85 lines
3.0 KiB
C
85 lines
3.0 KiB
C
#include <stdio.h>
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#include <stdlib.h>
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#include <math.h>
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#include <time.h>
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#include <unistd.h>
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#include <sys/time.h>
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#include <toaru/json.h>
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#include <toaru/hashmap.h>
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#include <toaru/list.h>
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typedef struct JSON_Value Value;
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#define WEATHER_CONF_PATH "/etc/weather.json"
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#define WEATHER_DATA_PATH "/tmp/weather-data.json"
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#define WEATHER_OUT_PATH "/tmp/weather-parsed.conf"
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#define LOCATION_DATA_PATH "/tmp/location-data.json"
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int main(int argc, char * argv[]) {
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Value * config = json_parse_file(WEATHER_CONF_PATH);
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if (!config) {
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fprintf(stderr, "No weather config data\n");
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return 1;
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}
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char * city = JSON_KEY(config, "city")->string;
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char * key = JSON_KEY(config, "key")->string;
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char * units = JSON_KEY(config, "units")->string;
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char cmdline[1024];
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/* If the city is 'guess', we'll make a single query to a separate service to
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* get a location from the user's external IP... */
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if (!strcmp(city, "guess")) {
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/* See if the location data already exists... */
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Value * locationData = json_parse_file(LOCATION_DATA_PATH);
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if (!locationData) {
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sprintf(cmdline, "fetch -o \"" LOCATION_DATA_PATH "\" \"http://ip-api.com/json/?fields=lat,lon,city,offset\"");
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system(cmdline);
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locationData = json_parse_file(LOCATION_DATA_PATH);
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}
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/* If we still failed to load it, then bail. */
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if (!locationData) {
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fprintf(stderr, "%s: city field was set to 'guess' but failed to acquire data from IP geolocation service\n", argv[0]);
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return 1;
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}
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city = JSON_KEY(locationData, "city")->string;
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double lat = JSON_KEY(locationData, "lat")->number;
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double lon = JSON_KEY(locationData, "lon")->number;
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sprintf(cmdline, "fetch -o \"" WEATHER_DATA_PATH "\" \"http://api.openweathermap.org/data/2.5/weather?lat=%.5lf&lon=%.5lf&appid=%s&units=%s\"", lat, lon, key, units);
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system(cmdline);
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} else {
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sprintf(cmdline, "fetch -o \"" WEATHER_DATA_PATH "\" \"http://api.openweathermap.org/data/2.5/weather?q=%s&appid=%s&units=%s\"", city, key, units);
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system(cmdline);
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}
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Value * result = json_parse_file(WEATHER_DATA_PATH);
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assert(result && result->type == JSON_TYPE_OBJECT);
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Value * _main = JSON_KEY(result,"main");
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Value * conditions = (JSON_KEY(result,"weather") && JSON_KEY(result,"weather")->array->length > 0) ?
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JSON_IND(JSON_KEY(result,"weather"),0) : NULL;
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FILE * out = fopen(WEATHER_OUT_PATH, "w");
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fprintf(out, "%.2lf\n", JSON_KEY(_main,"temp")->number);
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fprintf(out, "%d\n", (int)JSON_KEY(_main,"temp")->number);
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fprintf(out, "%s\n", conditions ? JSON_KEY(conditions,"main")->string : "");
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fprintf(out, "%s\n", conditions ? JSON_KEY(conditions,"icon")->string : "");
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fprintf(out, "%d\n", (int)JSON_KEY(_main,"humidity")->number);
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fprintf(out, "%d\n", JSON_KEY(JSON_KEY(result,"clouds"),"all") ? (int)JSON_KEY(JSON_KEY(result,"clouds"),"all")->number : 0);
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fprintf(out, "%s\n", city);
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char * format = "%a, %d %b %Y %H:%M:%S";
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struct tm * timeinfo;
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struct timeval now;
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char buf[BUFSIZ] = {0};
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gettimeofday(&now, NULL);
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timeinfo = localtime((time_t *)&now.tv_sec);
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strftime(buf,BUFSIZ,format,timeinfo);
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fprintf(out, buf);
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fclose(out);
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return 0;
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}
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