# frozen_string_literal: true

# Redmine - project management software
# Copyright (C) 2006-  Jean-Philippe Lang
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License
# as published by the Free Software Foundation; either version 2
# of the License, or (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.

module AvatarsHelper
  include GravatarHelper::PublicMethods

  def assignee_avatar(user, options={})
    return '' unless user

    options[:title] = l(:field_assigned_to) + ": " + user.name
    avatar(user, options).to_s.html_safe
  end

  def author_avatar(user, options={})
    return '' unless user

    options[:title] = l(:field_author) + ": " + user.name
    avatar(user, options).to_s.html_safe
  end

  # Returns the full URL of the avatar image of +user+ for the API, or nil
  def avatar_image_url(user)
    if local_avatar?(user)
      user_avatar_url(user, user.avatar_key)
    elsif user.mail && Setting.gravatar_enabled?
      gravatar_url(user.mail, {rating: nil, size: nil, default: Setting.gravatar_default})
    end
  end

  # Returns the avatar image tag for the given +user+ if avatars are enabled
  # +user+ can be a User or a string that will be scanned for an email address (eg. 'joe <joe@foo.bar>')
  def avatar(user, options = {})
    # "avatar" class should be added to all avatars
    options[:class] = ['avatar', options[:class]].compact.join(' ')
    # Add the status of the user as a class (e.g. "active", "locked")
    options[:class] += " #{User::LABEL_BY_STATUS[user.status]}" if user.is_a?(User)

    if user.is_a?(AnonymousUser)
      anonymous_avatar(options)
    elsif user.is_a?(Group)
      group_avatar(options)
    elsif local_avatar?(user)
      local_avatar_tag(user, options)
    elsif Setting.gravatar_enabled?
      gravatar_avatar_tag(user, options)
    elsif user.respond_to?(:initials)
      initials_avatar_tag(user, options)
    else
      ''
    end
  end

  # Returns true if the avatar set in Redmine is displayed for +user+
  def local_avatar?(user)
    user.is_a?(User) && user.avatar_id && User.avatar_available?
  end

  # Returns the path to the page to change the avatar of +user+, or nil if
  # the current user cannot change it
  def avatar_edit_path(user)
    if user == User.current
      my_avatar_path
    elsif User.current.admin? && user.logged?
      edit_user_avatar_path(user)
    end
  end

  # Returns the avatar of +user+ linked to the page to change it if the
  # current user can change it
  def avatar_edit_link(user, options={})
    if (path = avatar_edit_path(user))
      link_to avatar(user, {:title => l(:button_change_avatar)}.merge(options)), path
    else
      avatar(user, options)
    end
  end

  # Returns a text that explains where the avatar of +user+ comes from
  def avatar_source_info(user)
    return l(:text_avatar_uploaded) if local_avatar?(user)

    source =
      if Setting.gravatar_enabled?
        t(:text_avatar_from_server_html, :url => Redmine::Configuration['avatar_server_url'])
      else
        l(:text_avatar_initials)
      end
    upload = User.avatar_available? ? l(:text_avatar_upload_instead) : l(:text_avatar_upload_disabled)
    safe_join([source, upload], ' ')
  end

  def anonymous_avatar(options={})
    options[:class] = ['anonymous-avatar', options[:class]].compact.join(' ')
    image_tag 'anonymous.png', GravatarHelper::DEFAULT_OPTIONS.except(:default, :rating, :ssl).merge(options)
  end

  def group_avatar(options={})
    options[:class] = ['group-avatar', options[:class]].compact.join(' ')
    image_tag 'group.svg', GravatarHelper::DEFAULT_OPTIONS.except(:default, :rating, :ssl).merge(options)
  end

  private

  def local_avatar_tag(user, options)
    size = (options.delete(:size) || GravatarHelper::DEFAULT_OPTIONS[:size]).to_i
    options[:title] ||= user.name
    options[:srcset] = "#{user_avatar_path(user, user.avatar_key, :size => size * 2)} 2x"
    image_tag(
      user_avatar_path(user, user.avatar_key, :size => size),
      GravatarHelper::DEFAULT_OPTIONS.slice(:alt).merge(options).merge(:width => size, :height => size))
  end

  def gravatar_avatar_tag(user, options)
    options[:default] = Setting.gravatar_default
    options[:class] = [GravatarHelper::DEFAULT_OPTIONS[:class], options[:class]].compact.join(' ')

    email = extract_email_from_user(user)

    if user.respond_to?(:mail)
      options[:title] ||= user.name
      options[:initials] = user.initials if options[:default] == "initials" && user.initials.present?
    end

    if email.present?
      gravatar(email.to_s.downcase, options) rescue nil
    end
  end

  def initials_avatar_tag(user, options)
    size = (options.delete(:size) || GravatarHelper::DEFAULT_OPTIONS[:size]).to_i

    css_class = ["avatar-color-#{user.id % 8}", "s#{size}", options[:class]].compact.join(' ')

    content_tag('span', user.initials, role: 'img', class: css_class, title: options[:title])
  end

  def extract_email_from_user(user)
    if user.respond_to?(:mail)
      user.mail
    elsif user.to_s =~ %r{<(.+?)>}
      $1
    end
  end
end