Trying to get organized. Move things db, import, and export out of ssb.c.

git-svn-id: https://www.unprompted.com/svn/projects/tildefriends/trunk@3655 ed5197a5-7fde-0310-b194-c3ffbd925b24

src/ssb.export.c

@@ -0,0 +1,100 @@
+#include "ssb.export.h"
+
+#include "ssb.h"
+
+#include <stdlib.h>
+#include <string.h>
+#include <sqlite3.h>
+#include <uv.h>
+
+static void _write_file(const char* path, void* blob, size_t size)
+{
+	FILE* file = fopen(path, "wb");
+	if (file) {
+		fwrite(blob, 1, size, file);
+		fclose(file);
+	} else {
+		printf("Failed to open %s for write: %s.\n", path, strerror(errno));
+	}
+}
+
+void tf_ssb_export(tf_ssb_t* ssb, const char* key)
+{
+	char user[256] = { 0 };
+	char path[256] = { 0 };
+	if (sscanf(key, "/~%255[^/]/%255s", user, path) != 2) {
+		printf("Unable to export %s.\n", key);
+		return;
+	}
+
+	char app_blob_id[64] = { 0 };
+
+	sqlite3_stmt* statement;
+	if (sqlite3_prepare(tf_ssb_get_db(ssb), "SELECT value FROM properties WHERE id = $1 AND key = 'path:' || $2", -1, &statement, NULL) == SQLITE_OK) {
+		if (sqlite3_bind_text(statement, 1, user, -1, NULL) == SQLITE_OK &&
+			sqlite3_bind_text(statement, 2, path, -1, NULL) == SQLITE_OK &&
+			sqlite3_step(statement) == SQLITE_ROW) {
+			int len = sqlite3_column_bytes(statement, 0);
+			if (len >= (int)sizeof(app_blob_id)) {
+				len = sizeof(app_blob_id) - 1;
+			}
+			memcpy(app_blob_id, sqlite3_column_text(statement, 0), len);
+			app_blob_id[len] = '\0';
+		}
+		sqlite3_finalize(statement);
+	}
+
+	if (!*app_blob_id) {
+		printf("Did not find app blob ID for %s.\n", key);
+		return;
+	}
+
+	uint8_t* blob = NULL;
+	size_t size = 0;
+	if (!tf_ssb_blob_get(ssb, app_blob_id, &blob, &size)) {
+		printf("Did not find blob for %s: %s.\n", key, app_blob_id);
+		return;
+	}
+	char file_path[1024];
+	snprintf(file_path, sizeof(file_path), "apps/%s/%s.json", user, path);
+	_write_file(file_path, blob, size);
+	JSContext* context = tf_ssb_get_context(ssb);
+	JSValue app = JS_ParseJSON(context, (const char*)blob, size, NULL);
+	free(blob);
+
+	JSValue files = JS_GetPropertyStr(context, app, "files");
+	JSPropertyEnum* ptab = NULL;
+	uint32_t plen = 0;
+	if (JS_GetOwnPropertyNames(context, &ptab, &plen, files, JS_GPN_STRING_MASK) == 0) {
+		for (uint32_t i = 0; i < plen; ++i) {
+			JSPropertyDescriptor desc;
+			if (JS_GetOwnProperty(context, &desc, files, ptab[i].atom) == 1) {
+				JSValue key = JS_AtomToString(context, ptab[i].atom);
+				const char* file_name = JS_ToCString(context, key);
+				const char* blob_id = JS_ToCString(context, desc.value);
+
+				uint8_t* file_blob = NULL;
+				size_t file_size = 0;
+				if (tf_ssb_blob_get(ssb, blob_id, &file_blob, &file_size)) {
+					snprintf(file_path, sizeof(file_path), "apps/%s/%s/%s", user, path, file_name);
+					_write_file(file_path, file_blob, file_size);
+					free(file_blob);
+				}
+
+				JS_FreeCString(context, file_name);
+				JS_FreeValue(context, key);
+				JS_FreeCString(context, blob_id);
+				JS_FreeValue(context, desc.value);
+			}
+		}
+	}
+
+	for (uint32_t i = 0; i < plen; ++i) {
+		JS_FreeAtom(context, ptab[i].atom);
+	}
+	js_free(context, ptab);
+
+	JS_FreeValue(context, files);
+	JS_FreeValue(context, app);
+}
+