Feature: Knowledge Base APIs (#1002)

- Introduce models & migrations for portals, categories, folders and articles
- CRUD API for portals
- CRUD API for categories

Addresses: #714

Co-authored-by: Sojan <sojan@pepalo.com>

db/migrate/20200704135408_create_kbase_portals.rb

@@ -0,0 +1,17 @@
+class CreateKbasePortals < ActiveRecord::Migration[6.0]
+  def change
+    create_table :kbase_portals do |t|
+      t.integer :account_id, null: false
+      t.string :name, null: false
+      t.string :slug, null: false
+      t.string :custom_domain
+      t.string :color
+      t.string :homepage_link
+      t.string :page_title
+      t.text   :header_text
+
+      t.index :slug, unique: true
+      t.timestamps
+    end
+  end
+end

db/migrate/20200704135810_create_kbase_categories.rb

@@ -0,0 +1,13 @@
+class CreateKbaseCategories < ActiveRecord::Migration[6.0]
+  def change
+    create_table :kbase_categories do |t|
+      t.integer :account_id, null: false
+      t.integer :portal_id, null: false
+      t.string :name
+      t.text :description
+      t.integer :position
+
+      t.timestamps
+    end
+  end
+end

db/migrate/20200704140029_create_kbase_folders.rb

@@ -0,0 +1,11 @@
+class CreateKbaseFolders < ActiveRecord::Migration[6.0]
+  def change
+    create_table :kbase_folders do |t|
+      t.integer :account_id, null: false
+      t.integer :category_id, null: false
+      t.string :name
+
+      t.timestamps
+    end
+  end
+end

db/migrate/20200704140509_create_kbase_articles.rb

@@ -0,0 +1,18 @@
+class CreateKbaseArticles < ActiveRecord::Migration[6.0]
+  def change
+    create_table :kbase_articles do |t|
+      t.integer :account_id, null: false
+      t.integer :portal_id, null: false
+      t.integer :category_id
+      t.integer :folder_id
+      t.integer :author_id
+      t.string :title
+      t.text :description
+      t.text :content
+      t.integer :status
+      t.integer :views
+
+      t.timestamps
+    end
+  end
+end