{{/* vim: set filetype=mustache: */}}
{{/*
Expand the name of the chart.
*/}}
{{- define "airflow.name" -}}
{{- default .Chart.Name .Values.nameOverride | trunc 63 | trimSuffix "-" -}}
{{- end -}}

{{/*
Create chart name and version as used by the chart label.
*/}}
{{- define "airflow.chart" -}}
{{- printf "%s-%s" .Chart.Name .Chart.Version | replace "+" "_" | trunc 63 | trimSuffix "-" -}}
{{- end -}}

{{/*
Full path to CA Cert file
*/}}
{{- define "airflow.ldapCAFilename" }}
{{- printf "/opt/bitnami/airflow/certs/%s" .Values.ldap.tls.CAcertificateFilename -}}
{{- end -}}

{{/*
Fully qualified app name for LDAP
*/}}
{{- define "airflow.ldap" -}}
{{- printf "%s-ldap" (include "common.names.fullname" .) -}}
{{- end -}}

{{/*
Return the LDAP credentials secret.
*/}}
{{- define "airflow.ldapSecretName" -}}
{{/*
Helm 2.11 supports the assignment of a value to a variable defined in a different scope,
but Helm 2.9 and 2.10 doesn't support it, so we need to implement this if-else logic.
Also, we can't use a single if because lazy evaluation is not an option
*/}}
{{- if .Values.global }}
    {{- if .Values.global.ldap }}
        {{- if .Values.global.ldap.existingSecret }}
            {{- printf "%s" .Values.global.ldap.existingSecret -}}
        {{- else if .Values.ldap.existingSecret -}}
            {{- printf "%s" .Values.ldap.existingSecret -}}
        {{- else -}}
            {{- printf "%s" (include "airflow.ldap" .) -}}
        {{- end -}}
     {{- else if .Values.ldap.existingSecret -}}
         {{- printf "%s" .Values.ldap.existingSecret -}}
     {{- else -}}
         {{- printf "%s" (include "airflow.ldap" .) -}}
     {{- end -}}
{{- else -}}
     {{- if .Values.ldap.existingSecret -}}
         {{- printf "%s" .Values.ldap.existingSecret -}}
     {{- else -}}
         {{- printf "%s" (include "airflow.ldap" .) -}}
     {{- end -}}
{{- end -}}
{{- end -}}

{{/*
Return the proper Airflow image name
*/}}
{{- define "airflow.image" -}}
{{- include "common.images.image" (dict "imageRoot" .Values.web.image "global" .Values.global) -}}
{{- end -}}

{{/*
Return the proper Airflow Scheduler image name
*/}}
{{- define "airflow.schedulerImage" -}}
{{- include "common.images.image" (dict "imageRoot" .Values.scheduler.image "global" .Values.global) -}}
{{- end -}}

{{/*
Return the proper Airflow Worker image name
*/}}
{{- define "airflow.workerImage" -}}
{{- include "common.images.image" (dict "imageRoot" .Values.worker.image "global" .Values.global) -}}
{{- end -}}

{{/*
Return the proper git image name
*/}}
{{- define "git.image" -}}
{{- include "common.images.image" (dict "imageRoot" .Values.git.image "global" .Values.global) -}}
{{- end -}}

{{/*
Return the proper Airflow Metrics image name
*/}}
{{- define "airflow.metrics.image" -}}
{{- include "common.images.image" (dict "imageRoot" .Values.metrics.image "global" .Values.global) -}}
{{- end -}}

{{/*
Return the proper load Airflow DAGs image name
*/}}
{{- define "airflow.dags.image" -}}
{{- include "common.images.image" (dict "imageRoot" .Values.dags.image "global" .Values.global) -}}
{{- end -}}

{{/*
Return the proper Docker Image Registry Secret Names
*/}}
{{- define "airflow.imagePullSecrets" -}}
{{- include "common.images.pullSecrets" (dict "images" (list .Values.web.image .Values.scheduler.image .Values.worker.image .Values.git .Values.metrics.image) "global" .Values.global) -}}
{{- end -}}

{{/*
Create a default fully qualified postgresql name.
We truncate at 63 chars because some Kubernetes name fields are limited to this (by the DNS naming spec).
*/}}
{{- define "airflow.postgresql.fullname" -}}
{{- include "common.names.dependency.fullname" (dict "chartName" "postgresql" "chartValues" .Values.postgresql "context" $) -}}
{{- end -}}

{{/*
Create a default fully qualified redis name.
We truncate at 63 chars because some Kubernetes name fields are limited to this (by the DNS naming spec).
*/}}
{{- define "airflow.redis.fullname" -}}
{{- include "common.names.dependency.fullname" (dict "chartName" "redis-master" "chartValues" .Values.redis "context" $) -}}
{{- end -}}

{{/*
Get the Redis&trade; credentials secret.
*/}}
{{- define "airflow.redis.secretName" -}}
{{- if and (.Values.redis.enabled) (not .Values.redis.auth.existingSecret) -}}
    {{/* Create a include for the redis secret
    We truncate at 63 chars because some Kubernetes name fields are limited to this (by the DNS naming spec).
    */}}
    {{- $name := default "redis" .Values.redis.nameOverride -}}
    {{- printf "%s-%s" .Release.Name $name | trunc 63 | trimSuffix "-" -}}
{{- else if and (.Values.redis.enabled) ( .Values.redis.auth.existingSecret) -}}
    {{- printf "%s" .Values.redis.auth.existingSecret -}}
{{- else }}
    {{- if .Values.externalRedis.existingSecret -}}
        {{- printf "%s" .Values.externalRedis.existingSecret -}}
    {{- else -}}
        {{ printf "%s-%s" .Release.Name "externalredis" }}
    {{- end -}}
{{- end -}}
{{- end -}}

{{/*
Get the Postgresql credentials secret.
*/}}
{{- define "airflow.postgresql.secretName" -}}
{{- if .Values.postgresql.enabled }}
    {{- if .Values.global.postgresql }}
        {{- if .Values.global.postgresql.auth }}
            {{- if .Values.global.postgresql.auth.existingSecret }}
                {{- tpl .Values.global.postgresql.auth.existingSecret $ -}}
            {{- else -}}
                {{- default (include "airflow.postgresql.fullname" .) (tpl .Values.postgresql.auth.existingSecret $) -}}
            {{- end -}}
        {{- else -}}
            {{- default (include "airflow.postgresql.fullname" .) (tpl .Values.postgresql.auth.existingSecret $) -}}
        {{- end -}}
    {{- else -}}
        {{- default (include "airflow.postgresql.fullname" .) (tpl .Values.postgresql.auth.existingSecret $) -}}
    {{- end -}}
{{- else -}}
    {{- default (printf "%s-externaldb" .Release.Name) (tpl .Values.externalDatabase.existingSecret $) -}}
{{- end -}}
{{- end -}}

{{/*
Get the secret name
*/}}
{{- define "airflow.secretName" -}}
{{- if .Values.auth.existingSecret -}}
  {{- printf "%s" .Values.auth.existingSecret -}}
{{- else -}}
  {{- printf "%s" (include "common.names.fullname" .) -}}
{{- end -}}
{{- end -}}

{{/*
Get the configmap name
*/}}
{{- define "airflow.configMapName" -}}
{{- if .Values.existingConfigmap -}}
  {{- printf "%s" (tpl .Values.existingConfigmap $) -}}
{{- else -}}
  {{- printf "%s-configuration" (include "common.names.fullname" .) -}}
{{- end -}}
{{- end -}}

{{/*
Load DAGs init-container
*/}}
{{- define "airflow.loadDAGsInitContainer" -}}
{{- $compDefinition := (get .context.Values .component) -}}
- name: load-dags
  image: {{ include "airflow.dags.image" .context }}
  imagePullPolicy: {{ .context.Values.dags.image.pullPolicy }}
  {{- if $compDefinition.containerSecurityContext.enabled }}
  securityContext: {{- omit $compDefinition.containerSecurityContext "enabled" | toYaml | nindent 4 }}
  {{- end }}
  command:
    - /bin/bash
  args:
    - -ec
    - |
      cp /configmap/* /dags
  volumeMounts:
    - name: load-external-dag-files
      mountPath: /configmap
    - name: external-dag-files
      mountPath: /dags
{{- end -}}

{{/*
Create the name of the service account to use
*/}}
{{- define "airflow.serviceAccountName" -}}
{{- if .Values.serviceAccount.create -}}
    {{ default (include "common.names.fullname" .) .Values.serviceAccount.name }}
{{- else -}}
    {{ default "default" .Values.serviceAccount.name }}
{{- end -}}
{{- end -}}

{{/*
Add environment variables to configure database values
*/}}
{{- define "airflow.database.host" -}}
{{- ternary (include "airflow.postgresql.fullname" .) .Values.externalDatabase.host .Values.postgresql.enabled | quote -}}
{{- end -}}

{{/*
Add environment variables to configure database values
*/}}
{{- define "airflow.database.user" -}}
{{- if .Values.postgresql.enabled }}
    {{- if .Values.global.postgresql }}
        {{- if .Values.global.postgresql.auth }}
            {{- coalesce .Values.global.postgresql.auth.username .Values.postgresql.auth.username | quote -}}
        {{- else -}}
            {{- .Values.postgresql.auth.username | quote -}}
        {{- end -}}
    {{- else -}}
        {{- .Values.postgresql.auth.username | quote -}}
    {{- end -}}
{{- else -}}
    {{- .Values.externalDatabase.user | quote -}}
{{- end -}}
{{- end -}}

{{/*
Add environment variables to configure database values
*/}}
{{- define "airflow.database.name" -}}
{{- if .Values.postgresql.enabled }}
    {{- if .Values.global.postgresql }}
        {{- if .Values.global.postgresql.auth }}
            {{- coalesce .Values.global.postgresql.auth.database .Values.postgresql.auth.database | quote -}}
        {{- else -}}
            {{- .Values.postgresql.auth.database | quote -}}
        {{- end -}}
    {{- else -}}
        {{- .Values.postgresql.auth.database | quote -}}
    {{- end -}}
{{- else -}}
    {{- .Values.externalDatabase.database | quote -}}
{{- end -}}
{{- end -}}

{{/*
Add environment variables to configure database values
*/}}
{{- define "airflow.database.existingsecret.key" -}}
{{- if .Values.postgresql.enabled -}}
    {{- printf "%s" "password" -}}
{{- else -}}
    {{- if .Values.externalDatabase.existingSecret -}}
        {{- if .Values.externalDatabase.existingSecretPasswordKey -}}
            {{- printf "%s" .Values.externalDatabase.existingSecretPasswordKey -}}
        {{- else -}}
            {{- printf "%s" "password" -}}
        {{- end -}}
    {{- else -}}
        {{- printf "%s" "password" -}}
    {{- end -}}
{{- end -}}
{{- end -}}

{{/*
Add environment variables to configure database values
*/}}
{{- define "airflow.database.port" -}}
{{- ternary "5432" .Values.externalDatabase.port .Values.postgresql.enabled | quote -}}
{{- end -}}

{{/*
Add environment variables to configure database values
*/}}
{{- define "airflow.redis.existingsecret.key" -}}
{{- if .Values.redis.enabled -}}
    {{- printf "%s" "redis-password" -}}
{{- else -}}
    {{- if .Values.externalRedis.existingSecret -}}
        {{- if .Values.externalRedis.existingSecretPasswordKey -}}
            {{- printf "%s" .Values.externalRedis.existingSecretPasswordKey -}}
        {{- else -}}
            {{- printf "%s" "redis-password" -}}
        {{- end -}}
    {{- else -}}
        {{- printf "%s" "redis-password" -}}
    {{- end -}}
{{- end -}}
{{- end -}}

{{/*
Add environment variables to configure database values
*/}}
{{- define "airflow.configure.database" -}}
- name: AIRFLOW_DATABASE_NAME
  value: {{ include "airflow.database.name" . }}
- name: AIRFLOW_DATABASE_USERNAME
  value: {{ include "airflow.database.user" . }}
- name: AIRFLOW_DATABASE_PASSWORD
  valueFrom:
    secretKeyRef:
      name: {{ include "airflow.postgresql.secretName" . }}
      key: {{ include "airflow.database.existingsecret.key" . }}
- name: AIRFLOW_DATABASE_HOST
  value: {{ include "airflow.database.host" . }}
- name: AIRFLOW_DATABASE_PORT_NUMBER
  value: {{ include "airflow.database.port" . }}
{{- end -}}

{{/*
Add environment variables to configure redis values
*/}}
{{- define "airflow.configure.redis" -}}
{{- if (not (eq .Values.executor "KubernetesExecutor" )) }}
- name: REDIS_HOST
  value: {{ ternary (include "airflow.redis.fullname" .) .Values.externalRedis.host .Values.redis.enabled | quote }}
- name: REDIS_PORT_NUMBER
  value: {{ ternary "6379" .Values.externalRedis.port .Values.redis.enabled | quote }}
{{- if and (not .Values.redis.enabled) .Values.externalRedis.username }}
- name: REDIS_USER
  value: {{ .Values.externalRedis.username | quote }}
{{- end }}
- name: REDIS_PASSWORD
  valueFrom:
    secretKeyRef:
      name: {{ include "airflow.redis.secretName" . }}
      key: redis-password
{{- end }}
{{- end -}}

{{/*
Add environment variables to configure airflow common values
*/}}
{{- define "airflow.configure.airflow.common" -}}
- name: AIRFLOW_FERNET_KEY
  valueFrom:
    secretKeyRef:
      name: {{ include "airflow.secretName" . }}
      key: airflow-fernet-key
- name: AIRFLOW_SECRET_KEY
  valueFrom:
    secretKeyRef:
      name: {{ include "airflow.secretName" . }}
      key: airflow-secret-key
- name: AIRFLOW_LOAD_EXAMPLES
  value: {{ ternary "yes" "no" .Values.loadExamples | quote }}
{{- if .Values.web.image.debug }}
- name: BASH_DEBUG
  value: "1"
- name: BITNAMI_DEBUG
  value: "true"
{{- end }}
{{- end -}}

{{/*
Add environment variables to configure airflow kubernetes executor
*/}}
{{- define "airflow.configure.airflow.kubernetesExecutor" -}}
{{- if or (eq .Values.executor "KubernetesExecutor") (eq .Values.executor "CeleryKubernetesExecutor") }}
- name: AIRFLOW__KUBERNETES__NAMESPACE
  value: {{ .Release.Namespace }}
- name: AIRFLOW__KUBERNETES__WORKER_CONTAINER_REPOSITORY
  value: {{ printf "%s/%s" .Values.worker.image.registry .Values.worker.image.repository }}
- name: AIRFLOW__KUBERNETES__WORKER_CONTAINER_TAG
  value: {{ .Values.worker.image.tag }}
- name: AIRFLOW__KUBERNETES__IMAGE_PULL_POLICY
  value: {{ .Values.worker.image.pullPolicy }}
- name: AIRFLOW__KUBERNETES__DAGS_IN_IMAGE
  value: "True"
- name: AIRFLOW__KUBERNETES__DELETE_WORKER_PODS
  value: "True"
- name: AIRFLOW__KUBERNETES__DELETE_WORKER_PODS_ON_FAILURE
  value: "False"
- name: AIRFLOW__KUBERNETES__WORKER_SERVICE_ACCOUNT_NAME
  value: {{ include "airflow.serviceAccountName" . }}
- name: AIRFLOW__KUBERNETES__POD_TEMPLATE_FILE
  value: "/opt/bitnami/airflow/pod_template.yaml"
{{- end }}
{{- end -}}

{{/*
Get the user defined LoadBalancerIP for this release.
Note, returns 127.0.0.1 if using ClusterIP.
*/}}
{{- define "airflow.serviceIP" -}}
{{- if eq .Values.service.type "ClusterIP" -}}
127.0.0.1
{{- else -}}
{{- .Values.service.loadBalancerIP | default "" -}}
{{- end -}}
{{- end -}}

{{/*
Gets the host to be used for this application.
If not using ClusterIP, or if a host or LoadBalancerIP is not defined, the value will be empty.
*/}}
{{- define "airflow.baseUrl" -}}
{{- $host := "" -}}
{{- $port := "" -}}
{{- $servicePortString := printf "%v" .Values.service.ports.http -}}
{{- if and (not (eq $servicePortString "80")) (not (eq $servicePortString "443")) -}}
  {{- $port = printf ":%s" $servicePortString -}}
{{- end -}}
{{- if .Values.ingress.enabled }}
  {{- $host = .Values.ingress.hostname | default "" -}}
{{- else -}}
  {{- $host = .Values.web.baseUrl | default "" -}}
{{- end }}
{{- $host = default (include "airflow.serviceIP" .) $host -}}
{{- if $host -}}
  {{- printf "http://%s%s" $host $port -}}
{{- else -}}
  {{- default "" .Values.web.baseUrl -}}
{{- end -}}
{{- end -}}

{{/*
Compile all warnings into a single message, and call fail.
*/}}
{{- define "airflow.validateValues" -}}
{{- $messages := list -}}
{{- $messages := append $messages (include "airflow.validateValues.dags.repositories" .) -}}
{{- $messages := append $messages (include "airflow.validateValues.dags.repository_details" .) -}}
{{- $messages := append $messages (include "airflow.validateValues.plugins.repositories" .) -}}
{{- $messages := append $messages (include "airflow.validateValues.plugins.repository_details" .) -}}
{{- $messages := without $messages "" -}}
{{- $message := join "\n" $messages -}}

{{- if $message -}}
{{-   printf "\nVALUES VALIDATION:\n%s" $message | fail -}}
{{- end -}}
{{- end -}}

{{/* Validate values of Airflow - At least one repository details must be provided when "git.dags.enabled" is "true" */}}
{{- define "airflow.validateValues.dags.repositories" -}}
  {{- if and .Values.git.dags.enabled (empty .Values.git.dags.repositories) -}}
airflow: git.dags.repositories
    At least one repository must be provided when enabling downloading DAG files
    from git repository (--set git.dags.repositories[0].repository="xxx"
    --set git.dags.repositories[0].name="xxx"
    --set git.dags.repositories[0].branch="name")
  {{- end -}}
{{- end -}}

{{/* Validate values of Airflow - "git.dags.repositories.repository", "git.dags.repositories.name", "git.dags.repositories.branch" must be provided when "git.dags.enabled" is "true" */}}
{{- define "airflow.validateValues.dags.repository_details" -}}
{{- if .Values.git.dags.enabled -}}
{{- range $index, $repository_detail := .Values.git.dags.repositories }}
{{- if empty $repository_detail.repository -}}
airflow: git.dags.repositories[$index].repository
    The repository must be provided when enabling downloading DAG files
    from git repository (--set git.dags.repositories[$index].repository="xxx")
{{- end -}}
{{- if empty $repository_detail.branch -}}
airflow: git.dags.repositories[$index].branch
    The branch must be provided when enabling downloading DAG files
    from git repository (--set git.dags.repositories[$index].branch="xxx")
{{- end -}}
{{- end -}}
{{- end -}}
{{- end -}}

{{/* Validate values of Airflow - "git.plugins.repositories" must be provided when "git.plugins.enabled" is "true" */}}
{{- define "airflow.validateValues.plugins.repositories" -}}
  {{- if and .Values.git.plugins.enabled (empty .Values.git.plugins.repositories) -}}
airflow: git.plugins.repositories
    At least one repository must be provided when enabling downloading DAG files
    from git repository (--set git.plugins.repositories[0].repository="xxx"
    --set git.plugins.repositories[0].name="xxx"
    --set git.plugins.repositories[0].branch="name")
  {{- end -}}
{{- end -}}

{{/* Validate values of Airflow - "git.plugins.repositories.repository", "git.plugins.repositories.name", "git.plugins.repositories.branch" must be provided when "git.plugins.enabled" is "true" */}}
{{- define "airflow.validateValues.plugins.repository_details" -}}
{{- if .Values.git.plugins.enabled -}}
{{- range $index, $repository_detail := .Values.git.plugins.repositories }}
{{- if empty $repository_detail.repository -}}
airflow: git.plugins.repositories[$index].repository
    The repository must be provided when enabling downloading DAG files
    from git repository (--set git.plugins.repositories[$index].repository="xxx")
{{- end -}}
{{- if empty $repository_detail.branch -}}
airflow: git.plugins.repositories[$index].branch
    The branch must be provided when enabling downloading DAG files
    from git repository (--set git.plugins.repositories[$index].branch="xxx")
{{- end -}}
{{- end -}}
{{- end -}}
{{- end -}}

{{/* Check if there are rolling tags in the images */}}
{{- define "airflow.checkRollingTags" -}}
{{- include "common.warnings.rollingTag" .Values.web.image }}
{{- include "common.warnings.rollingTag" .Values.scheduler.image }}
{{- include "common.warnings.rollingTag" .Values.worker.image }}
{{- include "common.warnings.rollingTag" .Values.git.image }}
{{- include "common.warnings.rollingTag" .Values.metrics.image }}
{{- end -}}

{{/*
In Airflow version 2.1.0, the CeleryKubernetesExecutor requires setting workers with CeleryExecutor in order to work properly.
This is a workaround and is subject to Airflow official resolution.
Ref: https://github.com/bitnami/charts/pull/6096#issuecomment-856499047
*/}}
{{- define "airflow.worker.executor" -}}
{{- if eq .Values.executor "CeleryKubernetesExecutor" -}}
{{- printf "CeleryExecutor" -}}
{{- else -}}
{{- .Values.executor -}}
{{- end -}}
{{- end -}}
