class Scraper

# File lib/socrates_scraper/scraper.rb, line 6
def initialize(email, password)
        @email = email
        @password = password

        @agent = Mechanize.new
end

# File lib/socrates_scraper/scraper.rb, line 13
def get_user_profiles
        cohort_page = get_cohort_page
        user_links = get_user_links(cohort_page)

        raise "Invalid username or password" if user_links.empty?

        puts "Getting user profiles..."
        create_user_profiles(user_links)
end

# File lib/socrates_scraper/scraper.rb, line 69
def convert_html_to_person_hash(html)
        person = {}
        person[:name] = get_name(html)
        person[:image] = get_image(html)
        person[:facebook_id] = get_facebook_id(html)
        person
end

# File lib/socrates_scraper/scraper.rb, line 48
def create_user_profiles(user_links)
        user_links.map do |link|
                # reset to cohort page after every user
                @agent.transact do
                        user_html = extract_profile_html(link)
                        convert_html_to_person_hash(user_html)
                end
        end
end

# File lib/socrates_scraper/scraper.rb, line 58
def extract_profile_html(link)
        page = @agent.click(link)

        # get the socrates id and convert into an
        # easily identifiable html element
        socrates_id = link.href[/.*\/(\d*)/, 1]
        socrates_tag = "<p class='soc_id'>#{socrates_id}</p>"

        Nokogiri::HTML(page.search('div.profile').to_s << socrates_tag)
end

# File lib/socrates_scraper/scraper.rb, line 25
def get_cohort_page
        @agent.get(URL)
        login
        @agent.get("https://socrates.devbootcamp.com/cohorts/78")
end

# File lib/socrates_scraper/scraper.rb, line 85
def get_facebook_id(html)
        html.css('dd')[4].text[/.*\/(.*)/, 1]
end

# File lib/socrates_scraper/scraper.rb, line 81
def get_image(html)
        html.css('.user > img').first['src']
end

# File lib/socrates_scraper/scraper.rb, line 77
def get_name(html)
        html.css('h1 > text()').first.text.lstrip.rstrip
end

# File lib/socrates_scraper/scraper.rb, line 38
def get_user_links(page)
        users = page.links_with(href: /users/)

        # remove top link 'My Profile'
        users.shift

        # deduplicate links (photo link + text link)
        users.uniq { |link| link.href }
end

# File lib/socrates_scraper/scraper.rb, line 31
def login
        form = @agent.page.forms.first
        form.email = @email
        form.password = @password
        form.submit
end