func resourceCloudStackEgressFirewallRead()

in cloudstack/resource_cloudstack_egress_firewall.go [260:421]
110 lines of code
27 McCabe index (conditional complexity)

func resourceCloudStackEgressFirewallRead(d *schema.ResourceData, meta interface{}) error {
	cs := meta.(*cloudstack.CloudStackClient)

	// Get all the rules from the running environment
	p := cs.Firewall.NewListEgressFirewallRulesParams()
	p.SetNetworkid(d.Id())
	p.SetListall(true)

	l, err := cs.Firewall.ListEgressFirewallRules(p)
	if err != nil {
		return err
	}

	// Make a map of all the rules so we can easily find a rule
	ruleMap := make(map[string]*cloudstack.EgressFirewallRule, l.Count)
	for _, r := range l.EgressFirewallRules {
		ruleMap[r.Id] = r
	}

	// Create an empty schema.Set to hold all rules
	rules := resourceCloudStackEgressFirewall().Schema["rule"].ZeroValue().(*schema.Set)

	// Read all rules that are configured
	if rs := d.Get("rule").(*schema.Set); rs.Len() > 0 {
		for _, rule := range rs.List() {
			rule := rule.(map[string]interface{})
			uuids := rule["uuids"].(map[string]interface{})

			if rule["protocol"].(string) == "icmp" {
				id, ok := uuids["icmp"]
				if !ok {
					continue
				}

				// Get the rule
				r, ok := ruleMap[id.(string)]
				if !ok {
					delete(uuids, "icmp")
					continue
				}

				// Delete the known rule so only unknown rules remain in the ruleMap
				delete(ruleMap, id.(string))

				// Create a set with all CIDR's
				cidrs := &schema.Set{F: schema.HashString}
				for _, cidr := range strings.Split(r.Cidrlist, ",") {
					cidrs.Add(cidr)
				}

				// Update the values
				rule["protocol"] = r.Protocol
				rule["icmp_type"] = r.Icmptype
				rule["icmp_code"] = r.Icmpcode
				rule["cidr_list"] = cidrs
				rules.Add(rule)
			}

			// If protocol is not ICMP, loop through all ports
			if rule["protocol"].(string) != "icmp" && strings.ToLower(rule["protocol"].(string)) != "all" {
				if ps := rule["ports"].(*schema.Set); ps.Len() > 0 {

					// Create an empty schema.Set to hold all ports
					ports := &schema.Set{F: schema.HashString}

					// Loop through all ports and retrieve their info
					for _, port := range ps.List() {
						id, ok := uuids[port.(string)]
						if !ok {
							continue
						}

						// Get the rule
						r, ok := ruleMap[id.(string)]
						if !ok {
							delete(uuids, port.(string))
							continue
						}

						// Delete the known rule so only unknown rules remain in the ruleMap
						delete(ruleMap, id.(string))

						// Create a set with all CIDR's
						cidrs := &schema.Set{F: schema.HashString}
						for _, cidr := range strings.Split(r.Cidrlist, ",") {
							cidrs.Add(cidr)
						}

						// Update the values
						rule["protocol"] = r.Protocol
						rule["cidr_list"] = cidrs
						ports.Add(port)
					}

					// If there is at least one port found, add this rule to the rules set
					if ports.Len() > 0 {
						rule["ports"] = ports
						rules.Add(rule)
					}
				}
			}
			if strings.ToLower(rule["protocol"].(string)) == "all" {
				id, ok := uuids["all"]
				if !ok {
					continue
				}

				// Get the rule
				r, ok := ruleMap[id.(string)]
				if !ok {
					delete(uuids, "all")
					continue
				}

				// Delete the known rule so only unknown rules remain in the ruleMap
				delete(ruleMap, id.(string))

				// Create a set with all CIDR's
				if _, ok := rule["cidr_list"]; ok {
					cidrs := &schema.Set{F: schema.HashString}
					for _, cidr := range strings.Split(r.Cidrlist, ",") {
						cidrs.Add(cidr)
					}
					rule["cidr_list"] = cidrs
				}

				// Update the values
				rule["protocol"] = r.Protocol
				rules.Add(rule)
			}
		}
	}

	// If this is a managed firewall, add all unknown rules into a single dummy rule
	managed := d.Get("managed").(bool)
	if managed && len(ruleMap) > 0 {
		for uuid := range ruleMap {
			// We need to create and add a dummy value to a schema.Set as the
			// cidr_list is a required field and thus needs a value
			cidrs := &schema.Set{F: schema.HashString}
			cidrs.Add(uuid)

			// Make a dummy rule to hold the unknown UUID
			rule := map[string]interface{}{
				"cidr_list": uuid,
				"protocol":  uuid,
				"uuids":     map[string]interface{}{uuid: uuid},
			}

			// Add the dummy rule to the rules set
			rules.Add(rule)
		}
	}

	if rules.Len() > 0 {
		d.Set("rule", rules)
	} else if !managed {
		d.SetId("")
	}

	return nil
}