add json encode method for deployments and workloads

Signed-off-by: mariobassem <[email protected]>

3bot/zos/deployment.v

@@ -1,6 +1,7 @@
 module zos
 
 import crypto.md5
+import json
 
 pub struct SignatureRequest {
 pub mut:
@@ -132,3 +133,13 @@ pub fn (mut d Deployment) add_signature(twin u32, signature string) {
 		signature_type: 'sr25519'
 	}
 }
+
+pub fn (mut d Deployment) json_encode() !string {
+	mut encoded_workloads := []string{}
+	for mut w in d.workloads {
+		encoded_workloads << w.json_encode()!
+	}
+
+	workloads := '[${encoded_workloads.join(',')}]'
+	return '{"version":${d.version},"twin_id":${d.twin_id},"contract_id":${d.contract_id},"expiration":${d.expiration},"metadata":"${d.metadata}","description":"${d.description}","workloads":${workloads},"signature_requirement":${json.encode(d.signature_requirement)}}'
+}

3bot/zos/workload.v

@@ -103,6 +103,10 @@ pub fn (mut workload Workload) challenge() string {
 	return out.join('')
 }
 
+pub fn (mut w Workload) json_encode() !string {
+	return '{"version":${w.version},"name":"${w.name}","type":"${w.type_}","data":${w.data},"metadata":"${w.metadata}","description":"${w.description}"}'
+}
+
 type WorkloadData = Zdb | Zmachine | Zmount | Znet
 type WorkloadDataResult = ZdbResult | ZmachineResult | ZmountResult