Update poll validation to allow one-option polls if configured

.env.production.catcatnya

@@ -37,6 +37,7 @@ MAX_BIO_CHARS=6942
 MAX_PROFILE_FIELDS=10
 MAX_PINNED_TOOTS=10
 MAX_DISPLAY_NAME_CHARS=50
+MIN_POLL_OPTIONS=1
 MAX_POLL_OPTIONS=20
 MAX_SEARCH_RESULTS=1000
 MAX_REMOTE_EMOJI_SIZE=1048576

.env.production.sample

@@ -263,6 +263,9 @@ MAX_PROFILE_FIELDS=4
 # Maximum allowed display name characters
 MAX_DISPLAY_NAME_CHARS=30
 
+# Minimum allowed poll options. (Minimum of 1)
+MIN_POLL_OPTIONS=2
+
 # Maximum allowed poll options
 MAX_POLL_OPTIONS=5
 

app/validators/poll_validator.rb

@@ -1,7 +1,8 @@
 # frozen_string_literal: true
 
 class PollValidator < ActiveModel::Validator
-  MAX_OPTIONS      = (ENV['MAX_POLL_OPTIONS'] || 5).to_i
+  MIN_OPTIONS      = [1, (ENV['MIN_POLL_OPTIONS'] || 2).to_i].max
+  MAX_OPTIONS      = [MIN_OPTIONS, (ENV['MAX_POLL_OPTIONS'] || 5).to_i].max
   MAX_OPTION_CHARS = (ENV['MAX_POLL_OPTION_CHARS'] || 100).to_i
   MAX_EXPIRATION   = 1.month.freeze
   MIN_EXPIRATION   = 5.minutes.freeze
@@ -9,7 +10,7 @@ class PollValidator < ActiveModel::Validator
   def validate(poll)
     current_time = Time.now.utc
 
-    poll.errors.add(:options, I18n.t('polls.errors.too_few_options')) unless poll.options.size > 1
+    poll.errors.add(:options, I18n.t('polls.errors.too_few_options')) unless poll.options.size >= MIN_OPTIONS
     poll.errors.add(:options, I18n.t('polls.errors.too_many_options', max: MAX_OPTIONS)) if poll.options.size > MAX_OPTIONS
     poll.errors.add(:options, I18n.t('polls.errors.over_character_limit', max: MAX_OPTION_CHARS)) if poll.options.any? { |option| option.mb_chars.grapheme_length > MAX_OPTION_CHARS }
     poll.errors.add(:options, I18n.t('polls.errors.duplicate_options')) unless poll.options.uniq.size == poll.options.size