].__childCache[childIndex]) {
                        const nodePath = parentList[i].__childCache[childIndex]
                        if (nodePath.value == selfPathNode) {
                            // find self
                            isPrev = false;
                        } else {
                            siblings.push({ nodePath, parseOptions })
                            if (isPrev) {
                                prevAll.push({ nodePath, parseOptions })
                            } else {
                                nextAll.push({ nodePath, parseOptions })
                            }
                        }
                        childIndex++
                    }
                    ast[0].siblings = siblings;
                    ast[0].prevAll = prevAll;
                    ast[0].nextAll = nextAll;
                }
                selfPathNode = parentList[i].value;
                i++
            }
        }
    }
    function setAttrValue(node, attrMap) {
        for(const key in attrMap) {
            const value = attrMap[key];
            const keyList = key.split('.');
            let currentNode = node;
            keyList.forEach((attr, index) => {
                if (index == keyList.length - 1) {
                    currentNode[attr] = value;
                } else Eif (currentNode[attr]) {
                    currentNode = currentNode[attr]
                }
            })
        }

    }
    module.exports = AST;