Cli tool for selecting DuckDuckGo bang searches unsing Babashka and gum.

ddg.bb

#!/usr/bin/env bb
;; Script to search ddg.
;; Takes a search term then asks you to select a bang.

;; Copyright John Cooper
;; This program is free software: you can redistribute it and/or modify it under the terms of the 
;; GNU General Public License as published by the Free Software Foundation, 
;; either version 3 of the License, or (at your option) any later version.
;; This program 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 General Public License for more details.
;; You should have received a copy of the GNU General Public License along with this program. ;;
;; If not, see <https://www.gnu.org/licenses/>.

;; Ideas for how it would work.
;; ddg _dpkg foobar => !dpkg foobar
;; ddg -b dpkg foobar => !dpkg foobar
;; ddg foobar => prompt for banging search param.
;;  (let [cacheurl "https://duckduckgo.com/bang.v260.js"])

;; You need to install gum from https://charm.sh
(babashka.deps/add-deps
  '{:deps {io.github.lispyclouds/bblgum {:git/sha "7ebae0e2231899fe2a6ad44bc9ef5fca64099fcd"}}})

(ns bin.ddg
  (:require [babashka.process :as p]
            [clojure.string :as str]
            [babashka.http-client :as http]
            [cheshire.core :as json]
            [babashka.fs :as fs]
            [bblgum.core :as b]))


(def cache-file (str (fs/path (fs/xdg-cache-home) "ddg_bangs.json")))

(defn cache_valid? [filename seconds]
  "Is a file older than x seconds?"
   (and (fs/exists? cache-file)
        (> (+ (* seconds 1000) (fs/file-time->millis (fs/last-modified-time filename)))
           (System/currentTimeMillis))))

(defn get_bangs_json []
  "Fetch the list of bangs from DDG
  Later cache it..."
  (let [cacheurl "https://duckduckgo.com/bang.js"]
    (json/parse-string
      (cond
       (cache_valid? cache-file (* 60 60 24))
       (slurp cache-file)
       :else
       (let [cache-data (:body (http/get cacheurl {:headers {"Accept" "application/json" "user-agent" "curl/7.87.0"} :throw false}))]
         (spit cache-file cache-data)
         cache-data)))))

(defn open_ddg [searchterm]
  "Given a search term open DuckDuckGo in default browser"
  (p/shell "xdg-open" (str "https://duckduckgo.com/?q=" searchterm)))

;; => {"c" "Tech", "d" "www.01net.com", "r" 6, "s" "01net", "sc" "Downloads (apps)", "t" "01net", "u" "http://www.01net.com/recherche/recherche.php?searchstring={{{s}}}&chaine=home"}


(defn bang->selector [bang]
  "Takes in a bang json and returns a string for selecting"
  (str/join ": " (list (get bang "t") (get bang "s") (get bang "sc"))))

(defn selector->bang [selector_string]
  "Give the bang string from the selector"
  (first (str/split  selector_string #":")))

(defn bangs_json->gumlist [bangs_json]
  (map bang->selector bangs_json))

(defn ask_for_bang [bangs_json]
  "Ask user to select the bang for the search"
 (->>
  (b/gum {:cmd :filter
          :in (str/join "\n" (bangs_json->gumlist bangs_json))})
  :result
  first
  selector->bang))

(defn search_term [bang args]
  (->>
   (str/join " " args)
   (str "!" bang " ")))

(let [bangs_json (get_bangs_json)]
  (open_ddg (search_term (ask_for_bang bangs_json) *command-line-args*)))

I've updated the url of the bangs to a more generic one so it works again now and should not need updating.