use partials for data rows in organisation timelines

layouts/partials/cv/organisation/get_role_colour.html

@@ -0,0 +1,50 @@
+<!--
+    Renders a role's class (i.e. colour based on paid/unpaid).
+
+    @params end_date    The end date of the role, or undefined if the role is ongoing.
+    @params is_paid Whether the role is paid or not.
+-->
+
+<!-- Validation -->
+
+{{- if ( not ( isset . "end_date" ) ) -}}
+  {{- errorf "No end date passed" -}}
+{{- end -}}
+
+{{- if ( not ( isset . "is_paid" ) ) -}}
+  {{- errorf "No 'is_paid' passed" -}}
+{{- end -}}
+
+
+<!-- Variable Assignment -->
+
+{{- $end_date := .end_date -}}
+{{- $is_paid := .is_paid -}}
+
+
+<!-- Variable Initialisation -->
+
+{{- $unpaid_past := "#FFFFF0" -}}
+{{- $paid_past := "#FCFCA6" -}}
+{{- $unpaid_current := "#BBBBB0" -}}
+{{- $paid_current := "#BCBC7E" -}}
+{{- $colour := "" -}}
+
+
+<!-- Rendering -->
+
+{{- if $end_date -}}
+  {{- if $is_paid -}}
+    {{- $colour = $paid_past -}}
+  {{- else -}}
+    {{- $colour = $unpaid_past -}}
+  {{- end -}}
+{{- else -}}
+  {{- if $is_paid -}}
+    {{- $colour = $paid_current -}}
+  {{- else -}}
+    {{- $colour = $unpaid_current -}}
+  {{- end -}}
+{{- end }}
+
+{{- return $colour -}}