FEATURE: add min_trust_level_to_edit_post

add minimum trust level to edit post (default 0)

config/locales/server.en.yml

@@ -1129,6 +1129,8 @@ en:
 
     min_trust_to_edit_wiki_post: "The minimum trust level required to edit post marked as wiki."
 
+    min_trust_to_edit_post: "The minimum trust level required to edit posts."
+
     min_trust_to_allow_self_wiki: "The minimum trust level required to make user's own post wiki."
 
     min_trust_to_send_messages: "The minimum trust level required to create new private messages."

config/site_settings.yml

@@ -762,6 +762,9 @@ trust:
   min_trust_to_edit_wiki_post:
     default: 1
     enum: 'TrustLevelSetting'
+  min_trust_to_edit_post:
+    default: 0
+    enum: 'TrustLevelSetting'
   min_trust_to_allow_self_wiki:
     default: 3
     enum: 'TrustLevelSetting'

lib/guardian/post_guardian.rb

@@ -103,6 +103,10 @@ module PostGuardian
       return true
     end
 
+    if @user.trust_level < SiteSetting.min_trust_to_edit_post
+      return false
+    end
+
     if is_my_own?(post)
       if post.hidden?
         return false if post.hidden_at.present? &&

spec/components/guardian_spec.rb

@@ -972,6 +972,20 @@ describe Guardian do
         expect(Guardian.new(trust_level_4).can_edit?(post)).to be_truthy
       end
 
+      it 'returns false when trying to edit a post with no trust' do
+        SiteSetting.min_trust_to_edit_post = 2
+        post.user.trust_level = 1
+
+        expect(Guardian.new(post.user).can_edit?(post)).to be_falsey
+      end
+
+      it 'returns true when trying to edit a post with trust' do
+        SiteSetting.min_trust_to_edit_post = 1
+        post.user.trust_level = 1
+
+        expect(Guardian.new(post.user).can_edit?(post)).to be_truthy
+      end
+
       it 'returns false when another user has too low trust level to edit wiki post' do
         SiteSetting.stubs(:min_trust_to_edit_wiki_post).returns(2)
         post.wiki = true