Allow providers to define a data schema for their channel parameters

app/models/channel.rb

@@ -2,28 +2,39 @@ class DiscourseChat::Channel < DiscourseChat::PluginModel
   KEY_PREFIX = 'channel:'
 
   # Setup ActiveRecord::Store to use the JSON field to read/write these values
-  store :value, accessors: [ :provider, :descriptor ], coder: JSON
+  store :value, accessors: [ :provider, :data ], coder: JSON
 
-  validate :provider_and_descriptor_valid?
+  after_initialize :init_data
 
-  def provider_and_descriptor_valid?
+  def init_data
+    self.data = {} if self.data.nil?
+  end
+
+  validate :provider_valid?, :data_valid?
+
+  def provider_valid?
     # Validate provider
     if not ::DiscourseChat::Provider.provider_names.include? provider
       errors.add(:provider, "#{provider} is not a valid provider")
       return
     end
+  end
 
-    # Validate descriptor
-    if descriptor.blank? 
-      errors.add(:descriptor, "channel descriptor cannot be blank")
+  def data_valid?
+    # If provider is invalid, don't try and check data
+    return unless ::DiscourseChat::Provider.provider_names.include? provider
+
+    params = ::DiscourseChat::Provider.get_by_name(provider)::CHANNEL_PARAMETERS
+
+    unless params.keys.sort == data.keys.sort
+      errors.add(:data, "data does not match the required structure for provider #{provider}")
       return
     end
 
-    provider_class = ::DiscourseChat::Provider.get_by_name(provider)
-    if defined? provider_class::PROVIDER_CHANNEL_REGEX
-      channel_regex = Regexp.new provider_class::PROVIDER_CHANNEL_REGEX
-      if not channel_regex.match?(descriptor)
-        errors.add(:descriptor, "#{descriptor} is not a valid channel descriptor for provider #{provider}")
+    data.each do |key, value|
+      regex_string = params[key]
+      if !Regexp.new(regex_string).match?(value)
+        errors.add(:data, "data.#{key} is invalid")
       end
     end
   end

lib/discourse_chat/provider/slack/slack_provider.rb

@@ -3,7 +3,7 @@ module DiscourseChat::Provider::SlackProvider
 
   PROVIDER_ENABLED_SETTING = :chat_integration_slack_enabled
 
-  PROVIDER_CHANNEL_REGEX = '^[@#]\S*$'
+  CHANNEL_PARAMETERS = {"channel" => '^[@#]\S*$'}
 
   def self.excerpt(post, max_length = SiteSetting.chat_integration_slack_excerpt_length)
     doc = Nokogiri::HTML.fragment(post.excerpt(max_length,

lib/discourse_chat/provider/telegram/telegram_provider.rb

@@ -1,10 +1,10 @@
 module DiscourseChat
   module Provider
     module TelegramProvider
-    	include Provider
-
       PROVIDER_NAME = "telegram".freeze
       PROVIDER_ENABLED_SETTING = :chat_integration_telegram_enabled
+      CHANNEL_PARAMETERS = {}
+
     end
   end
 end

spec/dummy_provider.rb

@@ -8,6 +8,8 @@ RSpec.shared_context "dummy provider" do
     module ::DiscourseChat::Provider::DummyProvider
       PROVIDER_NAME = "dummy".freeze
       PROVIDER_ENABLED_SETTING = :chat_integration_enabled # Tie to main plugin enabled setting
+      CHANNEL_PARAMETERS = {}
+
       @@sent_messages = []
       @@raise_exception = nil
 
@@ -30,9 +32,37 @@ RSpec.shared_context "dummy provider" do
   end
 
   let(:provider){::DiscourseChat::Provider::DummyProvider}
+end
 
+RSpec.shared_context "validated dummy provider" do
+  before(:each) do
+    if defined? ::DiscourseChat::Provider::Dummy2Provider
+      ::DiscourseChat::Provider.send(:remove_const, :Dummy2Provider)
+    end
+    
+    module ::DiscourseChat::Provider::Dummy2Provider
+      PROVIDER_NAME = "dummy2".freeze
+      PROVIDER_ENABLED_SETTING = :chat_integration_enabled # Tie to main plugin enabled setting
+      CHANNEL_PARAMETERS = {"val" => '\S+'}
+
+      @@sent_messages = []
+
+      def self.trigger_notification(post, channel)
+        @@sent_messages.push(post: post.id, channel: channel)
+      end
+
+      def self.sent_messages
+        @@sent_messages
+      end
+    end
+    
+  end
+
+  let(:provider){::DiscourseChat::Provider::DummyProvider}
 end
 
 RSpec.configure do |rspec|
   rspec.include_context "dummy provider"
+  rspec.include_context "validated dummy provider"
+
 end

spec/models/channel_spec.rb

@@ -3,6 +3,7 @@ require_relative '../dummy_provider'
 
 RSpec.describe DiscourseChat::Channel do
   include_context "dummy provider"
+  include_context "validated dummy provider"
 
 
   it 'should save and load successfully' do
@@ -10,7 +11,6 @@ RSpec.describe DiscourseChat::Channel do
 
     chan = DiscourseChat::Channel.create({
           provider:"dummy",
-          descriptor: "#random",
         })
 
     expect(DiscourseChat::Channel.all.length).to eq(1)
@@ -18,23 +18,22 @@ RSpec.describe DiscourseChat::Channel do
     loadedChan = DiscourseChat::Channel.find(chan.id)
 
     expect(loadedChan.provider).to eq('dummy')
-    expect(loadedChan.descriptor).to eq('#random')
     
   end
 
   it 'can be filtered by provider' do
-    channel1 = DiscourseChat::Channel.create({provider:'dummy', descriptor:'blah'})
-    channel2 = DiscourseChat::Channel.create({provider:'slack', descriptor:'#blah'})
-    channel3 = DiscourseChat::Channel.create({provider:'slack', descriptor:'#blah'})
+    channel1 = DiscourseChat::Channel.create!(provider:'dummy')
+    channel2 = DiscourseChat::Channel.create!(provider:'dummy2', data:{val:"blah"})
+    channel3 = DiscourseChat::Channel.create!(provider:'dummy2', data:{val:"blah"})
 
     expect(DiscourseChat::Channel.all.length).to eq(3)
 
-    expect(DiscourseChat::Channel.with_provider('slack').length).to eq(2)
+    expect(DiscourseChat::Channel.with_provider('dummy2').length).to eq(2)
     expect(DiscourseChat::Channel.with_provider('dummy').length).to eq(1)
   end
 
   it 'can find its own rules' do
-    channel = DiscourseChat::Channel.create({provider:'dummy', descriptor:'blah'})
+    channel = DiscourseChat::Channel.create({provider:'dummy'})
     expect(channel.rules.size).to eq(0)
     DiscourseChat::Rule.create(channel: channel)
     DiscourseChat::Rule.create(channel: channel)
@@ -43,21 +42,33 @@ RSpec.describe DiscourseChat::Channel do
   end
 
   describe 'validations' do
-    let(:channel) { DiscourseChat::Channel.create(
-        provider:"dummy",
-        descriptor: "#general"
-      ) }
+    let(:channel) {  }
 
     it 'validates provider correctly' do
+      channel = DiscourseChat::Channel.create!(provider:"dummy")
       expect(channel.valid?).to eq(true)
       channel.provider = 'somerandomprovider'
       expect(channel.valid?).to eq(false)
     end
 
-    it 'validates channel correctly' do
-      expect(channel.valid?).to eq(true)
-      channel.descriptor = ''
-      expect(channel.valid?).to eq(false)
+    it 'succeeds with valid data' do
+      channel2 = DiscourseChat::Channel.new(provider:"dummy2", data:{val:"hello"})
+      expect(channel2.valid?).to eq(true)
+    end
+
+    it 'disallows invalid data' do
+      channel2 = DiscourseChat::Channel.new(provider:"dummy2", data:{val:''})
+      expect(channel2.valid?).to eq(false)
+    end
+
+    it 'disallows unknown keys' do
+      channel2 = DiscourseChat::Channel.new(provider:"dummy2", data:{val:"hello", unknown:"world"})
+      expect(channel2.valid?).to eq(false)
+    end
+
+    it 'requires all keys' do
+      channel2 = DiscourseChat::Channel.new(provider:"dummy2", data:{})
+      expect(channel2.valid?).to eq(false)
     end
 
   end

spec/models/rule_spec.rb

@@ -7,7 +7,7 @@ RSpec.describe DiscourseChat::Rule do
   let(:tag1){Fabricate(:tag)}
   let(:tag2){Fabricate(:tag)}
 
-  let(:channel){DiscourseChat::Channel.create(provider:'dummy', descriptor:'#general')}
+  let(:channel){DiscourseChat::Channel.create(provider:'dummy')}
 
   describe '.alloc_key' do
     it 'should return sequential numbers' do 
@@ -87,8 +87,8 @@ RSpec.describe DiscourseChat::Rule do
     end
 
     it 'can be filtered by channel' do
-      channel2 = DiscourseChat::Channel.create(provider:'dummy', descriptor:'#random')
-      channel3 = DiscourseChat::Channel.create(provider:'dummy', descriptor:'#another')
+      channel2 = DiscourseChat::Channel.create(provider:'dummy')
+      channel3 = DiscourseChat::Channel.create(provider:'dummy')
 
       rule2 = DiscourseChat::Rule.create(channel:channel)
       rule3 = DiscourseChat::Rule.create(channel:channel)