#' @author Huazi Li <632473742@@qq.com>
#' @description:
#' Search for Zomato locations by keyword. Provide
#' coordinates to get better search results
#'
#' @param key API key, string
#' @param query suggestion for location name, string
#' @param lat latitude, double
#' @param lon longitude, double
#' @param count max number of results to fetch, integer
#'
#' @name
#' get_locations
#'
#' @title
#' get locations
#'
#' @export
#' @examples
#' get_locations("testkey","van")
#'
#function to search for Zomato locations by keyword
get_locations<-function(key,query,
lat=NULL,lon=NULL,count=NULL){
#check if given api
apikey_check(key)
#check if the testkey
if (key=="testkey"){
testword<-"This is a testkey."
return(testword)
}
if (is.null(query)){
stop("Please enter the city name.")
}
url <- httr::modify_url(
"https://developers.zomato.com",
path = "/api/v2.1/locations")
params=list("query"=query,
"lat" = lat,
"lon" = lon,
"count"= count)
res <- httr::GET(url,
httr::add_headers(
Accept="application/json",
"user-key"=key),
query=params)
#check if the api key can used to connect to zomato
apikey_connectioncheck(res)
#read json into dataframe
datalist<-read_json(res)
#check if return results
if (length(resdata$location_suggestions) == 0){stop("Please try another city name.")}
return(resdata$location_suggestions)
}
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