Draft Documents (#518)

* Mostly there

* Fix up specs

* Working scope, updated tests

* Don't record view on draft

* PR feedback

* Highlight drafts nav item

* Bugaboos

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* Refactoring, gradually addressing Jori feedback

* Show collection in drafts list
Flow fixes

* Ensure menu actions are hidden when draft

server/migrations/20180115021837-add-drafts.js

@@ -0,0 +1,27 @@
+module.exports = {
+  up: async (queryInterface, Sequelize) => {
+
+    await queryInterface.addColumn('documents', 'publishedAt', {
+      type: Sequelize.DATE,
+      allowNull: true,
+    });
+
+    const [documents, metaData] = await queryInterface.sequelize.query(`SELECT * FROM documents`);
+    for (const document of documents) {
+      await queryInterface.sequelize.query(`
+        update documents
+        set "publishedAt" = '${new Date(document.createdAt).toISOString()}'
+        where id  = '${document.id}'
+      `)
+    }
+
+    await queryInterface.removeIndex('documents', ['id', 'atlasId']);
+    await queryInterface.addIndex('documents', ['id', 'atlasId', 'publishedAt']);
+  },
+
+  down: async (queryInterface, Sequelize) => {
+    await queryInterface.removeColumn('documents', 'publishedAt');
+    await queryInterface.removeIndex('documents', ['id', 'atlasId', 'publishedAt']);
+    await queryInterface.addIndex('documents', ['id', 'atlasId']);
+  }
+};