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lib/casebot.ex

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+defmodule Casebot do
+  @moduledoc """
+  Documentation for `Casebot`.
+
+  master_data is a list of tuples that contains the box designation, row number, and a list of tuples that contain tuples of the road name and address number
+  [(box_designation, row_number, [(road_name, address_number), (road_name, address_number)]), (box_designation, row_number, [(road_name, address_number), (road_name, address_number)],]
+
+  Persistence is stored as plaintext in a file called persist.csv. The
+
+  """
+
+
+@doc """
+
+  master_loop
+  Called by entry_function. Takes master_data object and modifies/reads that as
+  program main loop. Recursive calls itself.
+
+  """
+  def master_loop(master_data) do
+
+    entry = IO.gets(">>>")
+    command_word = String.split(entry) |> List.first()
+    words = String.split(entry)
+    case command_word do
+      "add"  -> add_to_master(words, master_data)
+      "find"  -> find_in_master(words, master_data)
+      "clear" -> clear_entry(words, master_data)
+    end
+
+    master_loop(master_data)
+
+  end
+
+  def run() do
+    #master_data = ensure_file()
+  end
+
+  def ensure_file(path \\ "persist.csv") do
+    unless File.exists?(path) do
+      File.write!(path, "box_name,row_number,road_name,address_number\n")
+    end
+
+    path
+  end
+
+  def add_to_master(entry, master_data) do
+
+  end
+
+  def clear_entry(entry, master_data) do
+  end
+
+  def find_in_master(entry, master_data) do
+    end
+
+
+end

lib/csv.ex

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+defmodule Casebot.CSV do
+  def rows(path) do
+    path
+    |> File.read!()
+    |> NimbleCSV.RFC4180.parse_string(skip_headers: false)
+    |> Enum.map(fn row -> Enum.map(row, &:binary.copy/1) |> List.to_tuple() end)
+  end
+end