Demonstrate base approaches to work with kotlin flows. Get familiar with some flow's operators and how to use them in coroutine context.
Let's imagine that we need to implement online cinema. It provides access to a lot of video content and other data, which are related to the content. Asset - is the base abstract entity, which represents a content. It can have three Type's - VOD (video on demand), LIVE (streams) and CREW (people, who participate in movie making process). So, for example, user can find a movie, see small description, take a look on cast and crew and so on.
Your task is to implement search engine, which should work with user's input and understand how and where content should be searched. Engine MUST be able to:
- parse user's input and transform it to the search [Query]
- search mechanism should ignore a letter's case
- by default, matches should be found with contains method.
- recognize special character in the text and modifies search approach:
- ? - indicate the type of content the user is looking for. Could be placed ONLY at the end of the text. For example: Thor 3?VOD.
- @ - changes the approach to finding matches to startWith. Could be placed ONLY on the beginning of the text. For example: assets -> [Al Pacino, Pacman], query -> @pac. Only [Pacman] should be found.
- depending on the request, the mechanism must search among all content or according to the type specified in the request
- when user entered empty or blank string, search shouldn't start and error message should be thrown.
- program should work and make requests to the [SearchEngine] until user types "exit" (in any case)
- when program is started, user should see a greetings message
- when program is started, user should see a tip "how to exit program"
- when program is completed, user should see a farewell message
In the end, the program should look like :
