Basic iCal generator working

schedules_api/app/controllers/application_controller.rb

 # Configures the application.
 class ApplicationController < ActionController::Base
-  protect_from_forgery with: :exception
+  protect_from_forgery with: :null_session
 end

schedules_api/app/controllers/calendar_generator_controller.rb

+require 'icalendar'
+require 'time'
+
 class CalendarGeneratorController < ApplicationController
-  def generate; end
+  def generate
+    cal = Icalendar::Calendar.new
+    posted_sections = JSON.parse(request.body.read)
+
+    posted_sections.each do |posted_section|
+      section = Section.find_by_crn posted_section["crn"]
+      event = generate_event_from_section(section)
+      cal.add_event(event)
+    end
+
+    puts cal.to_ical
+
+    render plain: cal.to_ical
+  end
+
+  private
+
+  def generate_event_from_section(section)
+    event = Icalendar::Event.new
+
+    event.summary = section.name
+    event.description = section.title
+    event.dtstart = Icalendar::Values::DateTime.new(formatted_datetime_str(section.start_date, section.start_time))
+    event.dtend = Icalendar::Values::DateTime.new(formatted_datetime_str(section.start_date, section.end_time))
+    event.rrule = Icalendar::Values::Recur.new(recur_str(section))
+
+    event
+  end
+
+  def formatted_datetime_str(date, time)
+    formatted_date = date.to_s.tr('-', '')
+    formatted_time = Time.parse(time).strftime("%H%M%S")
+    
+    "#{formatted_date}T#{formatted_time}"
+  end
+
+  DAYS = {
+    "M" => "MO",
+    "T" => "TU",
+    "W" => "WE",
+    "R" => "TH",
+    "F" => "FR",
+    "S" => "SA",
+    "U" => "SU"
+  }.freeze
+
+  def recur_str(section)
+    days = section.days.split("").map do |day|
+      DAYS[day]
+    end
+
+    "FREQ=WEEKLY;UNTIL=#{formatted_datetime_str(section.end_date, section.end_time)};BYDAY=#{days.join(',')}"
+  end
 end

schedules_api/config/routes.rb

@@ -6,7 +6,7 @@ Rails.application.routes.draw do
     end
 
     get 'search', controller: 'search', action: 'index'
-    get 'generate', controller: 'calendar_generator', action: 'generate'
+    post 'generate', controller: 'calendar_generator', action: 'generate'
   end
 
   root 'courses#index' # Set the root to be the courses API endpoint

schedules_web/src/components/App.tsx

@@ -13,6 +13,7 @@ class App extends React.Component<any, State> {
         this.state = { currentSchedule: [] };
 
         this.addSectionToCurrentScheduleIfUnique = this.addSectionToCurrentScheduleIfUnique.bind(this);
+        this.generateSchedule = this.generateSchedule.bind(this);
     }
 
     addSectionToCurrentScheduleIfUnique(section: Section) {
@@ -23,12 +24,25 @@ class App extends React.Component<any, State> {
         }
     }
 
+    generateSchedule() {
+        fetch('http://localhost:3000/api/generate', {
+            method: 'POST',
+            body: JSON.stringify(this.state.currentSchedule),
+            headers: {
+                'Content-Type': 'text/plain',
+            },
+        })
+            .then(response => response.text())
+            .then(text => console.log(text));
+    }
+
     render() {
         return (
             <div>
                 <h1>Schedules</h1>
                 <Search addSearchResultCallback={this.addSectionToCurrentScheduleIfUnique} />
                 <SectionList sections={this.state.currentSchedule} />
+                <button onClick={this.generateSchedule}>Generate Schedule</button>
             </div>
         );
     }

schedules_web/src/components/SectionList.tsx

@@ -13,6 +13,7 @@ export default class SectionList extends React.Component<Props, any> {
         this.renderSelectSectionColumn = this.renderSelectSectionColumn.bind(this);
         this.getSectionWithCRN = this.getSectionWithCRN.bind(this);
     }
+
     render() {
         return (
             <table>