use bucket map & update persist() (#71)

* Expand usage of bucket map

* remove the

* Use bucket map for clear site data

* short-circuit if bucket is already persistent

index.bs

@@ -72,18 +72,18 @@ dictionary StorageBucketOptions {
 The <dfn method for="StorageBucketManager">open(|name|, |options|)</dfn> method steps are:
 
 1. Let |environment| be [=/this=]'s [=/relevant settings object=].
+
+1. Let |shelf| be the result of running [=obtain a local storage shelf=] given |environment|.
 
-1. Let |storageKey| be the result of running [=obtain a storage key=] given |environment|.
-
-1. If |storageKey| is failure, then [=exception/throw=] a "{{SecurityError}}" {{DOMException}} and abort these steps.
+1. If |shelf| is failure, then [=exception/throw=] an "{{UnknownError}}" {{DOMException}} and abort these steps.
 
 1. Let |p| be [=a new promise=].
 
 1. Run the following steps [=in parallel=]:
 
     1. If the result of [=validate a bucket name=] with |name| is failure, then [=/reject=] |p| with an {{TypeError}} and abort these steps.
 
-    1. Let |r| be the result of running [=open a bucket=] with |storageKey|, |name|, and |options|.
+    1. Let |r| be the result of running [=open a bucket=] with |shelf|, |name|, and |options|.
 
     1. If |r| is failure, then [=reject=] |p| with a {{TypeError}} and abort these steps.
 
@@ -95,7 +95,7 @@ The <dfn method for="StorageBucketManager">open(|name|, |options|)</dfn> method
 
 <div algorithm>
 
-To <dfn>open a bucket</dfn> for a |storageKey| given a bucket |name| and optional |options|, run the following steps:
+To <dfn>open a bucket</dfn> for a |shelf| given a bucket |name| and optional |options|, run the following steps:
 
 1. Let |expires| be |options|["{{StorageBucketOptions/expires}}"] if it exists, otherwise undefined.
 
@@ -113,7 +113,7 @@ To <dfn>open a bucket</dfn> for a |storageKey| given a bucket |name| and optiona
 
     1. If |permission| is "{{PermissionState/granted}}", then set |persisted| to true.
 
-1. Let |bucket| be the [=/storage bucket=] named |name| in |storageKey| or null otherwise.
+1. Let |bucket| be |shelf|'s [=bucket map=][|name|] if exists or null otherwise.
 
 1. If |bucket| is non-null and |bucket|'s [=StorageBucket/expiration value=] is less than or equal to now, then:
 
@@ -168,17 +168,17 @@ The <dfn method for="StorageBucketManager">delete(|name|)</dfn> method steps are
 
 1. Let |environment| be [=/this=]'s [=/relevant settings object=].
 
-1. Let |storageKey| be the result of running [=obtain a storage key=] given |environment|.
+1. Let |shelf| be the result of running [=obtain a local storage shelf=] given |environment|.
 
-1. If |storageKey| is failure, then [=exception/throw=] a "{{SecurityError}}" {{DOMException}} and abort these steps.
+1. If |shelf| is failure, then [=exception/throw=] an "{{UnknownError}}" {{DOMException}} and abort these steps.
 
 1. Let |p| be [=a new promise=].
 
 1. Run the following steps [=in parallel=]:
 
     1. If the result of [=validate a bucket name=] with |name| is failure, then [=/reject=] |p| with an {{InvalidCharacterError}} and abort these steps.
 
-    1. Let |bucket| be the [=/storage bucket=] with [=map/key=] |name| in [=bucket map=] if one exists. Otherwise return.
+    1. Let |bucket| be |shelf|'s [=bucket map=][|name|] if exists. Otherwise return.
 
     1. Remove |bucket|.
 
@@ -268,6 +268,8 @@ The <dfn method for="StorageBucket">persist()</dfn> method steps are:
     1. Let |bucket| be [=this=]'s [=/storage bucket=].
 
     1. If |bucket| has been removed, [=reject=] |p| with {{InvalidStateError}}.
+
+    1. If |bucket|'s [=bucket mode=] is `"persistent"`, [=/resolve=] |p| with true.
 
     1. Otherwise,
 
@@ -560,13 +562,15 @@ Issue: add the steps below to the algorithm in [[clear-site-data#clear-response]
 
 To <dfn>clear data with buckets</dfn>, execute the following steps:
 
+1. Let |shelf| be the result of running [=obtain a local storage shelf=] given |environment|.
+
+1. If |shelf| is failure, then [=exception/throw=] an "{{UnknownError}}" {{DOMException}} and abort these steps.
+
 1. For each |type| in |types|, execute the following steps:
 
     1. If |type| is not a [=tuple=] or |type|[0] is not `"storage-bucket"`, abort these steps.
 
-    1. Let |bucket name| be |type|[1].
-
-    1. Let |bucket| be the [=/storage bucket=] named |bucket name| in |storageKey| if one exists. Otherwise abort these steps.
+    1. Let |bucket| be |shelf|'s [=bucket map=][|bucket name|] if one exists. Otherwise abort these steps
 
     1. Remove |bucket|.