r/src/tools/tool_http.c

// retoor <retoor@molodetz.nl>

#include "tool.h"
#include "http_client.h"
#include "r_config.h"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <curl/curl.h>

static struct json_object *http_fetch_get_description(void);
static char *http_fetch_execute(tool_t *self, struct json_object *args);
static void http_fetch_print_action(const char *name, struct json_object *args);

static struct json_object *web_search_get_description(void);
static char *web_search_execute(tool_t *self, struct json_object *args);
static void web_search_print_action(const char *name, struct json_object *args);

static struct json_object *web_search_news_get_description(void);
static char *web_search_news_execute(tool_t *self, struct json_object *args);

static const tool_vtable_t http_fetch_vtable = {
    .get_description = http_fetch_get_description,
    .execute = http_fetch_execute,
    .print_action = http_fetch_print_action
};

static const tool_vtable_t web_search_vtable = {
    .get_description = web_search_get_description,
    .execute = web_search_execute,
    .print_action = web_search_print_action
};

static const tool_vtable_t web_search_news_vtable = {
    .get_description = web_search_news_get_description,
    .execute = web_search_news_execute,
    .print_action = web_search_print_action
};

static tool_t http_fetch_tool = { .vtable = &http_fetch_vtable, .name = "http_fetch" };
static tool_t web_search_tool = { .vtable = &web_search_vtable, .name = "web_search" };
static tool_t web_search_news_tool = { .vtable = &web_search_news_vtable, .name = "web_search_news" };

tool_t *tool_http_fetch_create(void) { return &http_fetch_tool; }
tool_t *tool_web_search_create(void) { return &web_search_tool; }
tool_t *tool_web_search_news_create(void) { return &web_search_news_tool; }

static void http_fetch_print_action(const char *name, struct json_object *args) {
    (void)name;
    if (!args) return;
    struct json_object *url;
    if (json_object_object_get_ex(args, "url", &url)) {
        fprintf(stderr, "  -> Fetching URL: %s\n", json_object_get_string(url));
    }
}

static char *http_fetch_execute(tool_t *self, struct json_object *args) {
    (void)self;
    struct json_object *url_obj;
    if (!json_object_object_get_ex(args, "url", &url_obj)) {
        return strdup("Error: missing 'url' argument");
    }

    http_client_handle client = http_client_create(NULL);
    if (!client) return strdup("Failed to create HTTP client.");

    char *response = NULL;
    r_status_t status = http_get(client, json_object_get_string(url_obj), &response);
    http_client_destroy(client);

    if (status != R_SUCCESS || !response) {
        return strdup("Failed to fetch URL.");
    }
    return response;
}

static struct json_object *http_fetch_get_description(void) {
    struct json_object *root = json_object_new_object();
    json_object_object_add(root, "type", json_object_new_string("function"));

    struct json_object *function = json_object_new_object();
    json_object_object_add(function, "name", json_object_new_string("http_fetch"));
    json_object_object_add(function, "description",
        json_object_new_string("Get the contents of a URL."));

    struct json_object *parameters = json_object_new_object();
    json_object_object_add(parameters, "type", json_object_new_string("object"));

    struct json_object *properties = json_object_new_object();
    struct json_object *url = json_object_new_object();
    json_object_object_add(url, "type", json_object_new_string("string"));
    json_object_object_add(url, "description",
        json_object_new_string("Fetch URL contents."));
    json_object_object_add(properties, "url", url);

    json_object_object_add(parameters, "properties", properties);

    struct json_object *required = json_object_new_array();
    json_object_array_add(required, json_object_new_string("url"));
    json_object_object_add(parameters, "required", required);
    json_object_object_add(parameters, "additionalProperties", json_object_new_boolean(0));

    json_object_object_add(function, "parameters", parameters);

    r_config_handle cfg = r_config_get_instance();
    if (r_config_use_strict(cfg)) {
        json_object_object_add(function, "strict", json_object_new_boolean(1));
    }

    json_object_object_add(root, "function", function);
    return root;
}

static void web_search_print_action(const char *name, struct json_object *args) {
    (void)name;
    if (!args) return;
    struct json_object *query;
    if (json_object_object_get_ex(args, "query", &query)) {
        fprintf(stderr, "  -> Searching web: %s\n", json_object_get_string(query));
    }
}

static char *do_web_search(const char *query) {
    if (!query) return strdup("Query cannot be NULL.");

    char *q_encoded = curl_easy_escape(NULL, query, 0);
    if (!q_encoded) return strdup("Failed to encode query.");

    char url[4096];
    snprintf(url, sizeof(url), "https://static.molodetz.nl/search.cgi?query=%s", q_encoded);
    curl_free(q_encoded);

    http_client_handle client = http_client_create(NULL);
    if (!client) return strdup("Failed to create HTTP client.");

    char *response = NULL;
    r_status_t status = http_get(client, url, &response);
    http_client_destroy(client);

    if (status != R_SUCCESS || !response) {
        return strdup("Failed to search.");
    }
    return response;
}

static char *web_search_execute(tool_t *self, struct json_object *args) {
    (void)self;
    struct json_object *query_obj;
    if (!json_object_object_get_ex(args, "query", &query_obj)) {
        return strdup("Error: missing 'query' argument");
    }
    return do_web_search(json_object_get_string(query_obj));
}

static struct json_object *web_search_get_description(void) {
    struct json_object *root = json_object_new_object();
    json_object_object_add(root, "type", json_object_new_string("function"));

    struct json_object *function = json_object_new_object();
    json_object_object_add(function, "name", json_object_new_string("web_search"));
    json_object_object_add(function, "description",
        json_object_new_string("Searches for information based on a query using search engines like google."));

    struct json_object *parameters = json_object_new_object();
    json_object_object_add(parameters, "type", json_object_new_string("object"));

    struct json_object *properties = json_object_new_object();
    struct json_object *query = json_object_new_object();
    json_object_object_add(query, "type", json_object_new_string("string"));
    json_object_object_add(query, "description",
        json_object_new_string("The url encoded query string to search for information."));
    json_object_object_add(properties, "query", query);

    json_object_object_add(parameters, "properties", properties);

    struct json_object *required = json_object_new_array();
    json_object_array_add(required, json_object_new_string("query"));
    json_object_object_add(parameters, "required", required);
    json_object_object_add(parameters, "additionalProperties", json_object_new_boolean(0));

    json_object_object_add(function, "parameters", parameters);

    r_config_handle cfg = r_config_get_instance();
    if (r_config_use_strict(cfg)) {
        json_object_object_add(function, "strict", json_object_new_boolean(1));
    }

    json_object_object_add(root, "function", function);
    return root;
}

static char *web_search_news_execute(tool_t *self, struct json_object *args) {
    (void)self;
    struct json_object *query_obj;
    if (!json_object_object_get_ex(args, "query", &query_obj)) {
        return strdup("Error: missing 'query' argument");
    }
    return do_web_search(json_object_get_string(query_obj));
}

static struct json_object *web_search_news_get_description(void) {
    struct json_object *root = json_object_new_object();
    json_object_object_add(root, "type", json_object_new_string("function"));

    struct json_object *function = json_object_new_object();
    json_object_object_add(function, "name", json_object_new_string("web_search_news"));
    json_object_object_add(function, "description",
        json_object_new_string("Searches for news articles based on a query."));

    struct json_object *parameters = json_object_new_object();
    json_object_object_add(parameters, "type", json_object_new_string("object"));

    struct json_object *properties = json_object_new_object();
    struct json_object *query = json_object_new_object();
    json_object_object_add(query, "type", json_object_new_string("string"));
    json_object_object_add(query, "description",
        json_object_new_string("The url encoded query string to search for news articles."));
    json_object_object_add(properties, "query", query);

    json_object_object_add(parameters, "properties", properties);

    struct json_object *required = json_object_new_array();
    json_object_array_add(required, json_object_new_string("query"));
    json_object_object_add(parameters, "required", required);
    json_object_object_add(parameters, "additionalProperties", json_object_new_boolean(0));

    json_object_object_add(function, "parameters", parameters);

    r_config_handle cfg = r_config_get_instance();
    if (r_config_use_strict(cfg)) {
        json_object_object_add(function, "strict", json_object_new_boolean(1));
    }

    json_object_object_add(root, "function", function);
    return root;
}