fix: Funnel step names cannot contain spaces

Fixes #359

Author: paveltiunov

packages/cubejs-schema-compiler/extensions/Funnels.js

@@ -99,11 +99,15 @@ ${eventJoin.join("\nLEFT JOIN\n")}
   }
 
   eventsTableName(step) {
-    return `${inflection.underscore(step.name)}_events`;
+    return `${this.inflect(step)}_events`;
   }
 
   stepUserIdColumnName(step) {
-    return `${inflection.underscore(step.name)}_user_id`;
+    return `${this.inflect(step)}_user_id`;
+  }
+
+  inflect(step) {
+    return inflection.underscore(inflection.camelize(step.name.replace(/[^A-Za-z0-9]+/g, '_')));
   }
 
   stepSegmentSelect(funnelDefinition, step) {

packages/cubejs-schema-compiler/scaffolding/ScaffoldingTemplate.js

@@ -92,7 +92,7 @@ class ScaffoldingTemplate {
   }
 
   memberName(member) {
-    return inflection.camelize(member.title.replace(/\s+|\./g, '_').toLowerCase(), true);
+    return inflection.camelize(member.title.replace(/[^A-Za-z0-9]+/g, '_').toLowerCase(), true);
   }
 
   renderFile(fileDescriptor) {

packages/cubejs-schema-compiler/test/ExtensionsTest.js

@@ -23,13 +23,13 @@ describe('Extensions', () => {
         },
         steps: [
           {
-            name: 'application_installed',
+            name: 'Application Installed',
             eventsTable: {
               sql: 'application_installed'
             }
           },
           {
-            name: 'application_opened',
+            name: 'ApplicationOpened',
             eventsView: {
               sql: 'application_opened'
             },
@@ -79,6 +79,10 @@ describe('Extensions', () => {
       });
 
       console.log(query.buildSqlAndParams()[0]);
+
+      query.buildSqlAndParams()[0].should.match(/application_installed_events/);
+      query.buildSqlAndParams()[0].should.match(/application_opened_events/);
+      query.buildSqlAndParams()[0].should.match(/user_training_finish_first_events/);
     });
 
     return result;