XeNote/lib/utils.js

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JavaScript
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import {Node} from "./node"
import {Transformer} from "./transformer";
import unified from "unified";
import markdown from "remark-parse";
import {toString} from 'mdast-util-to-string'
import path from "path";
import fs from "fs";
const dirTree = require("directory-tree");
export function getContent(slug) {
let currentFilePath = toFilePath(slug)
if (currentFilePath === undefined || currentFilePath == null) return null
return Node.readFileSync(currentFilePath)
}
export function getShortSummary(slug) {
const content = getContent(slug)
if (content === undefined || content === null) {
return
}
const tree = unified().use(markdown)
.parse(content)
let plainText = toString(tree)
return plainText.split(" ").splice(0, 40).join(" ")
}
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export function getAllMarkdownFiles() {
return Node.getFiles(Node.getMarkdownFolder())
}
export function getSinglePost(slug) {
// List of filenames that will provide existing links to wikilink
let currentFilePath = toFilePath(slug)
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//console.log("currentFilePath: ", currentFilePath)
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var fileContent = Node.readFileSync(currentFilePath)
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const currentFileFrontMatter = Transformer.getFrontMatterData(fileContent)
// console.log("===============\n\nFile is scanning: ", slug)
const [htmlContent] = Transformer.getHtmlContent(fileContent)
// console.log("==================================")
//console.log("hrmlcontents and backlinks")
return {
id: slug,
// ...currentFileFrontMatter,
data: htmlContent,
}
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}
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const cachedSlugMap = getSlugHashMap()
export function toFilePath(slug) {
return cachedSlugMap[slug]
}
export function getSlugHashMap() {
// This is to solve problem of converting between slug and filepath,
// where previously if I convert a slug to a file path sometime
// it does not always resolve to correct filepath, converting function is not bi-directional
// and not conflict-free, other solution was considered (hash file name into a hash, but this
// is not SEO-friendly and make url look ugly ==> I chose this
const slugMap = new Map()
getAllMarkdownFiles().map(aFile => {
const aSlug = toSlug(aFile);
// if (slugMap.has(aSlug)) {
// slugMap[aSlug].push(aFile)
// } else {
// slugMap[aSlug] = [aFile]
// }
// Note: [Future improvement] Resolve conflict
slugMap[aSlug] = aFile
})
slugMap['index'] = Node.getMarkdownFolder() + "/index.md"
slugMap['/'] = Node.getMarkdownFolder() + "/index.md"
return slugMap
}
export function toSlug(filePath) {
if (Node.isFile(filePath) && filePath.includes(Node.getMarkdownFolder())) {
return filePath.replace(Node.getMarkdownFolder(), '')
.replaceAll('/', '__')
.replaceAll(' ', '++++')
.replaceAll('&', 'ambersand')
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.replace('.md', '')
} else {
//TODO handle this properly
return '/'
}
}
export function constructGraphData() {
const filepath = path.join(process.cwd(), "graph-data.json");
if (Node.isFile(filepath)) {
const data = fs.readFileSync(filepath);
return JSON.parse(String(data))
} else {
const filePaths = getAllMarkdownFiles();
const edges = []
const nodes = []
filePaths
.forEach(aFilePath => {
// const {currentFilePath} = getFileNames(filename)
const aNode = {
title: Transformer.parseFileNameFromPath(aFilePath),
slug: toSlug(aFilePath),
shortSummary: getShortSummary(toSlug(aFilePath))
}
nodes.push(aNode)
// console.log("Constructing graph for node: " + aFilePath )
const internalLinks = Transformer.getInternalLinks(aFilePath)
internalLinks.forEach(aLink => {
if (aLink.slug === null || aLink.slug.length === 0) return
const anEdge = {
source: toSlug(aFilePath),
target: aLink.slug,
}
edges.push(anEdge)
// console.log("Source: " + anEdge.source)
// console.log("Target: " + anEdge.target)
})
// console.log("==============Constructing graph" )
}
)
const data = {nodes, edges};
fs.writeFileSync(filepath, JSON.stringify(data), "utf-8");
return data;
}
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}
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export function getLocalGraphData(currentNodeId) {
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const {nodes, edges} = constructGraphData()
const newNodes = nodes.map(aNode => (
{
data: {
id: aNode.slug.toString(),
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label: Transformer.parseFileNameFromPath(toFilePath(aNode.slug)),
}
}
))
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const newEdges = edges.map(anEdge => ({
data: {
source: anEdge.source,
target: anEdge.target,
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}
}))
const existingNodeIDs = newNodes.map(aNode => aNode.data.id)
currentNodeId = currentNodeId === 'index' ? '__index' : currentNodeId
if (currentNodeId != null && existingNodeIDs.includes(currentNodeId)) {
const outGoingNodeIds = newEdges
.filter(anEdge => anEdge.data.source === currentNodeId)
.map(anEdge => anEdge.data.target)
const incomingNodeIds = newEdges
.filter(anEdge => anEdge.data.target === currentNodeId)
.map(anEdge => anEdge.data.source)
outGoingNodeIds.push(currentNodeId)
const localNodeIds = incomingNodeIds.concat(outGoingNodeIds.filter(item => incomingNodeIds.indexOf(item) < 0))
if (localNodeIds.indexOf(currentNodeId) < 0) {
localNodeIds.push(currentNodeId)
}
const localNodes = newNodes.filter(aNode => localNodeIds.includes(aNode.data.id))
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let localEdges = newEdges.filter(edge => localNodeIds.includes(edge.data.source)).filter(edge => localNodeIds.includes(edge.data.target));
// Filter self-reference edges
localEdges = localEdges.filter(edge => edge.data.source !== edge.data.target)
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// TODO: Find out why target ==='/' in some case
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localEdges = localEdges.filter(edge => edge.data.target !== '/')
return {
nodes: localNodes,
edges: localEdges
}
} else {
const filteredEdges = newEdges
.filter(edge => existingNodeIDs.includes(edge.data.source))
.filter(edge => existingNodeIDs.includes(edge.data.target))
return {
nodes: newNodes,
edges: filteredEdges
}
}
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}
export function getAllSlugs() {
//console.log("\n\nAll Posts are scanning")
// Get file names under /posts
const filePaths = Node.getFiles(Node.getMarkdownFolder()).filter(f => !(f.endsWith("index") || f.endsWith("sidebar")))
return filePaths.map(f => toSlug(f))
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}
export function getDirectoryData() {
const filteredDirectory = dirTree(Node.getMarkdownFolder(), {extensions: /\.md/});
return convertObject(filteredDirectory)
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}
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let _counter = 0;
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export function convertObject(thisObject) {
const children = []
let routerPath = getAllSlugs().find(slug => {
const fileName = Transformer.parseFileNameFromPath(toFilePath(slug))
return Transformer.normalizeFileName(fileName) === Transformer.normalizeFileName(thisObject.name)
}) || null
routerPath = routerPath ? '/note/' + routerPath : null
const newObject = {
name: thisObject.name,
children: children,
id: (_counter++).toString(),
routePath: routerPath || null
};
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if (thisObject.children != null && thisObject.children.length > 0) {
thisObject.children.forEach(aChild => {
const newChild = convertObject(aChild)
children.push(newChild)
})
return newObject;
} else {
return newObject
}
}
function flat(array) {
var result = [];
array.forEach(function (a) {
result.push(a);
if (Array.isArray(a.children)) {
result = result.concat(flat(a.children));
}
});
return result;
}
export function getFlattenArray(thisObject) {
return flat(thisObject.children)
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}