organize essential APIs into platform, workflow and pkg folders (#337)

Add more logic to the way code is organized.

	/pkg -- library code not directly connected to micromdm
	/mdm -- packages meant for the services devices interract with. The MDM protocol.
	/dep -- DEP API and related packages.
	/platform -- Core APIs the server provides. Commands API, Devices API, queue, pubsub etc.
	/workflow -- Packages/API that build on top of platform. Today that's the webhook package.
		     Depending on what ends up here, the workflow folder might become its own repository.

platform/queue/internal/devicecommandproto/device_command.go

@@ -0,0 +1,3 @@
+package devicecommandproto
+
+//go:generate protoc --go_out=. device_command.proto

platform/queue/internal/devicecommandproto/device_command.pb.go

@@ -0,0 +1,181 @@
+// Code generated by protoc-gen-go. DO NOT EDIT.
+// source: device_command.proto
+
+/*
+Package devicecommandproto is a generated protocol buffer package.
+
+It is generated from these files:
+	device_command.proto
+
+It has these top-level messages:
+	Command
+	DeviceCommand
+*/
+package devicecommandproto
+
+import proto "github.com/golang/protobuf/proto"
+import fmt "fmt"
+import math "math"
+
+// Reference imports to suppress errors if they are not otherwise used.
+var _ = proto.Marshal
+var _ = fmt.Errorf
+var _ = math.Inf
+
+// This is a compile-time assertion to ensure that this generated file
+// is compatible with the proto package it is being compiled against.
+// A compilation error at this line likely means your copy of the
+// proto package needs to be updated.
+const _ = proto.ProtoPackageIsVersion2 // please upgrade the proto package
+
+type Command struct {
+	Uuid           string `protobuf:"bytes,1,opt,name=uuid" json:"uuid,omitempty"`
+	Payload        []byte `protobuf:"bytes,2,opt,name=payload,proto3" json:"payload,omitempty"`
+	CreatedAt      int64  `protobuf:"varint,3,opt,name=created_at,json=createdAt" json:"created_at,omitempty"`
+	LastSentAt     int64  `protobuf:"varint,4,opt,name=last_sent_at,json=lastSentAt" json:"last_sent_at,omitempty"`
+	Acknowledged   int64  `protobuf:"varint,5,opt,name=acknowledged" json:"acknowledged,omitempty"`
+	TimesSent      int64  `protobuf:"varint,6,opt,name=times_sent,json=timesSent" json:"times_sent,omitempty"`
+	LastStatus     string `protobuf:"bytes,7,opt,name=last_status,json=lastStatus" json:"last_status,omitempty"`
+	FailureMessage []byte `protobuf:"bytes,8,opt,name=failure_message,json=failureMessage,proto3" json:"failure_message,omitempty"`
+}
+
+func (m *Command) Reset()                    { *m = Command{} }
+func (m *Command) String() string            { return proto.CompactTextString(m) }
+func (*Command) ProtoMessage()               {}
+func (*Command) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{0} }
+
+func (m *Command) GetUuid() string {
+	if m != nil {
+		return m.Uuid
+	}
+	return ""
+}
+
+func (m *Command) GetPayload() []byte {
+	if m != nil {
+		return m.Payload
+	}
+	return nil
+}
+
+func (m *Command) GetCreatedAt() int64 {
+	if m != nil {
+		return m.CreatedAt
+	}
+	return 0
+}
+
+func (m *Command) GetLastSentAt() int64 {
+	if m != nil {
+		return m.LastSentAt
+	}
+	return 0
+}
+
+func (m *Command) GetAcknowledged() int64 {
+	if m != nil {
+		return m.Acknowledged
+	}
+	return 0
+}
+
+func (m *Command) GetTimesSent() int64 {
+	if m != nil {
+		return m.TimesSent
+	}
+	return 0
+}
+
+func (m *Command) GetLastStatus() string {
+	if m != nil {
+		return m.LastStatus
+	}
+	return ""
+}
+
+func (m *Command) GetFailureMessage() []byte {
+	if m != nil {
+		return m.FailureMessage
+	}
+	return nil
+}
+
+type DeviceCommand struct {
+	DeviceUdid string     `protobuf:"bytes,1,opt,name=device_udid,json=deviceUdid" json:"device_udid,omitempty"`
+	Commands   []*Command `protobuf:"bytes,2,rep,name=commands" json:"commands,omitempty"`
+	Completed  []*Command `protobuf:"bytes,3,rep,name=completed" json:"completed,omitempty"`
+	Failed     []*Command `protobuf:"bytes,4,rep,name=failed" json:"failed,omitempty"`
+	NotNow     []*Command `protobuf:"bytes,5,rep,name=not_now,json=notNow" json:"not_now,omitempty"`
+}
+
+func (m *DeviceCommand) Reset()                    { *m = DeviceCommand{} }
+func (m *DeviceCommand) String() string            { return proto.CompactTextString(m) }
+func (*DeviceCommand) ProtoMessage()               {}
+func (*DeviceCommand) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{1} }
+
+func (m *DeviceCommand) GetDeviceUdid() string {
+	if m != nil {
+		return m.DeviceUdid
+	}
+	return ""
+}
+
+func (m *DeviceCommand) GetCommands() []*Command {
+	if m != nil {
+		return m.Commands
+	}
+	return nil
+}
+
+func (m *DeviceCommand) GetCompleted() []*Command {
+	if m != nil {
+		return m.Completed
+	}
+	return nil
+}
+
+func (m *DeviceCommand) GetFailed() []*Command {
+	if m != nil {
+		return m.Failed
+	}
+	return nil
+}
+
+func (m *DeviceCommand) GetNotNow() []*Command {
+	if m != nil {
+		return m.NotNow
+	}
+	return nil
+}
+
+func init() {
+	proto.RegisterType((*Command)(nil), "devicecommandproto.Command")
+	proto.RegisterType((*DeviceCommand)(nil), "devicecommandproto.DeviceCommand")
+}
+
+func init() { proto.RegisterFile("device_command.proto", fileDescriptor0) }
+
+var fileDescriptor0 = []byte{
+	// 324 bytes of a gzipped FileDescriptorProto
+	0x1f, 0x8b, 0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02, 0xff, 0x8c, 0x90, 0x41, 0x4b, 0xeb, 0x40,
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+	0xad, 0xd4, 0x6a, 0xb9, 0xdd, 0x19, 0x36, 0x88, 0x9e, 0x06, 0xe8, 0xd8, 0xe2, 0x2d, 0x86, 0xf4,
+	0xda, 0x03, 0x44, 0x18, 0x74, 0x5d, 0xad, 0x44, 0x94, 0x45, 0xf9, 0xa4, 0x70, 0xdf, 0x28, 0x20,
+	0xdd, 0xca, 0xd7, 0xc6, 0x48, 0x25, 0xe2, 0x2c, 0xca, 0x67, 0xc5, 0xe1, 0x17, 0xff, 0x03, 0x54,
+	0x3b, 0x92, 0x4c, 0xaa, 0x94, 0x2c, 0x92, 0x2c, 0xca, 0x93, 0x62, 0x12, 0xc8, 0x9a, 0x31, 0x83,
+	0x59, 0x23, 0x2d, 0x97, 0x96, 0x34, 0xf7, 0x81, 0x81, 0x0b, 0x40, 0xcf, 0xee, 0x49, 0xf3, 0x9a,
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+	0xa6, 0xdb, 0x51, 0xd9, 0x92, 0xb5, 0x72, 0x43, 0x62, 0xec, 0x9e, 0xf1, 0x3b, 0xe0, 0x5b, 0x4f,
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+	0x02, 0x1e, 0x3d, 0xa8, 0x5a, 0xe1, 0x25, 0x8c, 0x83, 0x4a, 0x2b, 0xe2, 0x2c, 0xc9, 0xa7, 0xe7,
+	0xff, 0x96, 0xdf, 0x0d, 0x2f, 0xc3, 0xbe, 0xe2, 0x18, 0xc6, 0x2b, 0x98, 0x54, 0xa6, 0xdd, 0x36,
+	0xc4, 0xa4, 0x44, 0x72, 0x7a, 0xf2, 0x33, 0x8d, 0x2b, 0x18, 0xf5, 0x87, 0x93, 0x12, 0x83, 0xd3,
+	0x73, 0x21, 0x8a, 0x17, 0x90, 0x6a, 0xc3, 0xa5, 0x36, 0x7b, 0x31, 0xfc, 0xc1, 0x94, 0x36, 0x7c,
+	0x67, 0xf6, 0x8f, 0x23, 0x87, 0x57, 0x1f, 0x01, 0x00, 0x00, 0xff, 0xff, 0x83, 0x8d, 0x73, 0x78,
+	0x4c, 0x02, 0x00, 0x00,
+}

platform/queue/internal/devicecommandproto/device_command.proto

@@ -0,0 +1,25 @@
+syntax = "proto3";
+
+package devicecommandproto;
+
+message Command {
+    string uuid = 1;
+    bytes payload = 2;
+
+    int64 created_at = 3;
+    int64 last_sent_at = 4;
+    int64 acknowledged = 5;
+
+    int64 times_sent = 6;
+
+    string last_status = 7;
+    bytes failure_message = 8;
+}
+
+message DeviceCommand {
+    string device_udid = 1;
+    repeated Command commands = 2;
+    repeated Command completed = 3;
+    repeated Command failed = 4;
+    repeated Command not_now = 5;
+}