data hierarchy

[hamedpro]

think well about a tool or something making it easier to make sure everywhere that its required to consider parents or children of something they are considered. for example we want to show time line of a pack. do we need to show timelines of its children recursively ? even if we put an option to handle this particular situation there will also other places we face this decision.

[hamedpro]

add a new getter to cache_item s : children (number[]). in these situations we say something is a child of another thing :

• a message is a child of what it belongs to.
• a unit is children of its parent pack.

[hamedpro]

parts we need to make sure about them :

• showing changes of children recursively in timeline of a parent
• showing messages of children and so on inside the parent's messages
• when navigating back in a Thing (back button takes you to its parent not home)
• maybe there be other parts