{{/*
# Copyright © 2020 Amdocs, Bell Canada, Orange
# Modifications Copyright © 2023 Nordix Foundation
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#       http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
*/}}

{{/*
  Calculate if we are on service mesh.
*/}}
{{- define "common.onServiceMesh" -}}
{{-   if .Values.global.serviceMesh -}}
{{-     if (default false .Values.global.serviceMesh.enabled) -}}
true
{{-     end -}}
{{-   end -}}
{{- end -}}

{{/*
  Kills the sidecar proxy associated with a pod.
*/}}
{{- define "common.serviceMesh.killSidecar" -}}
{{-   if (include "common.onServiceMesh" .) }}
RCODE="$?";
echo "*** script finished with exit code $RCODE" ;
echo "*** killing service mesh sidecar" ;
curl -sf -X POST http://127.0.0.1:15020/quitquitquit ;
echo "" ;
echo "*** exiting with script exit code" ;
exit "$RCODE"
{{-   end }}
{{- end -}}

{{/*
  Wait for job container.
*/}}
{{- define "common.waitForJobContainer" -}}
{{-   $dot := default . .dot -}}
{{-   $wait_for_job_container := default $dot.Values.wait_for_job_container .wait_for_job_container -}}
{{- if (include "common.onServiceMesh" .) }}
- name: {{ include "common.name" $dot }}{{ ternary "" (printf "-%s" $wait_for_job_container.name) (empty $wait_for_job_container.name) }}-service-mesh-wait-for-job-container
  image: {{ include "repositoryGenerator.image.quitQuit" $dot }}
  imagePullPolicy: {{ $dot.Values.global.pullPolicy | default $dot.Values.pullPolicy }}
  command:
  - /bin/sh
  - "-c"
  args:
  - echo "waiting 10s for istio side cars to be up"; sleep 10s;
    {{- range $container := $wait_for_job_container.containers }}
    /app/ready.py --service-mesh-check {{ tpl $container $dot }} -t 45;
    {{- end }}
  env:
  - name: NAMESPACE
    valueFrom:
      fieldRef:
        apiVersion: v1
        fieldPath: metadata.namespace
{{- end }}
{{- end }}

{{/*
  Use Authorization Policies or not.
*/}}
{{- define "common.useAuthorizationPolicies" -}}
{{-   if (include "common.onServiceMesh" .) }}
{{-     if .Values.global.authorizationPolicies -}}
{{-       if (default false .Values.global.authorizationPolicies.enabled) -}}
true
{{-       end -}}
{{-     end -}}
{{-   end -}}
{{- end -}}

{{/*
  Create Authorization Policy template.
    If common.useAuthorizationPolicies returns true:
      Will create authorization policy, provided with array of authorized principals in .Values.serviceMesh.authorizationPolicy.authorizedPrincipals
        in the format:
          authorizedPrincipals:
          - serviceAccount: <serviceaccount name>                       (Mandatory)
            namespace: <namespace name>                                 (Optional, will default to onap)
            allowedOperationMethods: <list of allowed HTTP operations   (Optional, will default to ["GET", "POST", "PUT", "PATCH", "DELETE"])

      If no authorizedPrincipals provided, will default to denying all requests to the app matched under the
        spec:
          selector:
            matchLabels:
              app: <app-to-match>    ("app" corresponds to a key defined in "common.labels", which is included in "common.service")

    If common.useAuthorizationPolicies returns false:
      Will not create an authorization policy
*/}}
{{- define "common.authorizationPolicy" -}}
{{-   $dot := default . .dot -}}
{{-   $trustedDomain := default "cluster.local" $dot.Values.serviceMesh.authorizationPolicy.trustedDomain -}}
{{-   $authorizedPrincipals := default list $dot.Values.serviceMesh.authorizationPolicy.authorizedPrincipals -}}
{{-   $defaultOperationMethods := list "GET" "POST" "PUT" "PATCH" "DELETE" -}}
{{-   $relName := include "common.release" . -}}
{{-   if (include "common.useAuthorizationPolicies" .) }}
apiVersion: security.istio.io/v1beta1
kind: AuthorizationPolicy
metadata:
  name: {{ include "common.fullname" (dict "suffix" "authz" "dot" . )}}
  namespace: {{ include "common.namespace" . }}
spec:
  selector:
    matchLabels:
      app: {{ include "common.servicename" . }}
  action: ALLOW
  rules:
{{-     if $authorizedPrincipals }}
{{-       range $principal := $authorizedPrincipals }}
  - from:
    - source:
        principals:
{{-         $namespace := default "onap" $principal.namespace -}}
{{-         if eq "onap" $namespace }}
        - "{{ $trustedDomain }}/ns/{{ $namespace }}/sa/{{ $relName }}-{{ $principal.serviceAccount }}"
{{-         else }}
        - "{{ $trustedDomain }}/ns/{{ $namespace }}/sa/{{ $principal.serviceAccount }}"
{{-         end }}
    to:
    - operation:
        methods:
{{-         if $principal.allowedOperationMethods }}
{{-           range $method := $principal.allowedOperationMethods }}
        - {{ $method }}
{{-           end }}
{{-         else }}
{{-           range $method := $defaultOperationMethods }}
        - {{ $method }}
{{-           end }}
{{-         end }}
{{-       end }}
{{-     end }}
{{-   end }}
{{- end -}}