FIX: Discourse automation reports with parameters (#363)

When setting up an automation to create a DM or a post with a report on a recurring basis, and using a Data Explorer query that has parameters, we encounter an error.

The `.params_to_hash` method currently expects an array of arrays for the parameters, but in reality they seem to be arrays of hashes.

This change makes `.params_to_hash` work with arrays of hashes. It also preserves the ability to work with nested arrays in case this is used somewhere else.

lib/discourse_data_explorer/report_generator.rb

@@ -35,26 +35,10 @@ module ::DiscourseDataExplorer
       build_report_post(query, table, attach_csv: opts[:attach_csv], result:)
     end
 
-    private
-
     def self.params_to_hash(query_params)
       params = JSON.parse(query_params)
-      params_hash = {}
 
-      if !params.blank?
-        param_key, param_value = [], []
-        params.flatten.each.with_index do |data, i|
-          if i % 2 == 0
-            param_key << data
-          else
-            param_value << data
-          end
-        end
-
-        params_hash = Hash[param_key.zip(param_value)]
-      end
-
-      params_hash
+      params.map { |p| p.is_a?(Hash) ? [p["key"], p["value"]] : p }.to_h
     end
 
     def self.build_report_pms(query, table = "", targets = [], attach_csv: false, result: nil)

spec/report_generator_spec.rb

@@ -253,4 +253,24 @@ describe DiscourseDataExplorer::ReportGenerator do
       )
     end
   end
+
+  describe ".params_to_hash" do
+    context "when passing nothing" do
+      let(:query_params) { "[]" }
+
+      it { expect(described_class.params_to_hash(query_params)).to eq({}) }
+    end
+
+    context "when passing an array of arrays" do
+      let(:query_params) { '[["foo", 1], ["bar", 2]]' }
+
+      it { expect(described_class.params_to_hash(query_params)).to eq({ "foo" => 1, "bar" => 2 }) }
+    end
+
+    context "when passing an array of hashes" do
+      let(:query_params) { '[{ "key": "foo", "value": 1 }, { "key": "bar", "value": 2 }]' }
+
+      it { expect(described_class.params_to_hash(query_params)).to eq({ "foo" => 1, "bar" => 2 }) }
+    end
+  end
 end