[buddypress-trac] [BuddyPress Trac] #4954: Migrate BP's custom URI parser to use WP's Rewrite API

[buddypress-trac]

#4954: Migrate BP's custom URI parser to use WP's Rewrite API
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 Reporter:  boonebgorges              |       Owner:  imath
     Type:  enhancement               |      Status:  assigned
 Priority:  high                      |   Milestone:  12.0.0
Component:  Route Parser              |     Version:
 Severity:  major                     |  Resolution:
 Keywords:  has-patch has-unit-tests  |
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Comment (by imath):

 In [changeset:"13461" 13461]:
 {{{
 #!CommitTicketReference repository="" revision="13461"
 Make canonical redirection & Ajax requesting BP Rewrites ready

 - Introduces `bp_core_setup_query_parser()` to decide when to postpone
 some key hooks firing to `bp_parse_query`.
 - Introduces `bp_core_get_query_parser()` to get the query parser in use.
 It contains a filter BP Classic will be able to use to force the Legacy
 URL parser. So far it uses legacy for pretty links and rewrites for plain
 links.
 - Edit `bp_redirect_canonical()` & `bp_get_canonical_url()` so that they
 use the BP Rewrites API.
 - Introduces `bp_core_set_ajax_uri_globals()` to set the BuddyPress URI
 globales using the BP Rewrites API inside the Ajax context thanks to the
 updated `bp_reset_query()` function.
 - To avoid using `WP()` at each Ajax call, introduces a simple Ajax
 actions registration process thanks to the new
 `bp_ajax_register_action()`.
 - Update Legacy & Nouveau template packs so that they use this logic. As
 BP Default will require the legacy URL parser and will be moved inside BP
 Classic, the theme can stay the way it is.
 - Improve the `bp_rewrites_pre_get_slug` filter logic making it depends on
 the `bp_core_get_query_parser()` function.
 - Make sure to reset the Members navigation to a new `BP_Core_Nav` based
 on the displayed user once the user is available in the component's
 `parse_query()` method.

 Props r-a-y, johnjamesjacoby, boonebgorges

 Closes https://github.com/buddypress/buddypress/pull/91
 See #4954
 }}}

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Ticket URL: <https://buddypress.trac.wordpress.org/ticket/4954#comment:89>
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