Module: Cachai

Defined in:
lib/cachai.rb,
lib/models.rb

Defined Under Namespace

Classes: Admin, Middleware, Post, Response

Constant Summary collapse

CACHE_MINUTES =

10 minutes

10 * 60

Class Method Summary collapse

Class Method Details

.boot(domain, redis_host = 'localhost') ⇒ Object 



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# File 'lib/models.rb', line 12

def self.boot(domain, redis_host = 'localhost')
  self.domain = domain
  self.cache = Redis.new(:host => redis_host)
  self.load_db!
end

.cache ⇒ Object 



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# File 'lib/models.rb', line 50

def self.cache
  @cache
end

.cache=(obj) ⇒ Object 



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# File 'lib/models.rb', line 46

def self.cache=(obj)
  @cache = obj
end

.clear_cache(path) ⇒ Object 



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# File 'lib/models.rb', line 54

def self.clear_cache(path)
  cache.del(key_for(path))
end

.domain ⇒ Object 



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# File 'lib/models.rb', line 42

def self.domain
  @domain
end

.domain=(value) ⇒ Object 



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# File 'lib/models.rb', line 38

def self.domain=(value)
  @domain = value
end

.get_and_sort_comments_for(post) ⇒ Object 



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# File 'lib/models.rb', line 82

def self.get_and_sort_comments_for(post)
  result = []
  top_level = post.responses.comment.approved.top_level
  nested    = post.responses.comment.approved.nested

  top_level.each_with_index do |comment, i|
    obj = comment.as_json
    children = nested.select do |nested|
      nested.parent_id == comment.id
    end
    obj.merge!(:children => children) if children.any?
    result.push(obj)
  end

  result
end

.get_comments_for(path, nocache = false) ⇒ Object 



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# File 'lib/models.rb', line 63

def self.get_comments_for(path, nocache = false)
  key = key_for(path)

  unless !nocache && json_list = cache.get(key)
    # puts "Not cached. Getting from DB: #{path}"

    if post = Post.find_by_path(path)
      json_list = get_and_sort_comments_for(post).to_json
    else
      json_list = '[]'
    end

    cache.set(key, json_list)
    cache.expire(key, CACHE_MINUTES)
  end

  json_list
end

.key_for(path) ⇒ Object 



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# File 'lib/models.rb', line 58

def self.key_for(path)
  raise "Domain not set!" unless domain
  "comments:#{domain}:#{path}"
end

.load_db! ⇒ Object 



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# File 'lib/models.rb', line 18

def self.load_db!
  load_schema unless schema_loaded?
end

.load_schema ⇒ Object 



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# File 'lib/models.rb', line 22

def self.load_schema
  require_relative '../db/schema.rb'
end

.schema_loaded? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/models.rb', line 26

def self.schema_loaded?
  Post.first
  true
rescue ActiveRecord::StatementInvalid => e
  # SQLite3::SQLException => e
  # return !e.message['no such table']
  false
rescue ActiveRecord::ConnectionNotEstablished
  puts "Connection not established."
  false
end