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Factor out code for reading metadata.json

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This commit is contained in:
Eric Fischer
2017-11-30 15:49:38 -08:00
parent 1acd771743
commit d7f44ab082
6 changed files with 131 additions and 188 deletions
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dirtiles.cpp
+49
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@@ -8,6 +8,8 @@
#include <unistd.h>
#include <dirent.h>
#include <sys/stat.h>
#include <sqlite3.h>
#include "jsonpull/jsonpull.h"
#include "dirtiles.hpp"
std::string dir_read_tile(std::string base, struct zxy tile) {
@@ -148,3 +150,50 @@ std::vector<zxy> enumerate_dirtiles(const char *fname) {
std::sort(tiles.begin(), tiles.end());
return tiles;
}
sqlite3 *dirmeta2tmp(const char *fname) {
sqlite3 *db;
char *err = NULL;
if (sqlite3_open("", &db) != SQLITE_OK) {
fprintf(stderr, "Temporary db: %s\n", sqlite3_errmsg(db));
exit(EXIT_FAILURE);
}
if (sqlite3_exec(db, "CREATE TABLE metadata (name text, value text);", NULL, NULL, &err) != SQLITE_OK) {
fprintf(stderr, "Create metadata table: %s\n", err);
exit(EXIT_FAILURE);
}
std::string name = fname;
name += "/metadata.json";
FILE *f = fopen(name.c_str(), "r");
if (f == NULL) {
perror(name.c_str());
exit(EXIT_FAILURE);
}
json_pull *jp = json_begin_file(f);
json_object *o = json_read_tree(jp);
if (o->type != JSON_HASH) {
fprintf(stderr, "%s: bad metadata format\n", name.c_str());
exit(EXIT_FAILURE);
}
for (size_t i = 0; i < o->length; i++) {
if (o->keys[i]->type != JSON_STRING || o->values[i]->type != JSON_STRING) {
fprintf(stderr, "%s: non-string in metadata\n", name.c_str());
}
char *sql = sqlite3_mprintf("INSERT INTO metadata (name, value) VALUES (%Q, %Q);", o->keys[i]->string, o->values[i]->string);
if (sqlite3_exec(db, sql, NULL, NULL, &err) != SQLITE_OK) {
fprintf(stderr, "set %s in metadata: %s\n", o->keys[i]->string, err);
}
sqlite3_free(sql);
}
json_end(jp);
fclose(f);
return db;
}