Tersus: Stage 5 - Public Tweets

Stage 5 - Public TweetsDate: Feb 12, 2014Tags:XML

Zoom into <Mobile View>/Top Trends/Content, right click List, and select Copy.

Zoom into <Mobile View>/Public Tweets/Content, right click, and select Paste (Reuse) (we are reusing the list of tweets from the Top Trends page).

Zoom back to Public Tweets and add an action Init.

Model Init:

Right click and select Add Ancestor Reference -> Public Tweets.
Add a service Get Public Tweets and add to it a repetitive exit.
Create a flow from the repetitive exit of Get Public Tweets to Public Tweets/Content/List/Twit.
Init now looks like this:
Model Get Public Tweets:
- Add a Text constant Public Tweets URL with the value http://twitter.com/statuses/public_timeline.atom.
- Copy Download URL (from the "Twitter/Top Trends/Get Top Trends" package in the Repository Explorer, or from <Mobile View>/Top Trends/Init/Get Top Trends). Remember to use Copy (Reuse).
- Create a flow from the constant to the trigger of Download URL.
- Add Parse XML (from the Miscellaneous section of the palette).
- Create a flow from the exit of Download URL to the <XML Document> trigger of Parse XML.
- Create the data structure of the public tweets XML file:
  - Save the XML file http://twitter.com/statuses/public_timeline.atom to your computer (you can do it through your browser).
  - In the Repository Explorer, click the package "Twitter/Public Tweets/Get Public Tweets", as in the following screenshot:
  - Select File --> Import... --> Import XML Data Structure By Example.
  - Click Next.
  - Click Browse... and select the XML file you have just saved.
  - Click Finish.
  - Your Repository Exploree should look similar to this:
- From the Repository Explorer, still in the package "Twitter/Public Tweets/Get Public Tweets", drag the feed model into the Get Public Tweets Service.
- Create a flow from the <Parsed Tree> exit of Parse XML to the feed data structure.
- Add a repetitive action Convert to Content Item with a trigger and an exit. Create a flow from the exit of Parse XML to the trigger of Convert to Content Item, and another flow from the exit of Convert to Content Item to the repetitive exit of Get Public Tweets:
- Model Convert to Content Item:
  - Right click the trigger of Convert to Content Item and select Show in Repository. From the Repository Explorer drag the entry data structure. Create a flow from the trigger of the action to the entry data structure you have just added.
  - Similarly, right click the exit of Convert to Content Item and select Show in Repository. From the Repository Explorer drag the Twit data structure. Create a flow from Twit to the exit of the action.
  - Create flows from the fields of entry to the fields of Twit:
    - A flow from entry/author/name to Twit/Title/<Value>.
    - A flow from entry/content/(Content) to Twit/Details/<Value>.
  - Add an action Get Image URL to extract the user image of each tweet (when the link's type starts with "image"):
    - Add to Get Image URL a trigger and an exit.
    - Create a flow from entry/link to the trigger of Get Image URL.
    - Create a flow from the exit of Get Image URL to Twit/Thumbnail/<SRC>:
  - Model Get Image URL:
    - Zoom into Get Image URL.
    - Right click the trigger, select Show in Repository, and drag from the repositiry the link data structure.
    - Create a text constant "image".
    - Add from the palette Start With and Conditional Flow.
    - Add flows to complete the modeling of Get Image URL like this:

Save the model and restart the application (

): Online demo no longer working due to an API change of Twitter

Download Model: Stage 5 (version 2.1.9)See Also:

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