Catholic interpretation of Revelation by John? Does the Catholic Church have the book of Revelation all fleshed out or do they teach it's sealed? 

I'm aware of some elements, like the woman, for example, being Mary. If everything is fleshed out, then could someone point me to a good resource or briefly summarize its views?
The best, most detailed Catholic commentary on St. John's Apocalypse is


The Book of Destiny (1956) by Fr. Herman Kramer.


cf. the briefer, older commentary: The Apocalypse of St. John (1921) by Fr. E. Sylvester Berry

Commenting on Apoc. 12:1 ("woman clothed with the sun"… etc.), Fr. Kramer writes:


  The woman of chapter twelve is not the Blessed Virgin Mary.
  
  […]
  
  According to the ancient Fathers, the human nature or character of the Church is here delineated, while in chapters four and five her divine nature and prerogatives were depicted.
  
  […]
  
  The twelve stars represent the twelve apostles; or they may be God's mystical number symbolizing the Christian nations, that as a contrast to the ten crowned horns of the beast, shall be the glory of the Church when the days of Antichrist approach.
  
  […]
  
  The moon under her feet has ever been understood to symbolize the unchanging and unchangeable character of the Church.


cf. these excerpts of his commentary on Apoc. 12

Also, St. John's Apocalypse contains a detailed description of the Catholic Mass.