[WIP] Column search

[mklein994]

Add search inputs for each column header.

Things to do before merging

• [ ] Implement in GtCustomComponentFactory
• [x] Move column search demo module to ~src/app/demos/~ src/app/examples/search/
• [ ] Make styling more consistent with the rest of the app
• [x] Filter rows by each column's search box (if enabled)
• [ ] Highlight search matches
• [ ] Handle (keyup) event asynchronously (maybe?)
• [x] Ability to show only null values mklein994/angular-generic-table#1
• [ ] Search by types other than string mklein994/angular-generic-table#2
• [ ] Split search terms like how it's done in global search
  • For example: searching for smith brian under a 'name' field, where first and last names are joined with a space, should find "Brian Smith" if it exists. If the query is wrapped in double quotes, it's counted as one word, so a search "smith brian" would not find "Brian Smith".
  • TODO: what about case sensitivity?

Closes #99

[mklein994]

~~I've labeled commits that shouldn't be merged into master with DO NOT MERGE:, to make them easier to find later. These include things like changing travis' build scripts to be specific to this PR, and other minor things. When this PR is ready, I'll rebase those out.~~

EDIT: I've cleaned it up to remove those commits. This makes the PR represent more closely what would happen if it were to be merged.

[mklein994]

For some reason, I can't seem to get it to work on angular 4, but if I upgrade to angular 5 it works. ng-packgr is failing silently when running npm run build:core.

I'm going to clean this branch up so that others can contribute to it more easily. (That way I can rebase only when master get's updated).

[hjalmers]

Hi @mklein994 nice work, I'm also in the middle of refactoring the examples and how they are generated as that's one of the main things that have prevented me from bumping the code to angular 5, once I'm done with that it should be easier for others to contribute I hope. I haven't done anything changes to the lib so it should be pretty easy to merge, feel free to check it out if you like: https://github.com/hjalmers/angular-generic-table/tree/feat/angular-5-update

I've just added one example using the new "format" which is available under '/demo/basic'.

[mklein994]

@hjalmers I left a comment over here about some of those updates.

[mklein994]

I rebased onto master, updating each commit to match the new style.

[mklein994]

Rebase onto master (cypress tests).

[mklein994]

@hjalmers OK: so ~this works~... when the table is small. I took your advice wrote it using pipes, because that seemed to be the simplest option to extend it. Everything is performed synchronously, so when I enabled searchBox for some fields in the advanced demo, performance was taking a big hit, as you predicted. (It was also failing because I haven't implemented the search or value transformations yet).

If I were to re-implement this using observables and triggering it asynchronously, what would need to be updated?

Edit:

Scratch that: it doesn't work 😕. I'm going to keep working on it, but the filter is duplicating items, and not filtering when it should. I'm still curious about how to implement this as an observable.

[hjalmers]

Yeah, I first wrote the search function for AngularJs which had a lot of issues with performance due to two-way binding so I tried to minimize the amount of operations performed and just trigger one change and it becomes even trickier when involving multiple columns. I think a lot of the code from the global search could be reused however, but instead of merging all the columns into one string, it could go through the data one column at a time and only go through columns that are included in the search "object". The next iteration should only have to go through the rows that pass the first column check and so on, it shouldn't have to have have that big impact on performance.

It would be a lot nicer to use observables however but I think it would be hard to use observables just for this with out rewriting the other pipes too, I think it would be better to start from scratch and think about the flow which should be something like this:

1. filter
2. global search
3. column search (might be performed at the same time as global search)
4. sort
5. chunk

Perhaps starting out with a separate component that uses the same configuration and just re-add one feature at a time and use observables for everything.

I thought I'd try and draw a sketch of the flow using draw.io or something just to make the architecture clearer but that will have to wait a while I'm afraid as I'm going away on a holiday soon and won't be back until mid may. But if you have any suggestions feel free to share them, I'm might not be able to commit any code for a while but I should be able to check my mail from time to time and merge minor pull requests.

[mklein994]

OK thanks for the heads-up.