Module functionality

This allows zones including records to be defined as individual modules
when using this provider as a source. The logic and data structure is
mostly taken over from mineiros-io/terraform-aws-route53, allowing the
management of PowerDNS zones using a similar representation as Route53
ones.

Signed-off-by: Georg Pfuetzenreuter <mail@georg-pfuetzenreuter.net>

Author: tacerus

main.tf

@@ -0,0 +1,47 @@
+locals {
+	zones = var.name == null ? [] : try(tolist(var.name), [tostring(var.name)], [])
+}
+
+resource "powerdns_zone" "zone" {
+	for_each = toset(local.zones)
+	name = each.value
+	kind = "Native"
+}
+
+locals {
+	records_expanded = {
+		for i, record in var.records : join("-", compact([
+			lower(record.type),
+			try(lower(record.name), ""),
+			])) => {
+			type = record.type
+			name = try(record.name, "")
+			ttl  = try(record.ttl, null)
+			idx  = i
+		}
+	}
+
+	records_by_name = {
+		for product in setproduct(local.zones, keys(local.records_expanded)) : "${product[1]}-${product[0]}" => {
+			zone = powerdns_zone.zone[product[0]].name
+			type = local.records_expanded[product[1]].type
+			name = local.records_expanded[product[1]].name
+			ttl  = local.records_expanded[product[1]].ttl
+			idx  = local.records_expanded[product[1]].idx
+		}
+	}
+
+	records = local.records_by_name
+}
+
+resource "powerdns_record" "record" {
+	for_each = local.records
+	name = each.value.name == "" ? each.value.zone : join(".", [each.value.name, each.value.zone])
+	zone = each.value.zone
+	type = each.value.type
+	ttl  = each.value.ttl
+	records = can(var.records[each.value.idx].records) ? [for r in var.records[each.value.idx].records :
+		each.value.type == "TXT" && length(regexall("(\\\"\\\")", r)) == 0 ?
+		join("\"\"", compact(split("{SPLITHERE}", replace(r, "/(.{255})/", "$1{SPLITHERE}")))) : r
+	] : null
+}

variables.tf

@@ -0,0 +1,12 @@
+variable "name" {
+  description = "Name of the zone or list of zone names."
+  type        = any
+
+  default = null
+}
+
+variable "records" {
+  description = "List of records to create in the zone."
+  type        = any
+  default = []
+}