pocket_modify kind of always returns true

[pr130]

the pocket API kind of always returns "success" for pocket_modify actions.
For example, even if the item id does not exist, the returned list looks like this:

{
    "action_results": [
        true
    ],
    "action_errors": [
        null
    ],
    "status": 1
}

Other weird behaviour is not known but could exist (do further probing?)

Options are:

• put a warning in the docs for all functions that work through modify.
• pre-check: before running the code, fetch pockets and evaluate whether the query could succeed.
• after-check: check whether the target state has been achieved.

[pr130]

what do you think?

[yannikbuhl]

There is another weird behaviour. When you are doing the pocket_add() with multiple links (or only with one, it doesn't matter), it only works if you put an http://www in front of your link. But if you don't, no error message is returned by the HTTP request.

Possible solution: Check if string of URL starts with http:// or https:// and add it otherwise. Dipslay warning, too.

[yannikbuhl]

Fixed problem for pocket_add() by adding a helper function that compares the URLs desired for adding with the list of URLs in the Pocket and prompts a warning if some of them have not been added.