Build and Run

//  Purpose-- provide an overview of available crud  and sync functionality
//
// Get the database (and create it if it doesn't exist)
CBLError err{};
CBLDatabase* database = CBLDatabase_Open(FLSTR("mydb"), NULL, &err);
if(!database) {
    // Error handling.  For brevity, this is truncated in the rest of the snippet
    // and omitted in other doc code snippets
    fprintf(stderr, "Error opening database (%d / %d)\n", err.domain, err.code);
    FLSliceResult msg = CBLError_Message(&err);
    fprintf(stderr, "%.*s\n", (int)msg.size, (const char *)msg.buf);
    FLSliceResult_Release(msg);
    return;
}

// All CRUD operations must be carried out via a collection (for backwards compatibility
// the old CBLDatabase_ API will automatically use the default collection).  This is a quick
// API to explicitly get the default collection.
CBLCollection* collection = CBLDatabase_DefaultCollection(database, &err);

// The lack of 'const' indicates this document is mutable
// Create a new document (i.e. a record) in the database
CBLDocument* mutableDoc = CBLDocument_Create();
FLMutableDict properties = CBLDocument_MutableProperties(mutableDoc);
FLMutableDict_SetFloat(properties, FLSTR("version"), 3.0f);

// Save it to the database
if(!CBLCollection_SaveDocument(collection, mutableDoc, &err)) {
    // Failed to save, do error handling as above
    return;
}

// Since we will release the document, make a copy of the ID since it
// is an internal pointer.  Whenever we create or get an FLSliceResult
// or FLStringResult we will need to free it later too!
FLString id = CBLDocument_ID(mutableDoc);
CBLDocument_Release(mutableDoc);

// Update a document
mutableDoc = CBLCollection_GetMutableDocument(collection, id, &err);
if(!mutableDoc) {
    // Failed to retrieve, do error handling as above.  NOTE: error code 0 simply means
    // the document does not exist.
    return;
}

properties = CBLDocument_MutableProperties(mutableDoc);
FLMutableDict_SetString(properties, FLSTR("language"), FLSTR("C"));
if(!CBLCollection_SaveDocument(collection, mutableDoc, &err)) {
    // Failed to save, do error handling as above
    return;
}

// Note const here, means readonly
const CBLDocument* docAgain = CBLCollection_GetDocument(collection, id, &err);
if(!docAgain) {
    // Failed to retrieve, do error handling as above.  NOTE: error code 0 simply means
    // the document does not exist.
    return;
}

// No copy this time, so no release later (notice it is not FLStringResult this time)
FLString retrievedID = CBLDocument_ID(docAgain);
FLDict retrievedProperties = CBLDocument_Properties(docAgain);
FLString retrievedLanguage = FLValue_AsString(FLDict_Get(retrievedProperties, FLSTR("language")));
printf("Document ID :: %.*s\n", (int)retrievedID.size, (const char *)retrievedID.buf);
printf("Learning %.*s\n", (int)retrievedLanguage.size, (const char *)retrievedLanguage.buf);

CBLDocument_Release(mutableDoc);
CBLDocument_Release(docAgain);

// Create a query to fetch documents of type SDK
int errorPos;
CBLQuery* query = CBLDatabase_CreateQuery(database, kCBLN1QLLanguage, FLSTR("SELECT * FROM _ WHERE type = \"SDK\""), &errorPos, &err);
if(!query) {
    // Failed to create query, do error handling as above
    // Note that errorPos will contain the position in the N1QL string
    // that the parse failed, if applicable
    return;
}

CBLResultSet* result = CBLQuery_Execute(query, &err);
if(!result) {
    // Failed to run query, do error handling as above
    return;
}

CBLResultSet_Release(result);
CBLQuery_Release(query);

// Create replicator to push and pull changes to and from the cloud
CBLEndpoint* targetEndpoint = CBLEndpoint_CreateWithURL(FLSTR("ws://localhost:4984/getting-started-db"), &err);
if(!targetEndpoint) {
    // Failed to create endpoint, do error handling as above
    return;
}

CBLReplicatorConfiguration replConfig;
CBLAuthenticator* basicAuth = CBLAuth_CreatePassword(FLSTR("john"), FLSTR("pass"));
memset(&replConfig, 0, sizeof(replConfig));
replConfig.database = database;
replConfig.endpoint = targetEndpoint;
replConfig.authenticator = basicAuth;

CBLReplicator* replicator = CBLReplicator_Create(&replConfig, &err);
CBLAuth_Free(basicAuth);
CBLEndpoint_Free(targetEndpoint);
if(!replicator) {
    // Failed to create replicator, do error handling as above
    return;
}

// Assume a function like the simple following
//
// static void getting_started_change_listener(void* context, CBLReplicator* repl, const CBLReplicatorStatus* status) {
//     if(status->error.code != 0) {
//         printf("Error %d / %d\n", status->error.domain, status->error.code);
//     }
// }

CBLListenerToken* token = CBLReplicator_AddChangeListener(replicator, getting_started_change_listener, NULL);

CBLReplicator_Start(replicator, false);

// Later, stop and release the replicator