Adding rubocop sample config (#547)

* Adding rubocop sample config

* Removing double_quotes enforcement

* Using same rubocop yaml as in Plots2

* Autofixing rubocop offenses

* Fixing conditions for CC

Co-Authored-By: Sasha Boginsky <41092741+sashadev-sky@users.noreply.github.com>

* Adding Performance cop and fixing some offenses

* Fixing rubocop offenses and warnings

* Downgrading rubocop version since https://github.com/publiclab/mapknitter/pull/547#issuecomment-497359929

.rubocop_todo.yml

@@ -0,0 +1,142 @@
+# This configuration was generated by
+# `rubocop --auto-gen-config`
+# on 2019-03-02 16:51:15 +0100 using RuboCop version 0.65.0.
+# The point is for the user to remove these configuration records
+# one by one as the offenses are removed from the code base.
+# Note that changes in the inspected code, or installation of new
+# versions of RuboCop, may require this file to be generated again.
+
+# Offense count: 180
+Metrics/AbcSize:
+  Max: 178
+
+# Offense count: 13
+# Configuration parameters: CountComments, ExcludedMethods.
+# ExcludedMethods: refine
+Metrics/BlockLength:
+  Max: 257
+
+# Offense count: 24
+# Configuration parameters: CountBlocks.
+Metrics/BlockNesting:
+  Max: 6
+
+# Offense count: 50
+Metrics/CyclomaticComplexity:
+  Max: 28
+
+# Offense count: 171
+# Configuration parameters: CountComments, ExcludedMethods.
+Metrics/MethodLength:
+  Max: 86
+
+# Offense count: 2
+# Configuration parameters: CountComments.
+Metrics/ModuleLength:
+  Max: 347
+
+# Offense count: 60
+Metrics/PerceivedComplexity:
+  Max: 33
+
+# Offense count: 7
+# Configuration parameters: EnforcedStyle.
+# SupportedStyles: snake_case, camelCase
+Naming/MethodName:
+  Exclude:
+    - 'app/controllers/tag_controller.rb'
+    - 'app/models/doc_list.rb'
+    - 'app/models/search_request.rb'
+    - 'app/services/search_service.rb'
+
+# Offense count: 8
+# Configuration parameters: NamePrefix, NamePrefixBlacklist, NameWhitelist, MethodDefinitionMacros.
+# NamePrefix: is_, has_, have_
+# NamePrefixBlacklist: is_, has_, have_
+# NameWhitelist: is_a?
+# MethodDefinitionMacros: define_method, define_singleton_method
+Naming/PredicateName:
+  Exclude:
+    - 'spec/**/*'
+    - 'app/controllers/openid_controller.rb'
+    - 'app/models/drupal_file.rb'
+    - 'app/models/image.rb'
+    - 'app/models/node.rb'
+    - 'app/models/revision.rb'
+    - 'app/models/tag.rb'
+    - 'app/models/user.rb'
+
+# Offense count: 3
+# Configuration parameters: MinNameLength, AllowNamesEndingInNumbers, AllowedNames, ForbiddenNames.
+# AllowedNames: io, id, to, by, on, in, at, ip, db
+Naming/UncommunicativeMethodParamName:
+  Exclude:
+    - 'app/models/doc_list.rb'
+
+
+# Offense count: 9
+# Configuration parameters: EnforcedStyle.
+# SupportedStyles: snake_case, camelCase
+Naming/VariableName:
+  Exclude:
+    - 'app/models/concerns/node_shared.rb'
+    - 'app/models/doc_list.rb'
+    - 'app/models/revision.rb'
+    - 'app/models/search_request.rb'
+
+# Offense count: 2
+Security/Open:
+  Exclude:
+    - 'app/models/image.rb'
+    - 'app/models/node.rb'
+
+
+# Offense count: 26
+# Configuration parameters: MinBodyLength.
+Style/GuardClause:
+  Exclude:
+    - 'app/controllers/admin_controller.rb'
+    - 'app/controllers/application_controller.rb'
+    - 'app/controllers/features_controller.rb'
+    - 'app/controllers/notes_controller.rb'
+    - 'app/controllers/openid_controller.rb'
+    - 'app/controllers/users_controller.rb'
+    - 'app/helpers/application_helper.rb'
+    - 'app/helpers/comment_helper.rb'
+    - 'app/models/comment.rb'
+    - 'app/models/node.rb'
+    - 'app/models/spamaway.rb'
+    - 'app/models/user.rb'
+    - 'app/models/user_tag.rb'
+    - 'app/services/search_criteria.rb'
+
+# Offense count: 2
+Style/IdenticalConditionalBranches:
+  Exclude:
+    # - 'app/controllers/answers_controller.rb'
+
+# Offense count: 45
+# Cop supports --auto-correct.
+Style/IfUnlessModifier:
+  Enabled: false
+
+
+# Offense count: 1
+Style/MixinUsage:
+  Exclude:
+    - 'app/controllers/application_controller.rb'
+
+# Offense count: 16
+# Cop supports --auto-correct.
+# Configuration parameters: AutoCorrect, EnforcedStyle, IgnoredMethods.
+# SupportedStyles: predicate, comparison
+Style/NumericPredicate:
+  Exclude:
+    - 'spec/**/*'
+    - 'app/controllers/application_controller.rb'
+    - 'app/controllers/users_controller.rb'
+    - 'app/controllers/wiki_controller.rb'
+    - 'app/jobs/digest_mail_job.rb'
+    - 'app/models/comment.rb'
+    - 'app/models/concerns/statistics.rb'
+    - 'app/models/user.rb'