init commit

LICENSE

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+MIT License
+
+Copyright (c) 2017 Nunki
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

README.md

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+## Installation
+you install it with npm : 
+```
+   npm i @sa/link-preview
+```
+## Usage
+You can include it easly :
+### ES6
+```javascript
+	import linPreview from "@sa/link-preview";
+```
+### ES5
+```javascript
+	var linkPreview = require("@sa/link-preview");
+```
+### Parameters
+#### url
+Type: `String`
+#### timeout
+Type: `Number`
+### Value Returned
+Type: `Promise`
+
+Resolved value:
+```javascript
+    {
+        description:"GitHub is where people build software. More than 24 million people use GitHub to discover, fork, and contribute to over 67 million projects.",
+        image:"https://assets-cdn.github.com/images/modules/open_graph/github-logo.png",
+        imageHeight:"1200",
+        imageType:"image/png",
+        imageWidth:"1200",
+        siteName:"GitHub",
+        title:"Build software better, together",
+        url:"http://github.com"
+    }
+```
+Reject if url is `undefined`
+
+Rejected value:
+```javascript
+    { message: "You must add a valid url" }
+```
+
+### Syntaxe
+
+```javascript
+    linkPreview("https://github.com").then(response => {
+            /*  response = {
+                    description:"GitHub is where people build software. More than 24 million people use GitHub to discover, fork, and contribute to over 67 million projects.",
+                    image:"https://assets-cdn.github.com/images/modules/open_graph/github-logo.png",
+                    imageHeight:"1200",
+                    imageType:"image/png",
+                    imageWidth:"1200",
+                    siteName:"GitHub",
+                    title:"Build software better, together",
+                    url:"http://github.com"
+                }
+            */
+    });
+    linkPreview("https://github.com",1000).then(response => {
+            /*  if https://github.com answer before 1000ms 
+                    response = {
+                        description:"GitHub is where people build software. More than 24 million people use GitHub to discover, fork, and contribute to over 67 million projects.",
+                        image:"https://assets-cdn.github.com/images/modules/open_graph/github-logo.png",
+                        imageHeight:"1200",
+                        imageType:"image/png",
+                        imageWidth:"1200",
+                        siteName:"GitHub",
+                        title:"Build software better, together",
+                        url:"http://github.com"
+                    }
+                else
+                    response = {
+                        description: null,
+                        image:null,
+                        imageHeight:null,
+                        imageType:null,
+                        imageWidth:null,
+                        siteName:null,
+                        title:null,
+                        url:"https://ozbezpicybeu.com"
+                    }
+            */
+    });
+    linkPreview("https://ozbezpicybeu.com")then(response => {
+            /*  response = {
+                    description: null,
+                    image:null,
+                    imageHeight:null,
+                    imageType:null,
+                    imageWidth:null,
+                    siteName:null,
+                    title:null,
+                    url:"https://ozbezpicybeu.com"
+                }
+            */
+    });
+    linkPreview("test")then(response => {
+            /*  response = {
+                    description: null,
+                    image:null,
+                    imageHeight:null,
+                    imageType:null,
+                    imageWidth:null,
+                    siteName:null,
+                    title:null,
+                    url:"test"
+                }
+            */
+    });
+    linkPreview()then(() => {}).catch(err => {
+        /*
+            err = { message: "You must add a valid url" }
+        */
+    });
+```

index.js

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+const cheerio = require("cheerio");
+const request = require("request");
+
+const getByProp = ($, property) =>
+  $(`meta[property='${property}']`)
+    .first()
+    .attr("content") || null;
+
+function collectMeta($, url, deepVideo) {
+  const ogUrl = getByProp($, "og:url");
+  const ogVideoUrl = getByProp($, "og:video:secure_url") || getByProp($, "og:video:url");
+  const res = {
+    url,
+    image: getByProp($, "og:image"),
+    imageWidth: getByProp($, "og:image:width"),
+    imageHeight: getByProp($, "og:image:height"),
+    imageType: getByProp($, "og:image:type"),
+    title: getByProp($, "og:title"),
+    description: getByProp($, "og:description"),
+    siteName: getByProp($, "og:site_name"),
+    ogVideoUrl: (ogVideoUrl || "").indexOf("youtube.com") >= 0 ? null : ogVideoUrl,
+    ogUrl,
+    youtube:
+      (ogVideoUrl || "").indexOf("youtube.com") >= 0
+        ? ogVideoUrl
+        : !ogUrl ? null : ogUrl.indexOf("youtube.com") >= 0 ? `https://youtube.com/embed/${getValue(ogUrl, "v")}` : null
+  };
+  if (deepVideo && !res.ogVideoUrl && !res.youtube)
+    return getDeepVideo(
+      (getByProp($, "og:description") || "").match(/(http(s)?:\/\/([a-z0-9]+\.)+[a-z0-9]+(\/[a-z0-9]+)?)/gi)
+    ).then(ogVideoUrl => {
+      videoUrl = ogVideoUrl.filter(url => !!url)[0] || "";
+      return Object.assign(res, {
+        [videoUrl.indexOf("youtube.com") >= 0 ? "youtube" : "ogVideoUrl"]: videoUrl || null
+      });
+    });
+  return Promise.resolve(res);
+}
+
+const getDeepVideo = urls => {
+  if (!urls) return Promise.resolve([null]);
+  return Promise.all(
+    urls.map(url =>
+      linkPreview
+        .makeRequest(url, 10000)
+        .then(
+          ({ response, body }) =>
+            !response || response.statusCode !== 200
+              ? null
+              : getByProp(cheerio.load(body), "og:video:secure_url") || getByProp(cheerio.load(body), "og:video:url")
+        )
+    )
+  );
+};
+
+const getValue = (url, name) => {
+  const i = url.indexOf(`${name}=`) + name.length + 1;
+  const j = url.indexOf("&", i);
+  const end = j < 0 ? url.length : j;
+  return i < 0 ? "" : url.slice(i, end);
+};
+
+const getError = url => ({
+  url,
+  image: null,
+  imageWidth: null,
+  imageHeight: null,
+  imageType: null,
+  title: undefined,
+  description: null,
+  siteName: null
+});
+
+function linkPreview(url, deepVideo = false, timeout = 100000) {
+  if (!url || url === "") return Promise.reject({ message: "You must add a valid url" });
+  if (!url.match(/^http(s)?:\/\/[a-z]+\.[a-z]+(.)+/i)) return Promise.resolve(getError(url));
+  return linkPreview.makeRequest(url, timeout).then(({ response, body }) => {
+    if (!response) return getError(url);
+    if (response.statusCode === 200) return collectMeta(cheerio.load(body), url, deepVideo);
+    return getError(url);
+  });
+}
+
+linkPreview.makeRequest = (url, timeout) =>
+  new Promise((resolve, reject) => {
+    request(url, { timeout: timeout }, (error, response, body) => resolve({ body, response }));
+  });
+
+module.exports = linkPreview;

package.json

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+{
+  "dependencies": {
+    "cheerio": "1.0.0-rc.2",
+    "request": "2.82.0"
+  },
+  "devDependencies": {
+    "codecov": "2.3.0",
+    "commitizen": "^2.9.6",
+    "cz-conventional-changelog": "^2.0.0",
+    "ghooks": "^2.0.0",
+    "jest": "21.1.0",
+    "semantic-release": "^7.0.0",
+    "sinon": "^4.1.3",
+    "surge": "^0.19.0"
+  },
+  "homepage": "https://github.com/teamSolutionAnalysts/link-preview#readme",
+  "keywords": [
+    "link",
+    "preview",
+    "nunki",
+    "node.js"
+  ],
+  "license": "MIT",
+  "main": "index.js",
+  "name": "@sa/link-preview",
+  "private": false,
+  "repository": {
+    "type": "git",
+    "url": "git+https://github.com/teamSolutionAnalysts/link-preview.git"
+  },
+  "scripts": {},
+  "version": "1.0.0"
+}