Adding template tag to do formatting of ingredients quantity.

2 files changed, 35 insertions, 0 deletions

diff --git a/greenbox/recipe/templatetags/__init__.py b/greenbox/recipe/templatetags/__init__.py
new file mode 100644
index 0000000..9bd6204
--- /dev/null
+++ b/greenbox/recipe/templatetags/__init__.py
@@ -0,0 +1,4 @@
+from django import template
+
+
+register = template.Library()
diff --git a/greenbox/recipe/templatetags/ingredientformat.py b/greenbox/recipe/templatetags/ingredientformat.py
new file mode 100644
index 0000000..fa75633
--- /dev/null
+++ b/greenbox/recipe/templatetags/ingredientformat.py
@@ -0,0 +1,31 @@
+from recipe.templatetags import register
+from django.template.defaultfilters import stringfilter
+
+
+@register.filter(name="format_ingredient_quantity")
+@stringfilter
+def format_ingredient_quantity(value):
+    fractions = {
+        0.125: '1/8',
+        0.25 : '1/4',
+        0.33 : '1/3',
+        0.50 : '1/2',
+        0.66 : '2/3',
+        0.75 : '3/4',
+    }
+
+    value = float(value)
+    remainder = round(value % 1, 2)
+    whole = int(value - remainder)
+
+    if whole <= 0:
+        whole = ""
+    else:
+        whole = str(whole)
+
+    if remainder <= 0:
+        remainder = ""
+    else:
+        remainder = fractions.get(remainder, str(remainder))
+
+    return "{0} {1}".format(whole, remainder)