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import fs from 'fs';
import path from 'path';
import Post from './Post';
import { dateToPath } from './utils';
import { Object as PlainObject } from './interfaces';
function mkDirByPathSync(targetDir: string) {
const sep = path.sep;
const initDir = path.isAbsolute(targetDir) ? sep : '';
const baseDir = '.';
return targetDir.split(sep).reduce((parentDir, childDir) => {
const curDir = path.resolve(baseDir, parentDir, childDir);
try {
fs.mkdirSync(curDir);
} catch (err) {
if (err.code === 'EEXIST') {
// curDir already exists!
return curDir;
}
// To avoid `EISDIR` error on Mac and `EACCES`-->`ENOENT` and `EPERM` on Windows.
if (err.code === 'ENOENT') {
// Throw the original parentDir error on curDir `ENOENT` failure.
throw new Error(`EACCES: permission denied, mkdir '${parentDir}'`);
}
const caughtErr = ['EACCES', 'EPERM', 'EISDIR'].indexOf(err.code) > -1;
if (!caughtErr || (caughtErr && targetDir === curDir)) {
throw err; // Throw if it's just the last created dir.
}
}
return curDir;
}, initDir);
}
export function saveApiEntry(post: Post, path: string) {
const dir = `${path}/api/posts/${dateToPath(post.date)}`;
mkDirByPathSync(dir);
const apiEntry = post.toApi();
fs.writeFile(
`${dir}/${post.fileTitle}.json`,
JSON.stringify(apiEntry),
(err) => (err ? console.log(err) : null)
);
}
//#Source https://bit.ly/2neWfJ2
function chunk (arr: Array<Post>, size: number): Array<Array<Post>> {
return Array.from({ length: Math.ceil(arr.length / size) }, (v, i) =>
arr.slice(i * size, i * size + size)
);
}
function parsePosts(post: Post) {
const apiEntry = post.toApi();
delete apiEntry.content;
return apiEntry;
}
/*
* This function generates api index on path `/api/posts`
*/
function generateApiIndex(posts: Array<Post>, path: string) {
const parsedPosts = posts.map(parsePosts);
const filePath = `${path}/api/posts.json`;
fs.writeFile(filePath, JSON.stringify(parsedPosts), (err) =>
err ? console.log(err) : null
);
}
/*
* This function generates pages on path `/api/page/<number>`
*/
function generatePages(posts: Array<Post>, path: string, len: number = 8) {
const pages = chunk(posts, len);
mkDirByPathSync(`${path}/api/page`);
pages.forEach((posts: Array<Post>, index: number) => {
const parsedPosts = posts.map(parsePosts);
const pageNumber = index + 1;
const page = { posts: parsedPosts, next : pageNumber + 1 };
if (pageNumber == pages.length) {
delete page.next;
}
fs.writeFile(`${path}/api/page/${pageNumber}.json`, JSON.stringify(page), (err) =>
err ? console.log(err) : null
);
})
}
function generateCategories(posts: Array<Post>, path: string) {
const categories: PlainObject = {};
posts.forEach((post) => {
const apiEntry = post.toApi();
delete apiEntry.content;
if (apiEntry.meta['category']) {
apiEntry.meta['category'].forEach((category: string) =>
categories[category]
? categories[category].push(apiEntry)
: (categories[category] = [apiEntry])
);
}
});
const dir = `${path}/api/category`;
mkDirByPathSync(dir);
Object.keys(categories).forEach((category) => {
const filePath = `${dir}/${category}.json`;
fs.writeFile(filePath, JSON.stringify(categories[category]), (err) =>
err ? console.log(err) : null
);
});
}
export function generateApi(posts: Array<Post>, path: string) {
try {
generateApiIndex(posts, path);
generateCategories(posts, path);
generatePages(posts, path);
posts.forEach((post) => saveApiEntry(post, path));
} catch (err) {
console.log(err);
}
}
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