[components] For mozilla-mobile/android-components#191 - Adds SearchS…

…uggestionClient and SuggestionParser

UltraBlame original commit: 540c1fe28641e5adf9582362b1343daee2c52977

mobile/android/android-components/components/browser/search/src/main/java/mozilla/components/browser/search/SearchSuggestionClient.kt

@@ -0,0 +1,108 @@
+package
+mozilla
+.
+components
+.
+browser
+.
+search
+import
+kotlinx
+.
+coroutines
+.
+experimental
+.
+async
+import
+kotlinx
+.
+coroutines
+.
+experimental
+.
+Deferred
+import
+mozilla
+.
+components
+.
+browser
+.
+search
+.
+parser
+.
+googleParser
+typealias
+SearchSuggestionFetcher
+=
+suspend
+(
+url
+:
+String
+)
+-
+>
+String
+?
+class
+SearchSuggestionClient
+(
+private
+val
+searchEngine
+:
+SearchEngine
+private
+val
+fetcher
+:
+SearchSuggestionFetcher
+)
+{
+suspend
+fun
+getSuggestions
+(
+query
+:
+String
+)
+:
+List
+<
+String
+>
+?
+{
+val
+suggestionsURL
+=
+searchEngine
+.
+buildSuggestionsURL
+(
+query
+)
+?
+:
+return
+null
+return
+fetcher
+(
+suggestionsURL
+)
+?
+.
+let
+{
+googleParser
+(
+it
+)
+}
+}
+}

mobile/android/android-components/components/browser/search/src/main/java/mozilla/components/browser/search/parser/SuggestionParser.kt

@@ -0,0 +1,156 @@
+package
+mozilla
+.
+components
+.
+browser
+.
+search
+.
+parser
+import
+org
+.
+json
+.
+JSONArray
+fun
+JSONArray
+.
+asSequence
+(
+)
+:
+Sequence
+<
+Any
+>
+{
+return
+object
+:
+Sequence
+<
+Any
+>
+{
+override
+fun
+iterator
+(
+)
+=
+object
+:
+Iterator
+<
+Any
+>
+{
+val
+it
+=
+(
+0
+until
+this
+asSequence
+.
+length
+(
+)
+)
+.
+iterator
+(
+)
+override
+fun
+next
+(
+)
+:
+Any
+{
+val
+i
+=
+it
+.
+next
+(
+)
+return
+this
+asSequence
+.
+get
+(
+i
+)
+}
+override
+fun
+hasNext
+(
+)
+=
+it
+.
+hasNext
+(
+)
+}
+}
+}
+typealias
+Parser
+=
+(
+String
+)
+-
+>
+List
+<
+String
+>
+val
+googleParser
+:
+Parser
+=
+{
+input
+-
+>
+JSONArray
+(
+input
+)
+.
+getJSONArray
+(
+1
+)
+.
+asSequence
+(
+)
+.
+map
+{
+it
+as
+?
+String
+}
+.
+filterNotNull
+(
+)
+.
+toList
+(
+)
+}