Remove global Cache (#448)

* Update to use Rust 2018.

* Update examples and use Rust 2018.

* Pass cache via `Context` around instead of being global.

* Remove `lazy_static` from `cache`-feature.

* Update examples to use `Context`'s cache.

* Replace cache's update-timeout-setting with `update_cache_timeout`.

* Update documentation to stop using global cache.

* Move `HttpAndCache` to `lib.rs`.

* Add `__nonexhaustive`-field to `CacheAndHttp`.

* Add `__nonexhaustive` in `CacheAndHttp`-initialisers.

* Avoid `__nonexhaustive`-usage in doctest.

* Remove unnecessary comma in `cfg`-attribute.

1 files changed, 3 insertions, 3 deletions

diff --git a/src/model/utils.rs b/src/model/utils.rs
index 2399db3..9cb9571 100644
--- a/src/model/utils.rs
+++ b/src/model/utils.rs
@@ -14,7 +14,7 @@ use crate::internal::prelude::*;
 #[cfg(all(feature = "cache", feature = "model"))]
 use super::permissions::Permissions;
 #[cfg(all(feature = "cache", feature = "model"))]
-use crate::CACHE;
+use crate::cache::Cache;
 
 pub fn default_true() -> bool {
     true
@@ -206,8 +206,8 @@ pub fn serialize_gen_locked_map<K: Eq + Hash, S: Serializer, V: Serialize>(
 }
 
 #[cfg(all(feature = "cache", feature = "model"))]
-pub fn user_has_perms(channel_id: ChannelId, mut permissions: Permissions) -> Result<bool> {
-    let cache = CACHE.read();
+pub fn user_has_perms(cache: &Arc<RwLock<Cache>>, channel_id: ChannelId, mut permissions: Permissions) -> Result<bool> {
+    let cache = cache.read();
     let current_user = &cache.user;
 
     let channel = match cache.channel(channel_id) {