{{/*
Expand the name of the chart.
*/}}
{{- define "yourls-nginx.name" -}}
{{- default .Chart.Name .Values.nameOverride | trunc 63 | trimSuffix "-" }}
{{- end }}

{{/*
Create a default fully qualified app name.
*/}}
{{- define "yourls-nginx.fullname" -}}
{{- if .Values.fullnameOverride }}
{{- .Values.fullnameOverride | trunc 63 | trimSuffix "-" }}
{{- else }}
{{- $name := default .Chart.Name .Values.nameOverride }}
{{- if contains $name .Release.Name }}
{{- .Release.Name | trunc 63 | trimSuffix "-" }}
{{- else }}
{{- printf "%s-%s" .Release.Name $name | trunc 63 | trimSuffix "-" }}
{{- end }}
{{- end }}
{{- end }}

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

{{/*
Common labels
*/}}
{{- define "yourls-nginx.labels" -}}
helm.sh/chart: {{ include "yourls-nginx.chart" . }}
{{ include "yourls-nginx.selectorLabels" . }}
{{- if .Chart.AppVersion }}
app.kubernetes.io/version: {{ .Chart.AppVersion | quote }}
{{- end }}
app.kubernetes.io/managed-by: {{ .Release.Service }}
{{- end }}

{{/*
Selector labels
*/}}
{{- define "yourls-nginx.selectorLabels" -}}
app.kubernetes.io/name: {{ include "yourls-nginx.name" . }}
app.kubernetes.io/instance: {{ .Release.Name }}
{{- end }}

{{/*
Secret name used for chart-managed credentials.
*/}}
{{- define "yourls-nginx.secretName" -}}
{{- printf "%s-secret" (include "yourls-nginx.fullname" .) }}
{{- end }}

{{/*
Fetch a previously-generated value from the existing chart-managed Secret, if any.
Used so that random values (cookiekey, auto-generated admin password) survive
"helm upgrade" instead of rotating on every release, which would otherwise
invalidate admin login cookies and previously-issued passwords.
Usage: {{ include "yourls-nginx.existingSecretValue" (list . "cookiekey") }}
Returns an empty string on first install (no Secret exists yet) or when
running "helm template" without cluster access.
*/}}
{{- define "yourls-nginx.existingSecretValue" -}}
{{- $ctx := index . 0 -}}
{{- $key := index . 1 -}}
{{- $secret := lookup "v1" "Secret" $ctx.Release.Namespace (include "yourls-nginx.secretName" $ctx) -}}
{{- if $secret -}}
{{- $value := index $secret.data $key -}}
{{- if $value -}}
{{- $value | b64dec -}}
{{- end -}}
{{- end -}}
{{- end }}