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Add a data structure for tileset metadata (#44)

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* Progress toward making a tileset metadata structure

* Write metadata from structure to mbtiles

* Write dirtiles metadata.json from metadata structure

* Update changelog
This commit is contained in:
Erica Fischer
2022-12-12 13:32:02 -08:00
committed by GitHub
parent b9af922650
commit 9c77029b63
9 changed files with 204 additions and 108 deletions
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dirtiles.cpp
+72
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@@ -11,8 +11,10 @@
#include <sys/stat.h>
#include <sqlite3.h>
#include "jsonpull/jsonpull.h"
#include "mbtiles.hpp"
#include "dirtiles.hpp"
#include "errors.hpp"
#include "write_json.hpp"
std::string dir_read_tile(std::string base, struct zxy tile) {
std::ifstream pbfFile(base + "/" + tile.path(), std::ios::in | std::ios::binary);
@@ -276,3 +278,73 @@ sqlite3 *dirmeta2tmp(const char *fname) {
return db;
}
static void out(json_writer &state, std::string k, std::string v) {
state.json_comma_newline();
state.json_write_string(k);
state.json_write_string(v);
}
void dir_write_metadata(const char *outdir, const metadata &m) {
std::string metadata = std::string(outdir) + "/metadata.json";
struct stat st;
if (stat(metadata.c_str(), &st) == 0) {
// Leave existing metadata in place with --allow-existing
} else {
FILE *fp = fopen(metadata.c_str(), "w");
if (fp == NULL) {
perror(metadata.c_str());
exit(EXIT_OPEN);
}
json_writer state(fp);
state.json_write_hash();
state.json_write_newline();
out(state, "name", m.name);
out(state, "description", m.description);
out(state, "version", std::to_string(m.version));
out(state, "minzoom", std::to_string(m.minzoom));
out(state, "maxzoom", std::to_string(m.maxzoom));
out(state, "center", std::to_string(m.center_lon) + "," + std::to_string(m.center_lat) + "," + std::to_string(m.center_z));
out(state, "bounds", std::to_string(m.minlon) + "," + std::to_string(m.minlat) + "," +
std::to_string(m.maxlon) + "," + std::to_string(m.maxlat));
out(state, "type", m.type);
if (m.attribution.size() > 0) {
out(state, "attribution", m.attribution);
}
if (m.strategies_json.size() > 0) {
out(state, "strategies", m.strategies_json);
}
out(state, "format", m.format);
out(state, "generator", m.generator);
out(state, "generator_options", m.generator_options);
if (m.vector_layers_json.size() > 0 || m.tilestats_json.size() > 0) {
std::string json = "{";
if (m.vector_layers_json.size() > 0) {
json += "\"vector_layers\": " + m.vector_layers_json;
if (m.tilestats_json.size() > 0) {
json += ",\"tilestats\": " + m.tilestats_json;
}
} else {
if (m.tilestats_json.size() > 0) {
json += "\"tilestats\": " + m.tilestats_json;
}
}
json += "}";
out(state, "json", json);
}
state.json_write_newline();
state.json_end_hash();
state.json_write_newline();
fclose(fp);
}
}