Initial commit

.gitattributes

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+# Auto detect text files and perform LF normalization
+* text=auto

.gitignore

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+# Logs
+logs
+*.log
+npm-debug.log*
+yarn-debug.log*
+yarn-error.log*
+lerna-debug.log*
+
+# Diagnostic reports (https://nodejs.org/api/report.html)
+report.[0-9]*.[0-9]*.[0-9]*.[0-9]*.json
+
+# Runtime data
+pids
+*.pid
+*.seed
+*.pid.lock
+
+# Directory for instrumented libs generated by jscoverage/JSCover
+lib-cov
+
+# Coverage directory used by tools like istanbul
+coverage
+*.lcov
+
+# nyc test coverage
+.nyc_output
+
+# Grunt intermediate storage (https://gruntjs.com/creating-plugins#storing-task-files)
+.grunt
+
+# Bower dependency directory (https://bower.io/)
+bower_components
+
+# node-waf configuration
+.lock-wscript
+
+# Compiled binary addons (https://nodejs.org/api/addons.html)
+build/Release
+
+# Dependency directories
+node_modules/
+jspm_packages/
+
+# TypeScript v1 declaration files
+typings/
+
+# TypeScript cache
+*.tsbuildinfo
+
+# Optional npm cache directory
+.npm
+
+# Optional eslint cache
+.eslintcache
+
+# Microbundle cache
+.rpt2_cache/
+.rts2_cache_cjs/
+.rts2_cache_es/
+.rts2_cache_umd/
+
+# Optional REPL history
+.node_repl_history
+
+# Output of 'npm pack'
+*.tgz
+
+# Yarn Integrity file
+.yarn-integrity
+
+# dotenv environment variables file
+.env
+.env.test
+
+# parcel-bundler cache (https://parceljs.org/)
+.cache
+
+# Next.js build output
+.next
+
+# Nuxt.js build / generate output
+.nuxt
+dist
+
+# Gatsby files
+.cache/
+# Comment in the public line in if your project uses Gatsby and *not* Next.js
+# https://nextjs.org/blog/next-9-1#public-directory-support
+# public
+
+# Serverless directories
+.serverless/
+
+# FuseBox cache
+.fusebox/
+
+# DynamoDB Local files
+.dynamodb/
+
+# TernJS port file
+.tern-port

.npmignore

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+logs
+*.log
+node_modules
+*.un~
+yarn.lock
+package-lock.json
+flow-typed
+coverage
+decls
+examples
+.gitattributes
+gatsby-plugin-seo.code-workspace

LICENSE

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+MIT License
+
+Copyright (c) 2020 Pittica S.r.l.s.
+
+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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+# pittica/gatsby-plugin-seo
+
+![License](https://img.shields.io/github/license/pittica/gatsby-plugin-seo)
+![Version](https://img.shields.io/github/package-json/v/pittica/gatsby-plugin-seo)
+![Release](https://img.shields.io/github/v/release/pittica/gatsby-plugin-seo)
+![GitHub package.json dependency version (dev dep on branch)](https://img.shields.io/github/package-json/dependency-version/pittica/gatsby-plugin-seo/dev/gatsby)
+![GitHub package.json dependency version (dev dep on branch)](https://img.shields.io/github/package-json/dependency-version/pittica/gatsby-plugin-seo/dev/react)
+
+## Description
+
+SEO plugin for [GatsbyJS](https://www.gatsbyjs.org/).
+
+## Install
+
+[![npm](https://img.shields.io/npm/v/@pittica/gatsby-plugin-seo)](https://www.npmjs.com/package/@pittica/gatsby-plugin-seo)
+
+```shell
+npm install @pittica/gatsby-plugin-seo
+```
+
+## Usage
+
+The plugin provides SEO optimization.
+
+## Configuration
+
+Edit your **gatsby-config.js**.
+
+```javascript
+module.exports = {
+  plugins: [
+    {
+      resolve: `@pittica/gatsby-plugin-seo`,
+      options: {
+        image: `/DEFAULT_SHARING_IMAGE.jpg`,
+        socials: {
+          instagram: {
+            username: `INSTAGRAM_USERNAME`
+          },
+          github: {
+            username: `GITHUB_USERNAME`
+          },
+          facebook: {
+            page: `FACEBOOK_PAGE_USERNAME`,
+			      app: `FACEBOOK_APP_ID`
+          },
+          twitter: {
+            username: `TWITTER_USERNAME`,
+			      site: `TWITTER_SITE_USERNAME`
+          }
+        }
+    },
+  ],
+}
+```
+
+## Copyright
+
+(c) 2020, Pittaca S.r.l.s.

gatsby-node.js

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+const loadsh = require(`lodash`)
+
+exports.onCreateNode = ({ node, actions }, options) => {
+  const { createNodeField } = actions
+
+  if (node.id === `SiteBuildMetadata`) {
+    const socials = loadsh.merge({
+      instagram: {
+        username: ``
+      },
+      github: {
+        username: ``
+      },
+      facebook: {
+        page: ``,
+        app: ``
+      },
+      twitter: {
+        username: ``,
+        site: ``
+      }
+    }, options.socials || {})
+
+    createNodeField({
+      name: `seo`,
+      node,
+      value: {
+        image: options.image,
+        socials
+      }
+    })
+  }
+}

gatsby-plugin-seo.code-workspace

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+{
+	"folders": [
+		{
+			"path": "."
+		}
+	],
+	"settings": {}
+}

index.js

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+import OpenGraph from "./src/open-graph"
+import TwitterCard from "./src/twitter-card"
+import SchemaOrg from "./src/schema-org"
+import SEO from "./src/seo"
+
+export { SEO, SchemaOrg, OpenGraph, TwitterCard }

package.json

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+{
+  "name": "@pittica/gatsby-plugin-seo",
+  "private": false,
+  "description": "SEO optimization plugin for GatsbyJS.",
+  "version": "1.0.0",
+  "author": {
+    "name": "Lucio Benini",
+    "email": "info@pittica.com",
+    "url": "https://pittica.com"
+  },
+  "bugs": {
+    "url": "https://github.com/pittica/gatsby-plugin-seo/issues"
+  },
+  "deprecated": false,
+  "homepage": "https://github.com/pittica/gatsby-plugin-seo",
+  "keywords": [
+    "gatsby",
+    "gatsby-plugin",
+    "seo",
+    "social-networks"
+  ],
+  "dependencies": {
+    "prop-types": "^15.7.2",
+    "gatsby-plugin-react-helmet": "^3.3.1"
+  },
+  "devDependencies": {
+    "gatsby": "^2.21.22",
+    "react": "^16.13.1",
+    "react-helmet": "^6.0.0",
+    "react-dom": "^16.13.1",
+    "lodash": "^4.17.15"
+  },
+  "license": "MIT",
+  "main": "index.js",
+  "repository": {
+    "type": "git",
+    "url": "git+https://github.com/pittica/gatsby-plugin-seo.git"
+  }
+}

src/open-graph.js

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+import React from "react"
+import { Helmet } from "react-helmet"
+import { useStaticQuery, graphql } from "gatsby"
+import PropTypes from "prop-types"
+
+const OpenGraph = ({ url, title, article, description, image }) => {
+  const data = useStaticQuery(
+    graphql`
+      query {
+        site {
+          siteMetadata {
+            locale {
+              language
+              culture
+            }
+          }
+        }
+        siteBuildMetadata {
+          fields {
+            seo {
+              socials {
+                facebook {
+                  page
+                  app
+                }
+              }
+            }
+          }
+        }
+      }
+    `
+  )
+  const facebook = data.siteBuildMetadata.fields.seo.socials.facebook
+
+  return (
+    <Helmet>
+      <meta property="og:url" content={url} />
+      {article ? <meta property="og:type" content="article" /> : null}
+      <meta property="og:title" content={title} />
+      <meta
+        property="og:locale"
+        content={[
+          data.site.siteMetadata.locale.language.toLowerCase(),
+          data.site.siteMetadata.locale.culture.toUpperCase()
+        ].join("_")}
+      />
+      <meta property="og:description" content={description} />
+      {image ? (
+        <meta property="og:image" content={image} />
+      ) : null}
+      {facebook.app ? (
+        <meta property="fb:app_id" content={facebook.app} />
+      ) : null}
+      {article && facebook.page ? (
+        <meta
+          property="article:publisher"
+          content={"https://www.facebook.com/" + facebook.page}
+        />
+      ) : null}
+    </Helmet>
+  )
+}
+
+OpenGraph.propTypes = {
+  url: PropTypes.string,
+  article: PropTypes.bool,
+  image: PropTypes.string,
+  title: PropTypes.string.isRequired,
+  description: PropTypes.string.isRequired
+}
+
+OpenGraph.defaultProps = {
+  url: null,
+  article: false,
+  image: null,
+  title: null,
+  description: null
+}
+
+export default OpenGraph