Pass the context along to all the extension methods

[Whoaa512]

Addresses #1343

With this change you should now be able to implement an extension like so:

class MyErrorTrackingExtension extends GraphQLExtension {
    willSendResponse(o) {
        const { context, graphqlResponse } = o

        context.trackErrors(graphqlResponse.errors)

        return o
    }
}

TODO:

• Update CHANGELOG.md with your change (include reference to issue & this PR)
• Make sure all of the significant new logic is covered by tests
• Rebase your changes on master so that they can be merged easily
• Make sure all tests and linter rules pass

Edit by @evans :
fixes #1343
fixes #614 as the request object can be taken from context or from requestDidStart
fixes #631 ""

[apollo-cla]

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[seromenho]

Seems that this addresses also: (they are similar and possible duplicates)
#614
#631

[zionts]

I'm for this change. I think we need to make a decision going forward whether we want to be opinionated about what information goes in the context or specify the things that should go into these functions separately. For example, this would include information about client awareness and extensions to the query.

[evans]

@Whoaa512 Thank you so much for the PR!

[martijnwalraven]

I think there may be an alternative where context is an instance property, similar to how we do this for data sources. But let's revisit this when we finalize the API with the new request pipeline.

[cliedeman]

Thanks a lot for this change, I am using to try some tracing integration and its working well so far.

Is there any reason the context object was not added to the parsingDidStart and validationDidStart methods?

[Whoaa512]

@cliedeman I think it might have just been on oversight on my part. Feel free to add another PR if your needs require it.

[cliedeman]

Thanks, PR #1653 Created

[ebenoist]

This is great and will fix issues I'm having with using sentry! Whats the normal release cadence for these things?

[alexbjorlig]

Can anyone provide a small example of how to use this? I have not used extensions before - where do you provide them?

[Whoaa512]

@dauledk @maimike I wrote a small example of how to use this here: #1681 (comment)

[twelve17]

@seromenho could you shed some insight as to how this issue addresses #614 ? I'm not seeing how to access the context from the formatError function.

[seromenho]

@twelve17 It doesn't expose the context to formatError but instead It does expose it to all extension methods.
Looking at this again and actually it doesn't address #614 directly, I think it is kinda of a workaround. You implement an extension get the errors and the context and do something with them.