#fb chatbot auto reply function
## Feature
### Admin Can...

* List pages under his management
* List recently posts for certain page
* Setup some post reply rules/templates for certain post
  * rules can be either wildcard or keywords 
* Setup some private message reply rules/content for certain page
  * rules can be either wildcard or keywords
* CRUD all post reply rules
* CRUD all post reply templates
* CRUD all private message reply rules/content


### System will...

* Auto reply post under certain post
* Auto reply private message for certain page
* Save all post content
* Save all post replies
* Save all private message


##Model 
### Admin
```
has_many :page_managerships
has_many :pages, through: :page_managerships
```

### PageManagership
```
belongs_to :admin
belongs_to :page
```

* admin_id
* page_id

### Page
```
has_many :page_ownerships
has_many :admins, through: :page_managerships
has_many :posts
has_many :pm_reply_rules, class: MessageReplyRule

.auto_reply_post(user_input)
.auto_reply_pm(user_input)
```

* facebook_id
* name
* access_token

### MessageReplyRule
```
belongs_to :page
```

* page_id
* match_type, [wildcard, keywords]
* keywords
* reply\_template\_ids
* published_at

### MessageReplyTemplate
```
belongs_to :page
```

* page_id
* content, text


### Post
```
belongs_to :page
has_many :reply_rules, class: PostReplyRule
```

* page_id
* facebook_id

### PostReplyRule
```
belongs_to :post
has_one :template
```

* post_id
* match_type, [wildcard, keywords]
* keywords
* reply\_template\_ids
* published_at

### PostReplyTemplate
```
belongs_to :page
```

* page_id
* content, text

### ReplyHistory
```
belongs_to :page
```

* page_id
* post_id
* sender\_facebook\_id
* receipt\_facebook\_id
* reply_type
* reply\_rule\_id
* reply\_template\_id