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

85.16% Statements 109/128
69.31% Branches 70/101
94.12% Functions 16/17
85.16% Lines 109/128

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     const getSelector = require('./get-selector');
    const { find } = require('./find');
    const parse = require('./parse');
    const generate = require('./serialize-node');
    const core = {
        // 通过选择器获取，返回ast片段
        getAstsBySelector(
            ast,
            selector,
            { strictSequence, deep, parseOptions, expando = 'g123o456g789o' } = {}
        ) {
            //strictSequence作用：
            // 有的时候数组不要求顺序，如{a:$_$}匹配{b:1, a:2}
            // 有的时候需要，如function($_$, $_$)匹配function(a, b) {}

            if (!Array.isArray(selector)) {
                selector = [selector];
            }
            let nodePathList = [];
            let matchWildCardList = [];
            const selectorAst = selector.map((item) => {
                const sel = getSelector(
                    item,
                    this.parseOptions || parseOptions,
                    expando
                );
                Iif (!sel.nodeType) {
                    throw new Error(
                        '语句类型缺失，请在 https://github.com/thx/gogocode/issues 上提供您的代码样例'
                    );
                }
                return sel;
            });
            // const posStrList = [];
            const reachedNodeList = [];
            selectorAst.forEach((item) => {
                const res = find.call(
                    ast,
                    item.nodeType,
                    item.structure,
                    strictSequence,
                    deep,
                    expando
                );
                res.nodePathList.forEach((p, i) => {
                    // let posStr = '';
                    // if (p.node.content.openStart) {
                    //     posStr = `${p.node.content.openStart.startPosition},${p.node.content.openEnd.endPosition}`;
                    // } else if (p.node.content.value) {
                    //     posStr = `${p.node.content.value.startPosition},${p.node.content.value.endPosition}`;
                    // }
                    // if (posStrList.indexOf(posStr) == -1) {
                    //     // 去重
                    //     nodePathList.push(p);
                    //     matchWildCardList.push(res.matchWildCardList[i]);
                    //     posStrList.push(posStr);
                    // }
                    if (reachedNodeList.indexOf(p.node.content) == -1) {
                        nodePathList.push(p);
                        matchWildCardList.push(res.matchWildCardList[i]);
                        reachedNodeList.push(p.node.content)
                    }
                });
            });
            return {
                nodePathList,
                matchWildCardList,
                pathList: nodePathList,
                extraDataList: matchWildCardList
            };
        },
        getParentListByAst(path) {
            const list = [];
            while (path && path.parentPath) {
                list.push(path.parentPath);
                path = path.parentPath;
            }
            return list;
        },

        buildAstByAstStr(
            str,
            astPatialMap = {},
            { isProgram = false, parseOptions } = {}
        ) {
            try {
                const ast = parse(str, parseOptions);
                const program = core.replaceStrByAst(ast, astPatialMap);
                Eif (program) {
                    if (isProgram) {
                        return program;
                    } else {
                        Eif (program.content.children && program.content.children[0]) {
                            if (program.content.children.length > 1) {
                                return program.content.children
                            } else Eif (program.content.children.length == 1) {
                                return program.content.children[0];
                            } else {
                                return null
                            }
                        }
                    }
                } else {
                    return null;
                }
            } catch (e) {
                console.log('buildAstByAstStr failed:' + e);
            }
        },
        replaceStrByAst(ast, astPatialMap = {}) {
            for (let key in astPatialMap) {
                const valueAst = astPatialMap[key];
                const { nodePathList } = core.getAstsBySelector(
                    ast,
                    `'$_$${key}$_$'`
                );
                if (nodePathList.length > 0) {
                    nodePathList[0].replace(valueAst);
                }
            }
            return ast;
        },
        replaceAstByAst(oldAst, newAst, _index) {
            if (oldAst.parent && oldAst.parent.node && oldAst.parent.node.content) {
                oldAst.parent.node.content.children.splice(
                    _index,
                    1,
                    newAst
                );
            } else Eif (oldAst.node.nodeType == 'document') {
                oldAst.node.content.children = [newAst];
            }
        },
        replaceSelBySel(
            ast,
            selector,
            replacer,
            strictSequence,
            parseOptions,
            expando = 'g123o456g789o'
        ) {
            // 用于结构不一致的，整体替换
            if (ast.node) {
                ast = ast.node;
            }
            const { nodePathList, matchWildCardList } = core.getAstsBySelector(
                ast,
                selector,
                {
                    strictSequence,
                    deep: 'nn',
                    parseOptions: this.parseOptions || parseOptions,
                    expando
                }
            );
            const originReplacer = replacer;
            nodePathList.forEach((path, i) => {
                const extra = matchWildCardList[i];
                replacer = originReplacer;
                Iif (typeof replacer == 'function') {
                    replacer = replacer(extra, path);
                }
                if (Object.keys(extra).length > 0 && typeof replacer == 'string') {
                    let newReplacer = replacer;
                    for (let key in extra) {
                        if (key.match(/\$\$\$/)) {
                            let key$$$ = key.replace(/\$\$\$/, '');
                            key$$$ == '$' && (key$$$ = '');
                            let join = '\n';

                            let wildCardCode = extra[key]
                                .map((item) => {
                                    let codeStr = '';
                                    if (item.key) {
                                        Eif (item.value) {
                                            codeStr = `${item.key.content}="${item.value.content}"`;
                                        } else {
                                            codeStr = item.key.content;
                                        }
                                    } else if (item.nodeType == 'text') {
                                        codeStr = item.content.value.content;
                                    } else Eif (item.nodeType == 'tag') {
                                        codeStr = generate(item);
                                    }
                                    try {
                                        // 嵌套replace
                                        const childAst = core.buildAstByAstStr(
                                            generate(item), {}, { isProgram: true }
                                        );
                                        core.replaceSelBySel(
                                            childAst,
                                            selector,
                                            replacer,
                                            strictSequence,
                                            parseOptions,
                                            expando
                                        );
                                        codeStr = generate(childAst);
                                    } catch (e) {
                                        //
                                    }
                                    return codeStr;
                                })
                                .join(join);
                            // 不能都用,连接，还是需要找到$_$
                            newReplacer = newReplacer.replace(
                                '$$$' + key$$$,
                                wildCardCode
                            );
                        } else {
                            let wildCardCode = extra[key][0].value;
                            key == '0' && (key = '');
                            newReplacer = newReplacer
                                .replace(new RegExp(`\\$_\\$${key}`, 'g'), wildCardCode);
                            // 通过选择器替换ast，返回完整ast
                        }
                    }
                    core.replace(path, newReplacer)
                } else {
                    core.replace(path, replacer)
                }
            });
        },
        replace(oldPath, newReplacer) {
            let parentContent, index, isDoc, newNodes;
            Iif (oldPath.node.nodeType == 'document') {
                isDoc = true;
            } else {
                parentContent = oldPath.parent.node.content.children || [];
                index = parentContent.indexOf(oldPath.node);
            }
            if (!newReplacer) {
                // 删除节点
                Eif (index > -1) {
                    Iif (isDoc) {
                        oldPath.node.content.children = []
                    } else {
                        parentContent.splice(index, 1);
                    }
                }
                return;
            } else if (newReplacer.nodeType == 'document') {
                newNodes = newReplacer.content.children || []
            } else Eif (typeof newReplacer == 'string') {
                // 通过字符串解析为node
                Eif (index > -1) {
                    newNodes = core.buildAstByAstStr(
                        newReplacer,
                        {},
                        { isProgram: true }
                    ).content.children;
                }
            } else if (newReplacer[0] && newReplacer[0].nodePath) {
                // AST实例
                newNodes = [newReplacer.node]
            } else if (newReplacer.type) {
                // AST node
                newNodes = [newReplacer]
            }
            Iif (isDoc) {
                oldPath.node.content.children = newNodes
            } else {
                newNodes.forEach(newNode => {
                    newNode.parentRef = oldPath.parent.node;
                    parentContent.splice(index, 1, newNode);
                })
            }
        },
        removeAst(ast, selector, { strictSequence, parseOptions, expando } = {}) {
            if (!ast || typeof ast !== 'object') {
                throw new Error('remove failed! first argument mast be object');
            }
            if (
                !selector ||
                (typeof selector !== 'object' &&
                    typeof selector !== 'string' &&
                    !Array.isArray(selector))
            ) {
                throw new Error(
                    'remove failed! first argument mast be object、string or string array'
                );
            }
            // const selectorAst = getSelector(selector, this.parseOptions);
            // console.log(selectorAst)
            const { nodePathList } = core.getAstsBySelector(ast, selector, {
                strictSequence,
                parseOptions,
                expando
            });
            // const { nodePathList } = find.call(ast, selectorAst.nodeType, selectorAst.structure, true, 'nn');
            // console.log(nodePathList)
            nodePathList.forEach((path) => {
                // 多条语句逗号分割的话，只删除一个；一条语句的话，删除父节点
                const parentChildList = path.parent.node.content.children;
                const index = parentChildList.indexOf(path.node);
                parentChildList.splice(index, 1);
            });
        },
        remove(ast) {
            try {
                ast.node.parentRef.content.children.forEach((item, index) => {
                    if (item == ast.node) {
                        ast.node.parentRef.content.children.splice(index, 1);
                    }
                });
            } catch (e) {
                throw `remove failed! ${e}`;
            }
        }
    };

    module.exports = core;