Use our font in pdf

app/models/pdf_documents/base.rb

@@ -0,0 +1,67 @@
+module PdfDocuments
+  class Base
+    def initialize(prawn_document, **params)
+      @prawn_document = prawn_document
+      @prawn_document.markup_options = markup_options
+      @prawn_document.font_families.update('Lexend' => {
+                                             normal: 'vendor/assets/fonts/Lexend-Light.ttf',
+                                             bold: 'vendor/assets/fonts/Lexend-Bold.ttf',
+                                             italic: 'vendor/assets/fonts/Lexend-Regular.ttf'
+                                           })
+      @prawn_document.font 'Lexend'
+      @params = OpenStruct.new(params)
+    end
+
+    def create
+      generate
+      @prawn_document
+    end
+
+    private
+
+    def generate
+      raise NotImplementedError
+    end
+
+    def heading1(text)
+      @prawn_document.markup "<h1><u>#{text}</u></h1>"
+    end
+
+    def heading2(text)
+      @prawn_document.markup "<h2>#{text}</h2>"
+    end
+
+    def heading2(text)
+      @prawn_document.markup "<h3>#{text}</h3>"
+    end
+
+    def text(text)
+      @prawn_document.text text, markup_options[:text]
+    end
+
+    def rich_text(text)
+      @prawn_document.markup prepare_rich_text(text)
+    end
+
+    def markup_options
+      {
+        text: { size: 10, margin_bottom: 10 },
+        heading1: { style: :bold, size: 24, margin_bottom: 10, margin_top: 20 },
+        heading2: { style: :bold, size: 18, margin_bottom: 10, margin_top: 15 },
+        heading3: { style: :bold, size: 16, margin_bottom: 10, margin_top: 10 },
+        heading4: { style: :bold, size: 14, margin_bottom: 10, margin_top: 5 },
+        heading5: { style: :bold, size: 14, margin_bottom: 10, margin_top: 5 },
+        heading6: { style: :thin, size: 14, margin_bottom: 10, margin_top: 5 }
+      }
+    end
+
+    def prepare_rich_text(rich_text)
+      { h1: 'h4' }.each do |tag, replacement|
+        rich_text = rich_text.to_s.gsub("<#{tag}", "<#{replacement}")
+        rich_text = rich_text.to_s.gsub("</#{tag}>", "</#{replacement}>")
+      end
+
+      rich_text
+    end
+  end
+end