Setup c_playground

Author: Nao-ris

c_playground/CMakeLists.txt

@@ -0,0 +1,9 @@
+cmake_minimum_required(VERSION 3.15)
+
+project(c_playground)
+
+include_directories(${CMAKE_SOURCE_DIR}/../libcblite/include)
+
+add_executable(Main main.c)
+
+target_link_libraries(Main PUBLIC ${CMAKE_SOURCE_DIR}/../libcblite/lib/macos/libcblite.3.dylib)

c_playground/doc.json

@@ -0,0 +1,22 @@
+{
+    "name":"Sam",
+    "contacts":[
+        {
+        "type":"primary",
+        "address":{"street":"1 St","city":"San Pedro","state":"CA"},
+        "phones":[
+            {"type":"home","number":"310-123-4567"},
+            {"type":"mobile","number":"310-123-6789"}
+        ]
+        },
+        {
+        "type":"secondary",
+        "address":{"street":"5 St","city":"Seattle","state":"WA"},
+        "phones":[
+            {"type":"home","number":"206-123-4567"},
+            {"type":"mobile","number":"206-123-6789"}
+        ]
+        }
+    ],
+    "likes":["soccer","travel"]
+}

c_playground/main.c

@@ -0,0 +1,144 @@
+#include <assert.h>
+#include <stdio.h>
+#include <string.h>
+
+#include <cbl/CBLCollection.h>
+#include <cbl/CBLDatabase.h>
+#include <cbl/CBLDocument.h>
+#include <cbl/CBLLog.h>
+#include <cbl/CBLQuery.h>
+
+const char* DOMAINS[] = { "Database", "Query", "Replicator", "Network" };
+const char* LEVEL_PREFIX[] = { "((", "_", "", "WARNING: ", "***ERROR: " };
+const char* LEVEL_SUFFIX[] = { "))", "_", "", "", " ***" };
+
+void log_callback(CBLLogDomain domain, CBLLogLevel level, FLString message) {
+    printf(
+        "CBL %s: %s%s%s\n",
+        DOMAINS[domain],
+        LEVEL_PREFIX[level],
+        (char*) message.buf,
+        LEVEL_SUFFIX[level]
+    );
+}
+
+int main(void) {
+    CBLLog_SetCallbackLevel(kCBLLogVerbose);
+    CBLLog_SetConsoleLevel(kCBLLogVerbose);
+    CBLLog_SetCallback(log_callback);
+
+    // Open database
+    CBLError error;
+    CBLDatabaseConfiguration config = {FLSTR("/tmp")};
+    CBLDatabase* db = CBLDatabase_Open(FLSTR("my_db"), &config, &error);
+    assert(db);
+
+    CBLCollection* default_collection = CBLDatabase_DefaultCollection(db, &error);
+    assert(default_collection);
+
+    // Create a document
+    CBLDocument* doc = CBLDocument_Create();
+
+    FILE* fp = fopen("doc.json", "r");
+
+    char json_format[4096];
+    int len = fread(json_format, 1, 4096, fp);
+    
+    fclose(fp);
+
+    FLString json = {};
+    json.buf = &json_format;
+    json.size = len;
+    bool set_doc_content = CBLDocument_SetJSON(doc, json, &error);
+
+    // Save the document
+    bool saved = CBLDatabase_SaveDocument(db, doc, &error);
+    assert(saved);
+
+    CBLDocument_Release(doc);
+
+    // Simple array index
+    CBLArrayIndexConfiguration array_index_config = {};
+    array_index_config.expressionLanguage = kCBLN1QLLanguage;
+    array_index_config.path = FLSTR("likes");
+    array_index_config.expressions = FLSTR("");
+
+    bool array_index_created = CBLCollection_CreateArrayIndex(
+        default_collection,
+        FLSTR("one_level"),
+        array_index_config,
+        &error
+    );
+    assert(array_index_created);
+
+    int error_pos = 0;
+    CBLQuery* query = CBLDatabase_CreateQuery(
+        db,
+        kCBLN1QLLanguage,
+        FLSTR("SELECT _.name, _like FROM _ UNNEST _.likes as _like WHERE _like = 'travel'"),
+        &error_pos,
+        &error
+    );
+    assert(query);
+
+    FLSliceResult explain_result = CBLQuery_Explain(query);
+    assert(strstr(explain_result.buf, "USING INDEX one_level"));
+
+    CBLResultSet* query_result = CBLQuery_Execute(query, &error);
+    assert(query_result);
+
+    assert(CBLResultSet_Next(query_result));
+
+    FLArray row = CBLResultSet_ResultArray(query_result);
+    FLValue name = FLArray_Get(row, 0);
+    assert(strcmp(FLValue_AsString(name).buf, "Sam") == 0);
+
+    assert(!CBLResultSet_Next(query_result));
+
+    CBLResultSet_Release(query_result);
+    CBLQuery_Release(query);
+
+    // Complex array index
+    array_index_config.expressionLanguage = kCBLN1QLLanguage;
+    array_index_config.path = FLSTR("contacts[].phones");
+    array_index_config.expressions = FLSTR("type");
+
+    array_index_created = CBLCollection_CreateArrayIndex(
+        default_collection,
+        FLSTR("two_level"),
+        array_index_config,
+        &error
+    );
+    assert(array_index_created);
+
+    query = CBLDatabase_CreateQuery(
+        db,
+        kCBLN1QLLanguage,
+        FLSTR("SELECT _.name, contact.type, phone.number FROM _ UNNEST _.contacts as contact UNNEST contact.phones as phone WHERE phone.type = 'mobile'"),
+        &error_pos,
+        &error
+    );
+    assert(query);
+
+    explain_result = CBLQuery_Explain(query);
+    assert(strstr(explain_result.buf, "USING INDEX two_level"));
+
+    query_result = CBLQuery_Execute(query, &error);
+    assert(query_result);
+
+    assert(CBLResultSet_Next(query_result));
+
+    row = CBLResultSet_ResultArray(query_result);
+    name = FLArray_Get(row, 0);
+    assert(strcmp(FLValue_AsString(name).buf, "Sam") == 0);
+
+    assert(CBLResultSet_Next(query_result));
+    assert(!CBLResultSet_Next(query_result));
+
+    CBLResultSet_Release(query_result);
+    CBLQuery_Release(query);
+
+    // Cleanup
+    bool closed = CBLDatabase_Delete(db, &error);
+    assert(closed);
+}