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(ns csvtool.core
(:require [clojure.data.csv :as csv]
[clojure.pprint :refer [pprint]]
[clojure.tools.cli :refer [parse-opts]]
[clojure.java.io :as io])
(:gen-class))
(defn mk-mapping [row & keys]
(->> (zipmap keys row)
(#(dissoc % :ignore))))
;; (defn my-read []
;; (with-open [reader (io/reader "in-file.csv")]
;; (doall
;; (map handle-record (csv/read-csv reader)))))
;; (defn my-write []
;; (with-open [writer (io/writer "out-file.csv")]
;; (csv/write-csv writer
;; [["abc" "def"]
;; ["ghi" "jkl"]])))
(defmacro wrap-matcher
([] identity)
([body]
`(fn [~'record]
(let [~'get #(get ~'record %)
~'set #(assoc ~'record %1 %2)]
~body)))
([expr & next]
`(fn [record#]
((wrap-matcher ~@next) ((wrap-matcher ~expr) record#)))))
(defn record-action [name & rest]
(fn [record]
(let [actions {:set (fn [keyword value]
(assoc record keyword value))
:mod (fn [keyword modf]
(update record keyword modf))}]
(if (fn? name)
(name record)
(apply (get actions name) rest)))))
(defn record-test [keyword pred]
(fn [record]
(if (contains? record keyword)
(pred (get record keyword))
nil)))
(defn matches [keyword pattern]
(fn [record]
(re-matches pattern (get record keyword))))
(def always (constantly true))
(defmacro mk-rule
[test & actions]
`(fn [record#]
(if (~test record#)
((~record-action ~@actions) record#)
record#)))
(defmacro mk-chain
([] identity)
([rule]
`(mk-rule ~@rule))
([rule & next]
`(fn [record#]
((mk-chain ~@next)
((mk-chain ~rule) record#)))))
(defmacro defchain
[name & rules]
`(def ~name (mk-chain ~@rules)))
(defchain default
;; Set default account
[always :set :account2 "expenses:unknown"]
[(matches :desc #"(?i)key food.*")
:set :desc "Key Foods"]
[(matches :desc #"(?i)google \*cloud")
:set :account2 "expenses:services"]
)
;; (defmacro matches
;; [keyword pattern]
;; `(wrap-matcher
;; (let [v# (~'get ~keyword)]
;; (and v# (re-matches ~pattern (~'get ~keyword))))))
;; (defmacro defchain
;; ([] identity)
;; ([[pred & arg]]
;; (let [expr2
;; (if (= :do (first arg))
;; `((wrap-matcher ~@(rest arg)))
;; arg)]
;; `(fn [record#]
;; (if (~pred record#)
;; (~@expr2 record#)
;; record#))))
;; ([x & next]
;; `(fn [record#]
;; ((defchain ~@next)
;; ((defchain ~x) record#)))))
;; (def always (constantly true))
;; (def other-rules
;; (defchain
;; [(matches :desc #"Amazon.com.*")
;; :do (set :desc "Amazon purchase")]))
;; (def my-rules
;; (defchain
;; [always :do (set :account2 "expenses:unknown")]
;; [(matches :desc #"(?i)key food.*")
;; :do
;; (set :desc "Key Foods")
;; (set :account2 "expenses:groceries")]
;; [(matches :desc #"(?i)google \*cloud")
;; :do
;; (set :desc "Google Cloud")
;; (set :account2 "expenses:services")]
;; [always other-rules]))
(defn handle-record [row]
(let [record (mk-mapping row :date :postdate :desc :category :type :amount :memo)]
(default record)
))
(defn process-file [path]
(with-open [reader (io/reader path)]
(doall
(let [csv (csv/read-csv reader)
;; Skip header
data (drop 1 csv)
sample (take 10 data)
records (map handle-record sample)]
(pprint records)))))
(def cli-options
[["-f" "--file" :required "Input file"]
["-h" "--help"]])
(defn -main
[& args]
(pprint (parse-opts args cli-options))
(let [{:keys [options arguments errors summary]} (parse-opts args cli-options)]
(cond
(:file options) (process-file (:file options))
:else
(do (println "Failed")))))
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