photo.copy_to_local_file(:original) before local ImageMagick - thoughtbot/paperclip#2028

Author: jywarren

app/assets/javascripts/analyze.js

@@ -290,13 +290,6 @@ $W = {
     f.submit();
   },
 
-  set_sample_row: function() {
-    var rownum = prompt('Enter the percentage from the top edge from which you would like to extract a spectrum.','100')
-    $("#imagelink")[0].onclick = ""
-    $('#imagelink').tooltip('destroy')
-    if (rownum) window.location = '/spectrums/setsamplerow/'+$W.spectrum_id+'?row='+rownum/100.00
-  },
-
   click_to_set_sample_row: function() {
     $("#imagelink")[0].onclick = ""
     $('#imagelink').tooltip('destroy')

app/controllers/spectrums_controller.rb

@@ -468,21 +468,6 @@ def match
     render html: @spectrum.find_match_in_set(params[:set]).to_json
   end
 
-  # Start doing this client side!
-  def setsamplerow
-    require 'rubygems'
-    require 'rmagick'
-    @spectrum = Spectrum.find params[:id]
-    require_ownership(@spectrum)
-    image = Magick::ImageList.new('public' + (@spectrum.photo.url.split('?')[0]).gsub('%20', ' '))
-    @spectrum.sample_row = (params[:row].to_f * image.rows)
-    @spectrum.extract_data
-    @spectrum.save
-    flash[:warning] = "If this spectrum image is not perfectly vertical, you may need to recalibrate after <a href='//publiclab.org/wiki/spectral-workbench-calibration#Cross+section'>setting a new cross-section</a>."
-    redirect_to spectrum_path(@spectrum)
-  end
-
-  # Start doing this client side!
   def find_brightest_row
     @spectrum = Spectrum.find params[:id]
     require_ownership(@spectrum)

app/models/spectrum.rb

@@ -114,7 +114,8 @@ def self.weekly_tallies
 
   # finds the brightest row of the image and uses that as its sample row
   def find_brightest_row
-    image = Magick::ImageList.new('public' + (photo.url.split('?')[0]).gsub('%20', ' '))
+    photo.copy_to_local_file(:original)
+    image = Magick::ImageList.new(local_photo_path)
     brightest_row = 0
     brightest = 0
     # sum brightness for each row
@@ -140,7 +141,8 @@ def find_brightest_row
   def extract_data
     pixels = []
 
-    image = Magick::ImageList.new('public' + (photo.url.split('?')[0]).gsub('%20', ' '))
+    photo.copy_to_local_file(:original)
+    image = Magick::ImageList.new(local_photo_path)
     # saved sample_row may be greater than image height, so temporarily compensate,
     # but preserve sample_row in case we rotate back or something
     self.sample_row = image.rows - 2 if sample_row > image.rows
@@ -278,15 +280,17 @@ def clone_calibration(clone_id)
 
   # rotate clockwise
   def rotate
-    image = Magick::ImageList.new('public' + (photo.url.split('?')[0]).gsub('%20', ' '))
+    photo.copy_to_local_file(:original)
+    image = Magick::ImageList.new(local_photo_path)
     image.rotate!(-90)
     image.write('public' + photo.url)
     photo.reprocess!
   end
 
   # horizontally flips image to match reversed spectrum, toggles 'reversed' flag
   def reverse
-    image = Magick::ImageList.new('public' + (photo.url.split('?')[0]).gsub('%20', ' '))
+    photo.copy_to_local_file(:original)
+    image = Magick::ImageList.new(local_photo_path)
     image.flop!
     image.write('public' + photo.url)
     self.reversed = !reversed
@@ -629,4 +633,9 @@ def find_similar(range)
   def spectrum_params
     params.require(:spectrum).permit(:title, :author, :user_id, :notes, :photo, :video_row, :data)
   end
-end
+
+  def local_photo_path
+    'public' + (photo.url.split('?')[0]).gsub('%20', ' ')
+  end
+
+end

config/routes.rb

@@ -160,7 +160,6 @@
   get 'spectrums/rss' => 'spectrums#rss'
   get 'spectrums/find_brightest_row' => 'spectrums#find_brightest_row'
   get 'spectrums/upload' => 'spectrums#upload'
-  get 'spectrums/setsamplerow' => 'spectrums#setsamplerow'
   get 'spectrums/rotate' => 'spectrums#rotate'
   get 'spectrums/fork' => 'spectrums#fork'
   get 'spectrums/reverse' => 'spectrums#reverse'