build cache for modules/pages

[akileez]

pre-requirements:

• have helper read from cache whatever module/page needs rendering.
• if page changes, update the cache with said page to prevent reading all pages into cache on any individual change.
• reconfig the watch process to effect these modifications
• need a new function to handle the mapping.
• do this in helpers or rendr app
• if done in helpers, helpers would have to be reloaded.
• if done in app, data must be exposed to helpers
• if doing this, fileTree process will have to change for modules/pages

[akileez]

algo:

• [x] build cache for pages/modules in app (new cache object)
• [x] merge global and page caches into one object, separate namespaces (function)
• [x] pass said object to rendr
• [x] helpers will read global data for context (this.something or this && this.something as a guard)
• [x] middleware helpers will use page cache for processing (this.somethingElse)

maintenance:

• [x] caches must be updated upon change in pages/modules (chokidar)
• [ ] helpers must be refactored to reflect new environment and prevent updating html code base
• [x] change fileTree to not read in pages/modules directory, will now only track static assets

benefits:

• won't have to refresh helpers in this case
• less disk reads during render time under watch

[akileez]

fileTree will be the glue process between the two separate namespaced caches.

fileTree process cannot be change after all. if using two separate namespace caches, template files must be able to access names in page cache. we can do this via fileTree.

Middleware helpers will take path as source (present operation), normalize path to keyValue name in page cache then read said key from the cache.

[akileez]

alternative is to just attach the page cache to the global cache and call it a day.

[akileez]

base implementation working in test. attached page cache to global cache. need to do a clean up of the code

[akileez]

• [x] need to clean up unlink process for module watch.
• [x] delete key of removed file.
• [x] also refactor the module watch process to use .on('all', ...) instead of the individual emitted events

[akileez]

• [x] update collection helper to use this process.

[akileez]

process complete. move into repo later.

[akileez]

done. https://github.com/akileez/rendr/commit/2505ea3caa51c9266f4f908a4452cfb184e5da14