added training

Signed-off-by: ivan katliarchuk <[email protected]>

Author: ivankatliarchuk

playground/ex22/input.json

@@ -0,0 +1,22 @@
+{
+  "items": [
+    {
+      "id": "1bd91655",
+      "name": "Lunch with James",
+      "amount": 57.5
+    },
+    {
+      "id": "226c3910",
+      "name": "Flight to Berlin",
+      "amount": 389.78,
+      "category": "conferences"
+    },
+    {
+      "id": "db5a4b23",
+      "name": "Recurring SaaS Subscription",
+      "amount": 30,
+      "category": "saas",
+      "approved_by": "90400852"
+    }
+  ]
+}

playground/ex22/policy.rego

@@ -0,0 +1,32 @@
+package play
+
+# https://docs.styra.com/opa/rego-by-example/keywords/contains
+
+import rego.v1
+
+approval_min := 350
+
+reasons[item.id] contains "category must be set" if {
+	some item in input.items
+
+	object.get(item, "category", "") == ""
+}
+
+reasons[item.id] contains message if {
+	some item in input.items
+
+	item.amount > approval_min
+
+	object.get(item, "approved_by", "") == ""
+
+	message := sprintf(
+		"items over %d must be approved",
+		[approval_min],
+	)
+}
+
+reasons[item.id] contains "approver does not exist" if {
+	some item in input.items
+
+	not data.approvers[item.approved_by]
+}

playground/ex23/first.rego

@@ -0,0 +1,5 @@
+package package1
+
+import rego.v1
+
+name := "World"

playground/ex23/second.rego

@@ -0,0 +1,12 @@
+package package2
+
+import rego.v1
+
+import data.package1
+
+output := sprintf("Hello, %v", [package1.name])
+
+# or
+import data.package1 as p1
+
+output := sprintf("Hello, %v", [p1.name])

playground/ex24/policy.rego

@@ -0,0 +1,11 @@
+package play
+
+import rego.v1
+# https://docs.styra.com/opa/rego-by-example/keywords/some
+example_array := [1, "example", 3]
+
+filtered_array := [e |
+	some e in example_array
+
+	is_number(e)
+]

playground/ex25/policy.rego

@@ -0,0 +1,17 @@
+package play
+
+# https://docs.styra.com/opa/rego-by-example/keywords/some
+import rego.v1
+
+example_object := {
+	"read": true,
+	"write": true,
+	"delete": false,
+	"create": false,
+}
+
+permission_list contains permission if {
+	some permission, value in example_object
+
+	value == true
+}