Generate more realistic resource ids

api/handlers/middleware/authentication.go

@@ -75,8 +75,7 @@ func requestToResourceId(c *gin.Context) string {
 
 	isFeed := c.Request.Header.Get("A-Im") == "Incremental Feed"
 	if resourceType == "pkranges" && isFeed {
-		// CosmosSDK replaces '/' with '-' in resource id requests
+		resourceId = collId
-		resourceId = strings.Replace(collId, "-", "/", -1)
 	}
 
 	return resourceId

api/handlers/partition_key_ranges.go

@@ -6,6 +6,7 @@ import (
 
 	"github.com/gin-gonic/gin"
 	repositorymodels "github.com/pikami/cosmium/internal/repository_models"
+	"github.com/pikami/cosmium/internal/resourceid"
 )
 
 func (h *Handlers) GetPartitionKeyRanges(c *gin.Context) {
@@ -31,8 +32,9 @@ func (h *Handlers) GetPartitionKeyRanges(c *gin.Context) {
 			collectionRid = collection.ResourceID
 		}
 
+		rid := resourceid.NewCombined(collectionRid, resourceid.New(resourceid.ResourceTypePartitionKeyRange))
 		c.IndentedJSON(http.StatusOK, gin.H{
-			"_rid":               collectionRid,
+			"_rid":               rid,
 			"_count":             len(partitionKeyRanges),
 			"PartitionKeyRanges": partitionKeyRanges,
 		})

internal/repositories/collections.go

@@ -50,6 +50,10 @@ func (r *DataRepository) DeleteCollection(databaseId string, collectionId string
 	}
 
 	delete(r.storeState.Collections[databaseId], collectionId)
+	delete(r.storeState.Documents[databaseId], collectionId)
+	delete(r.storeState.Triggers[databaseId], collectionId)
+	delete(r.storeState.StoredProcedures[databaseId], collectionId)
+	delete(r.storeState.UserDefinedFunctions[databaseId], collectionId)
 
 	return repositorymodels.StatusOk
 }
@@ -71,7 +75,7 @@ func (r *DataRepository) CreateCollection(databaseId string, newCollection repos
 	newCollection = structhidrators.Hidrate(newCollection).(repositorymodels.Collection)
 
 	newCollection.TimeStamp = time.Now().Unix()
-	newCollection.ResourceID = resourceid.NewCombined(database.ResourceID, resourceid.New())
+	newCollection.ResourceID = resourceid.NewCombined(database.ResourceID, resourceid.New(resourceid.ResourceTypeCollection))
 	newCollection.ETag = fmt.Sprintf("\"%s\"", uuid.New())
 	newCollection.Self = fmt.Sprintf("dbs/%s/colls/%s/", database.ResourceID, newCollection.ResourceID)
 

internal/repositories/databases.go

@@ -37,6 +37,11 @@ func (r *DataRepository) DeleteDatabase(id string) repositorymodels.RepositorySt
 	}
 
 	delete(r.storeState.Databases, id)
+	delete(r.storeState.Collections, id)
+	delete(r.storeState.Documents, id)
+	delete(r.storeState.Triggers, id)
+	delete(r.storeState.StoredProcedures, id)
+	delete(r.storeState.UserDefinedFunctions, id)
 
 	return repositorymodels.StatusOk
 }
@@ -50,7 +55,7 @@ func (r *DataRepository) CreateDatabase(newDatabase repositorymodels.Database) (
 	}
 
 	newDatabase.TimeStamp = time.Now().Unix()
-	newDatabase.ResourceID = resourceid.New()
+	newDatabase.ResourceID = resourceid.New(resourceid.ResourceTypeDatabase)
 	newDatabase.ETag = fmt.Sprintf("\"%s\"", uuid.New())
 	newDatabase.Self = fmt.Sprintf("dbs/%s/", newDatabase.ResourceID)
 

internal/repositories/documents.go

@@ -95,7 +95,7 @@ func (r *DataRepository) CreateDocument(databaseId string, collectionId string,
 	}
 
 	document["_ts"] = time.Now().Unix()
-	document["_rid"] = resourceid.NewCombined(database.ResourceID, collection.ResourceID, resourceid.New())
+	document["_rid"] = resourceid.NewCombined(collection.ResourceID, resourceid.New(resourceid.ResourceTypeDocument))
 	document["_etag"] = fmt.Sprintf("\"%s\"", uuid.New())
 	document["_self"] = fmt.Sprintf("dbs/%s/colls/%s/docs/%s/", database.ResourceID, collection.ResourceID, document["_rid"])
 

internal/repositories/partition_key_ranges.go

@@ -26,7 +26,7 @@ func (r *DataRepository) GetPartitionKeyRanges(databaseId string, collectionId s
 		timestamp = collection.TimeStamp
 	}
 
-	pkrResourceId := resourceid.NewCombined(databaseRid, collectionRid, resourceid.New())
+	pkrResourceId := resourceid.NewCombined(collectionRid, resourceid.New(resourceid.ResourceTypePartitionKeyRange))
 	pkrSelf := fmt.Sprintf("dbs/%s/colls/%s/pkranges/%s/", databaseRid, collectionRid, pkrResourceId)
 	etag := fmt.Sprintf("\"%s\"", uuid.New())
 

internal/repositories/stored_procedures.go

@@ -81,7 +81,7 @@ func (r *DataRepository) CreateStoredProcedure(databaseId string, collectionId s
 	}
 
 	sp.TimeStamp = time.Now().Unix()
-	sp.ResourceID = resourceid.NewCombined(database.ResourceID, collection.ResourceID, resourceid.New())
+	sp.ResourceID = resourceid.NewCombined(collection.ResourceID, resourceid.New(resourceid.ResourceTypeStoredProcedure))
 	sp.ETag = fmt.Sprintf("\"%s\"", uuid.New())
 	sp.Self = fmt.Sprintf("dbs/%s/colls/%s/sprocs/%s/", database.ResourceID, collection.ResourceID, sp.ResourceID)
 

internal/repositories/triggers.go

@@ -81,7 +81,7 @@ func (r *DataRepository) CreateTrigger(databaseId string, collectionId string, t
 	}
 
 	trigger.TimeStamp = time.Now().Unix()
-	trigger.ResourceID = resourceid.NewCombined(database.ResourceID, collection.ResourceID, resourceid.New())
+	trigger.ResourceID = resourceid.NewCombined(collection.ResourceID, resourceid.New(resourceid.ResourceTypeTrigger))
 	trigger.ETag = fmt.Sprintf("\"%s\"", uuid.New())
 	trigger.Self = fmt.Sprintf("dbs/%s/colls/%s/triggers/%s/", database.ResourceID, collection.ResourceID, trigger.ResourceID)
 

internal/repositories/user_defined_functions.go

@@ -81,7 +81,7 @@ func (r *DataRepository) CreateUserDefinedFunction(databaseId string, collection
 	}
 
 	udf.TimeStamp = time.Now().Unix()
-	udf.ResourceID = resourceid.NewCombined(database.ResourceID, collection.ResourceID, resourceid.New())
+	udf.ResourceID = resourceid.NewCombined(collection.ResourceID, resourceid.New(resourceid.ResourceTypeUserDefinedFunction))
 	udf.ETag = fmt.Sprintf("\"%s\"", uuid.New())
 	udf.Self = fmt.Sprintf("dbs/%s/colls/%s/udfs/%s/", database.ResourceID, collection.ResourceID, udf.ResourceID)
 

internal/resourceid/resourceid.go

@@ -3,32 +3,76 @@ package resourceid
 import (
 	"encoding/base64"
 	"math/rand"
+	"strings"
 
 	"github.com/google/uuid"
 )
 
-func New() string {
+type ResourceType int
-	id := uuid.New().ID()
-	idBytes := uintToBytes(id)
 
+const (
+	ResourceTypeDatabase ResourceType = iota
+	ResourceTypeCollection
+	ResourceTypeDocument
+	ResourceTypeStoredProcedure
+	ResourceTypeTrigger
+	ResourceTypeUserDefinedFunction
+	ResourceTypeConflict
+	ResourceTypePartitionKeyRange
+	ResourceTypeSchema
+)
+
+func New(resourceType ResourceType) string {
+	var idBytes []byte
+	switch resourceType {
+	case ResourceTypeDatabase:
+		idBytes = randomBytes(4)
+	case ResourceTypeCollection:
+		idBytes = randomBytes(4)
 		// first byte should be bigger than 0x80 for collection ids
 		// clients classify this id as "user" otherwise
 		if (idBytes[0] & 0x80) <= 0 {
 			idBytes[0] = byte(rand.Intn(0x80) + 0x80)
 		}
+	case ResourceTypeDocument:
+		idBytes = randomBytes(8)
+		idBytes[7] = byte(rand.Intn(0x10)) // Upper 4 bits = 0
+	case ResourceTypeStoredProcedure:
+		idBytes = randomBytes(8)
+		idBytes[7] = byte(rand.Intn(0x10)) | 0x08 // Upper 4 bits = 0x08
+	case ResourceTypeTrigger:
+		idBytes = randomBytes(8)
+		idBytes[7] = byte(rand.Intn(0x10)) | 0x07 // Upper 4 bits = 0x07
+	case ResourceTypeUserDefinedFunction:
+		idBytes = randomBytes(8)
+		idBytes[7] = byte(rand.Intn(0x10)) | 0x06 // Upper 4 bits = 0x06
+	case ResourceTypeConflict:
+		idBytes = randomBytes(8)
+		idBytes[7] = byte(rand.Intn(0x10)) | 0x04 // Upper 4 bits = 0x04
+	case ResourceTypePartitionKeyRange:
+		// we don't do partitions yet, so just use a fixed id
+		idBytes = []byte{0x69, 0x69, 0x69, 0x69, 0x69, 0x69, 0x69, 0x50}
+	case ResourceTypeSchema:
+		idBytes = randomBytes(8)
+		idBytes[7] = byte(rand.Intn(0x10)) | 0x09 // Upper 4 bits = 0x09
+	default:
+		idBytes = randomBytes(4)
+	}
 
-	return base64.StdEncoding.EncodeToString(idBytes)
+	encoded := base64.StdEncoding.EncodeToString(idBytes)
+	return strings.ReplaceAll(encoded, "/", "-")
 }
 
 func NewCombined(ids ...string) string {
 	combinedIdBytes := make([]byte, 0)
 
 	for _, id := range ids {
-		idBytes, _ := base64.StdEncoding.DecodeString(id)
+		idBytes, _ := base64.StdEncoding.DecodeString(strings.ReplaceAll(id, "-", "/"))
 		combinedIdBytes = append(combinedIdBytes, idBytes...)
 	}
 
-	return base64.StdEncoding.EncodeToString(combinedIdBytes)
+	encoded := base64.StdEncoding.EncodeToString(combinedIdBytes)
+	return strings.ReplaceAll(encoded, "/", "-")
 }
 
 func uintToBytes(id uint32) []byte {
@@ -39,3 +83,13 @@ func uintToBytes(id uint32) []byte {
 
 	return buf
 }
+
+func randomBytes(count int) []byte {
+	buf := make([]byte, count)
+	for i := 0; i < count; i += 4 {
+		id := uuid.New().ID()
+		idBytes := uintToBytes(id)
+		copy(buf[i:], idBytes)
+	}
+	return buf
+}