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/*
Copyright (C) 2024 Sutou Kouhei <kou@clear-code.com>
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifdef GRN_EMBEDDED
# define GRN_PLUGIN_FUNCTION_TAG functions_h3
#endif
#include <groonga/plugin.h>
static grn_obj *
grn_h3_ensure_wgs84_geo_point(grn_ctx *ctx,
grn_obj *input,
grn_obj *buffer,
const char *tag,
const char *input_name)
{
if (grn_obj_is_bulk(ctx, input) &&
input->header.domain == GRN_DB_WGS84_GEO_POINT) {
return input;
}
if (grn_obj_is_text_family_bulk(ctx, input)) {
GRN_BULK_REWIND(buffer);
grn_rc rc = grn_obj_cast(ctx, input, buffer, false);
if (rc == GRN_SUCCESS) {
return buffer;
}
}
grn_obj inspected;
GRN_TEXT_INIT(&inspected, 0);
grn_inspect(ctx, &inspected, input);
GRN_PLUGIN_ERROR(ctx,
GRN_INVALID_ARGUMENT,
"%s %s must be WGS84GeoPoint: %.*s",
tag,
input_name,
(int)GRN_TEXT_LEN(&inspected),
GRN_TEXT_VALUE(&inspected));
GRN_OBJ_FIN(ctx, &inspected);
return NULL;
}
static grn_obj *
func_h3_grid_distance(grn_ctx *ctx,
int n_args,
grn_obj **args,
grn_user_data *user_data)
{
const char *tag = "h3_grid_distance():";
if (n_args != 3) {
GRN_PLUGIN_ERROR(ctx,
GRN_INVALID_ARGUMENT,
"%s wrong number of arguments (%d for 3)",
tag,
n_args);
return NULL;
}
grn_obj *distance_obj = NULL;
grn_obj *point1_obj = args[0];
grn_obj *point2_obj = args[1];
grn_obj *resolution_obj = args[2];
grn_obj point1_buffer;
GRN_WGS84_GEO_POINT_INIT(&point1_buffer, 0);
grn_obj point2_buffer;
GRN_WGS84_GEO_POINT_INIT(&point2_buffer, 0);
int32_t resolution =
grn_plugin_proc_get_value_int32(ctx, resolution_obj, -1, tag);
point1_obj = grn_h3_ensure_wgs84_geo_point(ctx,
point1_obj,
&point1_buffer,
tag,
"point1");
if (!point1_obj) {
goto exit;
}
point2_obj = grn_h3_ensure_wgs84_geo_point(ctx,
point2_obj,
&point2_buffer,
tag,
"point2");
if (!point2_obj) {
goto exit;
}
uint64_t h3_index1 = grn_h3_compute_cell(ctx,
GRN_GEO_POINT_VALUE_RAW(point1_obj),
resolution,
tag);
if (ctx->rc != GRN_SUCCESS) {
goto exit;
}
uint64_t h3_index2 = grn_h3_compute_cell(ctx,
GRN_GEO_POINT_VALUE_RAW(point2_obj),
resolution,
tag);
if (ctx->rc != GRN_SUCCESS) {
goto exit;
}
uint64_t distance =
grn_h3_compute_grid_distance(ctx, h3_index1, h3_index2, tag);
if (ctx->rc != GRN_SUCCESS) {
goto exit;
}
distance_obj = grn_plugin_proc_alloc(ctx, user_data, GRN_DB_UINT64, 0);
if (!distance_obj) {
return NULL;
}
GRN_UINT64_SET(ctx, distance_obj, distance);
exit:
GRN_OBJ_FIN(ctx, &point1_buffer);
GRN_OBJ_FIN(ctx, &point2_buffer);
return distance_obj;
}
static grn_rc
applier_h3_grid_distance(grn_ctx *ctx, grn_applier_data *data)
{
const char *tag = "h3_grid_distance():";
grn_obj *table = grn_applier_data_get_table(ctx, data);
grn_obj *output_column = grn_applier_data_get_output_column(ctx, data);
size_t n_args;
grn_obj **args = grn_applier_data_get_args(ctx, data, &n_args);
if (n_args != 3) {
GRN_PLUGIN_ERROR(ctx,
GRN_INVALID_ARGUMENT,
"%s wrong number of arguments (%zu for 3)",
tag,
n_args);
return ctx->rc;
}
grn_obj *input_column = args[0];
grn_obj *point2_obj = args[1];
grn_obj *resolution_obj = args[2];
int32_t resolution =
grn_plugin_proc_get_value_int32(ctx, resolution_obj, -1, tag);
if (!(grn_obj_is_scalar_column(ctx, input_column) ||
grn_obj_is_scalar_accessor(ctx, input_column))) {
grn_obj inspected;
GRN_TEXT_INIT(&inspected, 0);
grn_inspect(ctx, &inspected, input_column);
GRN_PLUGIN_ERROR(
ctx,
GRN_INVALID_ARGUMENT,
"%s 1st argument must be a scalar column or accessor: %.*s",
tag,
(int)(GRN_TEXT_LEN(&inspected)),
GRN_TEXT_VALUE(&inspected));
GRN_OBJ_FIN(ctx, &inspected);
return ctx->rc;
}
grn_id input_column_range = grn_obj_get_range(ctx, input_column);
if (input_column_range != GRN_DB_WGS84_GEO_POINT) {
GRN_PLUGIN_ERROR(ctx,
GRN_INVALID_ARGUMENT,
"%s 1st argument's type must be WGS84GeoPoint: %s",
tag,
grn_type_id_to_string_builtin(ctx, input_column_range));
return ctx->rc;
}
grn_obj point2_buffer;
GRN_WGS84_GEO_POINT_INIT(&point2_buffer, 0);
point2_obj = grn_h3_ensure_wgs84_geo_point(ctx,
point2_obj,
&point2_buffer,
tag,
"point2");
uint64_t h3_index2 = grn_h3_compute_cell(ctx,
GRN_GEO_POINT_VALUE_RAW(point2_obj),
resolution,
tag);
GRN_OBJ_FIN(ctx, &point2_buffer);
if (ctx->rc != GRN_SUCCESS) {
return ctx->rc;
}
if (grn_table_size(ctx, table) == 0) {
return ctx->rc;
}
grn_obj point1_buffer;
GRN_WGS84_GEO_POINT_INIT(&point1_buffer, 0);
grn_obj distance_buffer;
GRN_UINT64_INIT(&distance_buffer, 0);
GRN_TABLE_EACH_BEGIN(ctx, table, cursor, id)
{
GRN_BULK_REWIND(&point1_buffer);
grn_obj_get_value(ctx, input_column, id, &point1_buffer);
if (GRN_BULK_VSIZE(&point1_buffer) != sizeof(grn_geo_point)) {
continue;
}
uint64_t h3_index1 =
grn_h3_compute_cell(ctx,
GRN_GEO_POINT_VALUE_RAW(&point1_buffer),
resolution,
tag);
if (ctx->rc != GRN_SUCCESS) {
break;
}
uint64_t distance_raw =
grn_h3_compute_grid_distance(ctx, h3_index1, h3_index2, tag);
if (ctx->rc != GRN_SUCCESS) {
break;
}
GRN_UINT64_SET(ctx, &distance_buffer, distance_raw);
grn_obj_set_value(ctx, output_column, id, &distance_buffer, GRN_OBJ_SET);
if (ctx->rc != GRN_SUCCESS) {
break;
}
}
GRN_TABLE_EACH_END(ctx, cursor);
GRN_OBJ_FIN(ctx, &point1_buffer);
GRN_OBJ_FIN(ctx, &distance_buffer);
return ctx->rc;
}
static grn_obj *
func_h3_in_grid_disk(grn_ctx *ctx,
int n_args,
grn_obj **args,
grn_user_data *user_data)
{
const char *tag = "h3_in_grid_disk():";
if (n_args != 4) {
GRN_PLUGIN_ERROR(ctx,
GRN_INVALID_ARGUMENT,
"%s wrong number of arguments (%d for 4)",
tag,
n_args);
return NULL;
}
grn_obj *in_obj = NULL;
grn_obj *target_obj = args[0];
grn_obj *origin_obj = args[1];
grn_obj *resolution_obj = args[2];
grn_obj *k_obj = args[3];
grn_obj target_buffer;
GRN_WGS84_GEO_POINT_INIT(&target_buffer, 0);
grn_obj origin_buffer;
GRN_WGS84_GEO_POINT_INIT(&origin_buffer, 0);
grn_obj h3_indices;
GRN_UINT64_INIT(&h3_indices, GRN_OBJ_VECTOR);
int32_t resolution =
grn_plugin_proc_get_value_int32(ctx, resolution_obj, -1, tag);
int32_t k = grn_plugin_proc_get_value_int32(ctx, k_obj, -1, tag);
target_obj = grn_h3_ensure_wgs84_geo_point(ctx,
target_obj,
&target_buffer,
tag,
"target");
if (!target_obj) {
goto exit;
}
uint64_t target_index =
grn_h3_compute_cell(ctx,
GRN_GEO_POINT_VALUE_RAW(target_obj),
resolution,
tag);
if (ctx->rc != GRN_SUCCESS) {
goto exit;
}
origin_obj = grn_h3_ensure_wgs84_geo_point(ctx,
origin_obj,
&origin_buffer,
tag,
"origin");
if (!origin_obj) {
goto exit;
}
if (grn_h3_compute_grid_disk(ctx,
GRN_GEO_POINT_VALUE_RAW(origin_obj),
resolution,
k,
&h3_indices,
tag) != GRN_SUCCESS) {
goto exit;
}
bool in = false;
size_t i;
size_t n_h3_indices = GRN_UINT64_VECTOR_SIZE(&h3_indices);
for (i = 0; i < n_h3_indices; i++) {
uint64_t h3_index = GRN_UINT64_VALUE_AT(&h3_indices, i);
if (h3_index == target_index) {
in = true;
break;
}
}
in_obj = grn_plugin_proc_alloc(ctx, user_data, GRN_DB_BOOL, 0);
if (!in_obj) {
return NULL;
}
GRN_BOOL_SET(ctx, in_obj, in);
exit:
GRN_OBJ_FIN(ctx, &target_buffer);
GRN_OBJ_FIN(ctx, &origin_buffer);
GRN_OBJ_FIN(ctx, &h3_indices);
return in_obj;
}
static grn_rc
selector_h3_in_grid_disk(grn_ctx *ctx,
grn_obj *table,
grn_obj *index,
int n_args,
grn_obj **args,
grn_obj *res,
grn_operator op)
{
const char *tag = "h3_in_grid_disk():";
if ((n_args - 1) != 4) {
GRN_PLUGIN_ERROR(ctx,
GRN_INVALID_ARGUMENT,
"%s wrong number of arguments (%d for 4)",
tag,
(n_args - 1));
return ctx->rc;
}
grn_obj *origin_obj = args[2];
grn_obj *resolution_obj = args[3];
grn_obj *k_obj = args[4];
grn_obj origin_buffer;
GRN_WGS84_GEO_POINT_INIT(&origin_buffer, 0);
grn_obj h3_indices;
GRN_UINT64_INIT(&h3_indices, GRN_OBJ_VECTOR);
int32_t resolution =
grn_plugin_proc_get_value_int32(ctx, resolution_obj, -1, tag);
int32_t k = grn_plugin_proc_get_value_int32(ctx, k_obj, -1, tag);
origin_obj = grn_h3_ensure_wgs84_geo_point(ctx,
origin_obj,
&origin_buffer,
tag,
"origin");
if (!origin_obj) {
goto exit;
}
if (grn_h3_compute_grid_disk(ctx,
GRN_GEO_POINT_VALUE_RAW(origin_obj),
resolution,
k,
&h3_indices,
tag) != GRN_SUCCESS) {
goto exit;
}
grn_ii *ii = (grn_ii *)index;
grn_obj *lexicon = grn_ii_get_lexicon(ctx, ii);
size_t i;
size_t n_h3_indices = GRN_UINT64_VECTOR_SIZE(&h3_indices);
for (i = 0; i < n_h3_indices; i++) {
uint64_t h3_index = GRN_UINT64_VALUE_AT(&h3_indices, i);
if (h3_index == 0) {
continue;
}
grn_id id = grn_table_get(ctx, lexicon, &h3_index, sizeof(uint64_t));
if (id == GRN_ID_NIL) {
continue;
}
grn_ii_select_by_id(ctx, ii, id, (grn_hash *)res, op);
}
grn_ii_resolve_sel_and(ctx, (grn_hash *)res, op);
exit:
GRN_OBJ_FIN(ctx, &origin_buffer);
GRN_OBJ_FIN(ctx, &h3_indices);
return ctx->rc;
}
grn_rc
GRN_PLUGIN_INIT(grn_ctx *ctx)
{
return ctx->rc;
}
grn_rc
GRN_PLUGIN_REGISTER(grn_ctx *ctx)
{
grn_rc rc = GRN_SUCCESS;
{
grn_obj *proc = grn_proc_create(ctx,
"h3_grid_distance",
-1,
GRN_PROC_FUNCTION,
func_h3_grid_distance,
NULL,
NULL,
0,
NULL);
grn_proc_set_applier(ctx, proc, applier_h3_grid_distance);
}
{
grn_obj *proc = grn_proc_create(ctx,
"h3_in_grid_disk",
-1,
GRN_PROC_FUNCTION,
func_h3_in_grid_disk,
NULL,
NULL,
0,
NULL);
grn_proc_set_selector(ctx, proc, selector_h3_in_grid_disk);
grn_proc_set_selector_operator(ctx, proc, GRN_OP_MATCH);
}
return rc;
}
grn_rc
GRN_PLUGIN_FIN(grn_ctx *ctx)
{
return GRN_SUCCESS;
}
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