From e89b42de408381c36f6b53522fb0d87a05d2adfe Mon Sep 17 00:00:00 2001
From: Pete Matsyburka <pete.matsy@gmail.com>
Date: Fri, 22 Dec 2023 13:33:53 +0200
Subject: [PATCH] add stamp field type

---
 app/javascript/submission_form/area.vue       | 16 +++-
 app/javascript/submission_form/form.vue       |  2 +-
 app/javascript/template_builder/builder.vue   | 10 ++-
 .../template_builder/field_type.vue           | 14 +--
 app/javascript/template_builder/fields.vue    |  4 +
 app/views/submissions/_value.html.erb         |  2 +-
 app/views/submissions/show.html.erb           |  2 +-
 lib/pdf_icons.rb                              | 18 +++-
 lib/submissions/generate_audit_trail.rb       |  2 +-
 .../generate_result_attachments.rb            |  2 +-
 lib/submitters/create_stamp_attachment.rb     | 89 +++++++++++++++++++
 lib/submitters/submit_values.rb               |  6 ++
 12 files changed, 151 insertions(+), 16 deletions(-)
 create mode 100644 lib/submitters/create_stamp_attachment.rb

diff --git a/app/javascript/submission_form/area.vue b/app/javascript/submission_form/area.vue
index 50f32288..c5c68353 100644
--- a/app/javascript/submission_form/area.vue
+++ b/app/javascript/submission_form/area.vue
@@ -42,6 +42,11 @@
       class="object-contain mx-auto"
       :src="image.url"
     >
+    <img
+      v-else-if="field.type === 'stamp' && stamp"
+      class="object-contain mx-auto"
+      :src="stamp.url"
+    >
     <img
       v-else-if="field.type === 'signature' && signature"
       class="object-contain mx-auto"
@@ -158,7 +163,7 @@
 </template>
 
 <script>
-import { IconTextSize, IconWritingSign, IconCalendarEvent, IconPhoto, IconCheckbox, IconPaperclip, IconSelect, IconCircleDot, IconChecks, IconCheck, IconColumns3, IconPhoneCheck, IconLetterCaseUpper, IconCreditCard } from '@tabler/icons-vue'
+import { IconTextSize, IconWritingSign, IconCalendarEvent, IconPhoto, IconCheckbox, IconPaperclip, IconSelect, IconCircleDot, IconChecks, IconCheck, IconColumns3, IconPhoneCheck, IconLetterCaseUpper, IconCreditCard, IconRubberStamp } from '@tabler/icons-vue'
 
 export default {
   name: 'FieldArea',
@@ -225,6 +230,7 @@ export default {
         signature: 'Signature',
         date: 'Date',
         image: 'Image',
+        stamp: 'Stamp',
         initials: 'Initials',
         file: 'File',
         select: 'Select',
@@ -246,6 +252,7 @@ export default {
         select: IconSelect,
         checkbox: IconCheckbox,
         radio: IconCircleDot,
+        stamp: IconRubberStamp,
         cells: IconColumns3,
         multiple: IconChecks,
         phone: IconPhoneCheck,
@@ -259,6 +266,13 @@ export default {
         return null
       }
     },
+    stamp () {
+      if (this.field.type === 'stamp') {
+        return this.attachmentsIndex[this.modelValue]
+      } else {
+        return null
+      }
+    },
     signature () {
       if (this.field.type === 'signature') {
         return this.attachmentsIndex[this.modelValue]
diff --git a/app/javascript/submission_form/form.vue b/app/javascript/submission_form/form.vue
index b70a2d2c..024f4e23 100644
--- a/app/javascript/submission_form/form.vue
+++ b/app/javascript/submission_form/form.vue
@@ -206,7 +206,7 @@
             </div>
           </div>
           <ImageStep
-            v-else-if="currentField.type === 'image'"
+            v-else-if="currentField.type === 'image' || currentField.type === 'stamp'"
             :key="currentField.uuid"
             v-model="values[currentField.uuid]"
             :field="currentField"
diff --git a/app/javascript/template_builder/builder.vue b/app/javascript/template_builder/builder.vue
index 87ad2511..048289a0 100644
--- a/app/javascript/template_builder/builder.vue
+++ b/app/javascript/template_builder/builder.vue
@@ -493,6 +493,10 @@ export default {
         field.options = [{ value: '', uuid: v4() }]
       }
 
+      if (type === 'stamp') {
+        field.readonly = true
+      }
+
       if (type === 'date') {
         field.preferences = {
           format: Intl.DateTimeFormat().resolvedOptions().locale.endsWith('-US') ? 'MM/DD/YYYY' : 'DD/MM/YYYY'
@@ -675,6 +679,10 @@ export default {
         field.options = [{ value: '', uuid: v4() }]
       }
 
+      if (field.type === 'stamp') {
+        field.readonly = true
+      }
+
       if (field.type === 'date') {
         field.preferences = {
           format: Intl.DateTimeFormat().resolvedOptions().locale.endsWith('-US') ? 'MM/DD/YYYY' : 'DD/MM/YYYY'
@@ -707,7 +715,7 @@ export default {
             w: area.maskW / 5 / area.maskW,
             h: (area.maskW / 5 / area.maskW) * (area.maskW / area.maskH)
           }
-        } else if (field.type === 'signature') {
+        } else if (field.type === 'signature' || field.type === 'stamp') {
           baseArea = {
             w: area.maskW / 5 / area.maskW,
             h: (area.maskW / 5 / area.maskW) * (area.maskW / area.maskH) / 2
diff --git a/app/javascript/template_builder/field_type.vue b/app/javascript/template_builder/field_type.vue
index 75e93739..623d2d43 100644
--- a/app/javascript/template_builder/field_type.vue
+++ b/app/javascript/template_builder/field_type.vue
@@ -46,7 +46,7 @@
 </template>
 
 <script>
-import { IconTextSize, IconWritingSign, IconCalendarEvent, IconPhoto, IconCheckbox, IconPaperclip, IconSelect, IconCircleDot, IconChecks, IconColumns3, IconPhoneCheck, IconLetterCaseUpper, IconCreditCard } from '@tabler/icons-vue'
+import { IconTextSize, IconWritingSign, IconCalendarEvent, IconPhoto, IconCheckbox, IconPaperclip, IconSelect, IconCircleDot, IconChecks, IconColumns3, IconPhoneCheck, IconLetterCaseUpper, IconCreditCard, IconRubberStamp } from '@tabler/icons-vue'
 
 export default {
   name: 'FiledTypeDropdown',
@@ -92,8 +92,9 @@ export default {
         multiple: 'Multiple',
         radio: 'Radio',
         cells: 'Cells',
-        phone: 'Phone',
-        payment: 'Payment'
+        stamp: 'Stamp',
+        payment: 'Payment',
+        phone: 'Phone'
       }
     },
     fieldIcons () {
@@ -104,13 +105,14 @@ export default {
         date: IconCalendarEvent,
         image: IconPhoto,
         file: IconPaperclip,
-        select: IconSelect,
         checkbox: IconCheckbox,
         radio: IconCircleDot,
+        select: IconSelect,
         multiple: IconChecks,
         cells: IconColumns3,
-        phone: IconPhoneCheck,
-        payment: IconCreditCard
+        stamp: IconRubberStamp,
+        payment: IconCreditCard,
+        phone: IconPhoneCheck
       }
     }
   },
diff --git a/app/javascript/template_builder/fields.vue b/app/javascript/template_builder/fields.vue
index b3f5e91c..89d8a271 100644
--- a/app/javascript/template_builder/fields.vue
+++ b/app/javascript/template_builder/fields.vue
@@ -261,6 +261,10 @@ export default {
         field.options = [{ value: '', uuid: v4() }]
       }
 
+      if (type === 'stamp') {
+        field.readonly = true
+      }
+
       if (type === 'date') {
         field.preferences = {
           format: Intl.DateTimeFormat().resolvedOptions().locale.endsWith('-US') ? 'MM/DD/YYYY' : 'DD/MM/YYYY'
diff --git a/app/views/submissions/_value.html.erb b/app/views/submissions/_value.html.erb
index 900b4e69..7ed33341 100644
--- a/app/views/submissions/_value.html.erb
+++ b/app/views/submissions/_value.html.erb
@@ -1,5 +1,5 @@
 <field-value class="flex absolute text-[1.5vw] lg:text-base" style="width: <%= area['w'] * 100 %>%; height: <%= area['h'] * 100 %>%; left: <%= area['x'] * 100 %>%; top: <%= area['y'] * 100 %>%">
-  <% if field['type'].in?(['signature', 'image', 'initials']) %>
+  <% if field['type'].in?(['signature', 'image', 'initials', 'stamp']) %>
     <img class="object-contain mx-auto" src="<%= attachments_index[value].url %>" loading="lazy">
   <% elsif field['type'].in?(['file', 'payment']) %>
     <autosize-field></autosize-field>
diff --git a/app/views/submissions/show.html.erb b/app/views/submissions/show.html.erb
index d390d633..0852bfdc 100644
--- a/app/views/submissions/show.html.erb
+++ b/app/views/submissions/show.html.erb
@@ -146,7 +146,7 @@
                   <div class="w-full bg-base-300 py-1">
                     <img class="object-contain mx-auto" height="<%= attachments_index[value].metadata['height'] %>" width="<%= attachments_index[value].metadata['width'] %>" src="<%= attachments_index[value].url %>" loading="lazy">
                   </div>
-                <% elsif field['type'] == 'image' %>
+                <% elsif field['type'].in?(['image', 'stamp']) %>
                   <img class="object-contain mx-auto max-h-28" height="<%= attachments_index[value].metadata['height'] %>" width="<%= attachments_index[value].metadata['width'] %>" src="<%= attachments_index[value].url %>" loading="lazy">
                 <% elsif field['type'] == 'file' || field['type'] == 'payment' %>
                   <div class="flex flex-col justify-center">
diff --git a/lib/pdf_icons.rb b/lib/pdf_icons.rb
index 6dac0b1c..784e917c 100644
--- a/lib/pdf_icons.rb
+++ b/lib/pdf_icons.rb
@@ -9,14 +9,26 @@ module PdfIcons
   module_function
 
   def check_io
-    @check_io ||= StringIO.new(PATH.join('check.png').read)
+    StringIO.new(check_data)
   end
 
   def paperclip_io
-    @paperclip_io ||= StringIO.new(PATH.join('paperclip.png').read)
+    StringIO.new(paperclip_data)
   end
 
   def logo_io
-    @logo_io ||= StringIO.new(PATH.join('logo.png').read)
+    StringIO.new(logo_data)
+  end
+
+  def check_data
+    @check_data ||= PATH.join('check.png').read
+  end
+
+  def paperclip_data
+    @paperclip_data ||= PATH.join('paperclip.png').read
+  end
+
+  def logo_data
+    @logo_data ||= PATH.join('logo.png').read
   end
 end
diff --git a/lib/submissions/generate_audit_trail.rb b/lib/submissions/generate_audit_trail.rb
index 5bdcc317..60daeb0c 100644
--- a/lib/submissions/generate_audit_trail.rb
+++ b/lib/submissions/generate_audit_trail.rb
@@ -192,7 +192,7 @@ module Submissions
                 }
               ].compact_blank, line_spacing: 1.8, padding: [0, 0, 5, 0]
             ),
-            if field['type'].in?(%w[image signature initials])
+            if field['type'].in?(%w[image signature initials stamp])
               attachment = submitter.attachments.find { |a| a.uuid == value }
               image = Vips::Image.new_from_buffer(attachment.download, '').autorot
 
diff --git a/lib/submissions/generate_result_attachments.rb b/lib/submissions/generate_result_attachments.rb
index 94a39db6..da363ff6 100644
--- a/lib/submissions/generate_result_attachments.rb
+++ b/lib/submissions/generate_result_attachments.rb
@@ -67,7 +67,7 @@ module Submissions
           canvas.font(FONT_NAME, size: font_size)
 
           case field['type']
-          when 'image', 'signature', 'initials'
+          when 'image', 'signature', 'initials', 'stamp'
             attachment = submitter.attachments.find { |a| a.uuid == value }
 
             image = Vips::Image.new_from_buffer(attachment.download, '').autorot
diff --git a/lib/submitters/create_stamp_attachment.rb b/lib/submitters/create_stamp_attachment.rb
new file mode 100644
index 00000000..ba51fb28
--- /dev/null
+++ b/lib/submitters/create_stamp_attachment.rb
@@ -0,0 +1,89 @@
+# frozen_string_literal: true
+
+module Submitters
+  module CreateStampAttachment
+    WIDTH = 400
+    HEIGHT = 200
+
+    TRANSPARENT_PIXEL = "\x89PNG\r\n\u001A\n\u0000\u0000\u0000\rIHDR\u0000" \
+                        "\u0000\u0000\u0001\u0000\u0000\u0000\u0001\b\u0004" \
+                        "\u0000\u0000\u0000\xB5\u001C\f\u0002\u0000\u0000\u0000" \
+                        "\vIDATx\xDAc\xFC_\u000F\u0000\u0002\x83\u0001\x804\xC3ڨ" \
+                        "\u0000\u0000\u0000\u0000IEND\xAEB`\x82"
+
+    module_function
+
+    def call(submitter)
+      image = generate_stamp_image(submitter)
+
+      image_data = image.write_to_buffer('.png')
+
+      checksum = Digest::MD5.base64digest(image_data)
+
+      attachment = submitter.attachments.joins(:blob).find_by(blob: { checksum: })
+
+      attachment || ActiveStorage::Attachment.create!(
+        blob: ActiveStorage::Blob.create_and_upload!(io: StringIO.new(image_data), filename: 'stamp.png'),
+        metadata: { analyzed: true, identified: true, width: image.width, height: image.height },
+        name: 'attachments',
+        record: submitter
+      )
+    end
+
+    # rubocop:disable Metrics
+    def generate_stamp_image(submitter)
+      logo = Vips::Image.new_from_buffer(load_logo(submitter).read, '')
+
+      logo = logo.resize([WIDTH / logo.width.to_f, HEIGHT / logo.height.to_f].min)
+
+      base_layer = Vips::Image.black(WIDTH, HEIGHT).new_from_image([255, 255, 255]).copy(interpretation: :srgb)
+
+      opacity_layer = Vips::Image.new_from_buffer(TRANSPARENT_PIXEL, '').resize(WIDTH)
+
+      text = build_text_image(submitter)
+
+      text_layer = text.new_from_image([0, 0, 0]).copy(interpretation: :srgb)
+      text_layer = text_layer.bandjoin(text)
+
+      base_layer = base_layer.composite(logo, 'over',
+                                        x: (WIDTH - logo.width) / 2,
+                                        y: (HEIGHT - logo.height) / 2)
+
+      base_layer = base_layer.composite(opacity_layer, 'over')
+
+      base_layer.composite(text_layer, 'over',
+                           x: (WIDTH - text_layer.width) / 2,
+                           y: (HEIGHT - text_layer.height) / 2)
+    end
+    # rubocop:enable Metrics
+
+    def build_text_image(submitter)
+      time = I18n.l(submitter.completed_at.in_time_zone(submitter.account.timezone), format: :long,
+                                                                                     locale: submitter.account.locale)
+
+      timezone = TimeUtils.timezone_abbr(submitter.account.timezone, submitter.completed_at)
+
+      name = if submitter.name.present? && submitter.email.present?
+               "#{submitter.name} #{submitter.email}"
+             else
+               submitter.name || submitter.email || submitter.phone
+             end
+
+      role = if submitter.submission.template_submitters.size > 1
+               item = submitter.submission.template_submitters.find { |e| e['uuid'] == submitter.uuid }
+
+               "Role: #{item['name']}\n"
+             else
+               ''
+             end
+
+      text = %(<span size="90">Digitally signed by: <b>#{name}</b>\n#{role}#{time} #{timezone}</span>)
+
+      Vips::Image.text(text, width: WIDTH, height: HEIGHT)
+    end
+
+    def load_logo(_submitter)
+      PdfIcons.logo_io
+    end
+  end
+end
diff --git a/lib/submitters/submit_values.rb b/lib/submitters/submit_values.rb
index 193f35e9..b2a44280 100644
--- a/lib/submitters/submit_values.rb
+++ b/lib/submitters/submit_values.rb
@@ -74,6 +74,12 @@ module Submitters
       default_values = submitter.submission.template_fields.each_with_object({}) do |field, acc|
         next if field['submitter_uuid'] != submitter.uuid
 
+        if field['type'] == 'stamp'
+          acc[field['uuid']] ||= Submitters::CreateStampAttachment.call(submitter).uuid
+
+          next
+        end
+
         value = field['default_value']
 
         next if value.blank?