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seen.clj
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seen.clj
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(ns oc.lib.change.resources.seen
"Store tuples of: user-id, container-id, item-id and timestamp, with a TTL"
(:require [taoensso.faraday :as far]
[schema.core :as schema]
[oc.lib.schema :as lib-schema]
[taoensso.timbre :as timbre]
[oc.lib.dynamo.common :as ttl]))
(def entire-container "9999-9999-9999")
(defn table-name [db-opts]
(keyword (str (:table-prefix db-opts) "_seen")))
(def container-id-item-id-gsi-projection :all)
(defn container-id-item-id-gsi-name [db-opts]
(keyword (str (:table-prefix db-opts) "_seen_gsi_container_id_item_id")))
(def container-id-gsi-projection :all)
(defn container-id-gsi-name [db-opts]
(keyword (str (:table-prefix db-opts) "_seen_gsi_container_id")))
(defn org-id-user-id-gsi-name [db-opts]
(keyword (str (:table-prefix db-opts) "_seen_gsi_org_id_user_id")))
(defn- create-container-item-id [container-id item-id]
(str container-id "-" item-id))
(declare retrieve-by-container-item)
(declare store!)
(schema/defn ^:always-validate delete-by-item!
[db-opts container-id :- lib-schema/UniqueID item-id :- lib-schema/UniqueID]
(doseq [item (far/query db-opts (table-name db-opts) {:container_id [:eq container-id]
:item_id [:eq item-id]}
{:index (container-id-item-id-gsi-name db-opts)})]
(far/delete-item db-opts (table-name db-opts) {:container_item_id (:container_item_id item)
:user_id (:user_id item)})))
(schema/defn ^:always-validate delete-by-container!
[db-opts container-id :- lib-schema/UniqueID]
(doseq [item (far/query db-opts (table-name db-opts) {:container_id [:eq container-id]} {:index (container-id-gsi-name db-opts)})]
(far/delete-item db-opts (table-name db-opts) {:container_item_id (:container_item_id item)
:user_id (:user_id item)})))
(schema/defn ^:always-validate move-item!
[db-opts item-id :- lib-schema/UniqueID old-container-id :- lib-schema/UniqueID new-container-id :- lib-schema/UniqueID]
(let [items-to-move (retrieve-by-container-item db-opts old-container-id item-id)]
(timbre/info "Seen move-item! for" item-id "moving:" (count items-to-move) "items from container" old-container-id "to" new-container-id)
(doseq [item items-to-move]
(store! db-opts (assoc item :container-id new-container-id))
(delete-by-item! db-opts old-container-id item-id))
true))
(schema/defn ^:always-validate retrieve :- [{:container-id lib-schema/UniqueID
:item-id lib-schema/UniqueID
:seen-at lib-schema/ISO8601}]
[db-opts user-id :- lib-schema/UniqueID]
(->> (far/query db-opts (table-name db-opts) {:user_id [:eq user-id]}
{:filter-expr "#k > :v"
:expr-attr-names {"#k" "ttl"}
:expr-attr-vals {":v" (ttl/ttl-now)}})
(map #(clojure.set/rename-keys % {:container_id :container-id :item_id :item-id :seen_at :seen-at}))
(map #(select-keys % [:container-id :item-id :seen-at]))))
(schema/defn ^:always-validate retrieve-by-container-item :- [{(schema/optional-key :org-id) lib-schema/UniqueID
(schema/optional-key :container-id) lib-schema/UniqueID
(schema/optional-key :item-id) lib-schema/UniqueID
(schema/optional-key :container-item-id) lib-schema/DoubleUniqueID
(schema/optional-key :user-id) lib-schema/UniqueID
(schema/optional-key :seen-at) lib-schema/ISO8601
(schema/optional-key :seen-ttl) schema/Any}]
[db-opts container-id :- lib-schema/UniqueID item-id :- lib-schema/UniqueID]
(->> (far/query db-opts (table-name db-opts) {:container_id [:eq container-id]
:item_id [:eq item-id]}
{:index (container-id-item-id-gsi-name db-opts)})
(map #(clojure.set/rename-keys % {:org_id :org-id
:container_id :container-id
:item_id :item-id
:container_item_id :container-item-id
:user_id :user-id
:seen_at :seen-at
:seen_ttl :seen-ttl}))
(map #(select-keys % [:org-id :container-id :item-id :container-item-id :user-id :seen-at :seen-ttl]))))
(schema/defn ^:always-validate retrieve-by-user-org :- [{(schema/optional-key :container-id) lib-schema/UniqueID
(schema/optional-key :item-id) lib-schema/UniqueID
(schema/optional-key :seen-at) lib-schema/ISO8601}]
[db-opts user-id :- lib-schema/UniqueID org-id :- lib-schema/UniqueID]
(->> (far/query db-opts (table-name db-opts) {:org_id [:eq org-id]
:user_id [:eq user-id]}
{:index (org-id-user-id-gsi-name db-opts)})
(map #(clojure.set/rename-keys % {:container_id :container-id :item_id :item-id :seen_at :seen-at}))
(map #(select-keys % [:item-id :container-id :seen-at]))))
(schema/defn ^:always-validate retrieve-by-user-container :- {(schema/optional-key :org-id) lib-schema/UniqueID
(schema/optional-key :container-id) lib-schema/UniqueID
(schema/optional-key :seen-at) lib-schema/ISO8601}
[db-opts user-id :- lib-schema/UniqueID container-id :- lib-schema/UniqueID]
(let [seen-items (far/query db-opts (table-name db-opts) {:container_id [:eq container-id]
:user_id [:eq user-id]}
{:index (container-id-gsi-name db-opts)})]
(if (seq seen-items)
(-> (first seen-items)
(clojure.set/rename-keys {:container_id :container-id :org_id :org-id :seen_at :seen-at})
(select-keys [:org-id :container-id :seen-at]))
{})))
(schema/defn ^:always-validate retrieve-by-user-item :- (schema/maybe {:org-id lib-schema/UniqueID
:container-id lib-schema/UniqueID
:item-id lib-schema/UniqueID
:seen-at lib-schema/ISO8601})
[db-opts user-id :- lib-schema/UniqueID item-id :- lib-schema/UniqueID]
(let [items (far/query db-opts (table-name db-opts) {:user_id [:eq user-id]}
{:filter-expr "#k = :v"
:expr-attr-names {"#k" "item_id"}
:expr-attr-vals {":v" item-id}})]
(when-let [item (first items)]
(-> item
(clojure.set/rename-keys {:org_id :org-id :container_id :container-id :item_id :item-id :seen_at :seen-at})
(select-keys [:org-id :container-id :item-id :seen-at])))))
(schema/defn ^:always-validate store!
;; Clone a seen item, NB: it uses dashed keys, not underscores
([db-opts seen-item]
(store! db-opts (:user-id seen-item) (:org-id seen-item) (:container-id seen-item) (:item-id seen-item)
(:seen-at seen-item) (:seen-ttl seen-item)))
;; Saw the whole container, so the item-id is a placeholder
([db-opts
user-id :- lib-schema/UniqueID
org-id :- lib-schema/UniqueID
container-id :- lib-schema/UniqueID
seen-at :- lib-schema/ISO8601
seen-ttl :- schema/Int]
(store! db-opts user-id org-id container-id entire-container seen-at seen-ttl))
;; Store a seen entry for the specified user
([db-opts
user-id :- lib-schema/UniqueID
org-id :- lib-schema/UniqueID
container-id :- lib-schema/UniqueID
item-id :- lib-schema/UniqueID
seen-at :- lib-schema/ISO8601
seen-ttl :- schema/Int]
(let [prev-seen (retrieve-by-user-item db-opts user-id item-id)]
(when (pos? (compare seen-at (:seen-at prev-seen)))
(far/put-item db-opts (table-name db-opts) {
:user_id user-id
:org_id org-id
:container_item_id (create-container-item-id container-id item-id)
:container_id container-id
:item_id item-id
:seen_at seen-at
:ttl (ttl/ttl-epoch seen-ttl)})))
true))
(comment
(require '[oc.lib.time :as oc-time])
(require '[oc.change.resources.seen :as seen] :reload)
(far/list-tables db-opts)
(far/delete-table db-opts (lib-seen/table-name db-opts))
(aprint
(far/create-table db-opts
(lib-seen/table-name db-opts)
[:user_id :s]
{:range-keydef [:container_item_id :s]
:billing-mode :pay-per-request
:block? true}))
;; GSI used for delete via item-id
(aprint
@(far/update-table config/dynamodb-opts
(lib-seen/table-name db-opts)
{:gsindexes {:operation :create
:name seen/container-id-item-id-gsi-name
:billing-mode :pay-per-request
:hash-keydef [:item_id :s]
:range-keydef [:container_id :s]
:projection :all}}))
(doseq [item (far/query config/dynamodb-opts (lib-seen/table-name db-opts) {:container_id [:eq "25a3-4692-bf02"]
:item_id [:eq "512b-4ad1-9924"]}
{:index seen/container-id-item-id-gsi-name})]
(aprint
(far/delete-item config/dynamodb-opts (lib-seen/table-name db-opts) {:container_item_id (:container_item_id item)
:user_id (:user_id item)})))
;; GSI used for delete via container-id
(aprint
@(far/update-table config/dynamodb-opts
(lib-seen/table-name db-opts)
{:gsindexes {:operation :create
:name seen/container-id-gsi-name
:billing-mode :pay-per-request
:hash-keydef [:container_id :s]
:range-keydef [:user_id :s]
:projection :all}}))
(doseq [item (far/query config/dynamodb-opts (lib-seen/table-name db-opts) {:container_id [:eq "25a3-4692-bf02"]} {:index seen/container-id-gsi-name})]
(aprint
(far/delete-item config/dynamodb-opts (lib-seen/table-name db-opts) {:container_item_id (:container_item_id item)
:user_id (:user_id item)})))
(far/delete-item config/dynamodb-opts (lib-seen/table-name db-opts) {:container_item_id "25a3-4692-bf02-512b-4ad1-9924"})
(aprint (far/describe-table config/dynamodb-opts (lib-seen/table-name db-opts)))
(lib-seen/store! db-opts "abcd-1234-abcd" "5678-edcb-5678" (oc-time/current-timestamp))
(lib-seen/retrieve db-opts "abcd-1234-abcd")
(lib-seen/store! db-opts "abcd-1234-abcd" "1ab1-2ab2-3ab3" "1111-1111-1111" (oc-time/current-timestamp))
(lib-seen/retrieve db-opts "abcd-1234-abcd")
(far/delete-table db-opts (lib-seen/table-name db-opts))
)