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-;;; ledger-xact.el --- Helper code for use with the "ledger" command-line tool  -*- lexical-binding: t; -*-
-
-;; Copyright (C) 2003-2016 John Wiegley (johnw AT gnu DOT org)
-
-;; This file is not part of GNU Emacs.
-
-;; This 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 2, or (at your option) any later
-;; version.
-;;
-;; This 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 GNU Emacs; see the file COPYING.  If not, write to the
-;; Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
-;; MA 02110-1301 USA.
-
-
-;;; Commentary:
-;; Utilities for running ledger synchronously.
-
-;;; Code:
-
-(require 'eshell)
-(require 'ledger-regex)
-(require 'ledger-navigate)
-(require 'ledger-exec)
-(require 'ledger-post)
-(declare-function ledger-read-date "ledger-mode" (prompt))
-(declare-function ledger-format-date "ledger-init" (&optional date))
-
-;; TODO: This file depends on code in ledger-mode.el, which depends on this.
-
-(defcustom ledger-highlight-xact-under-point t
-  "If t highlight xact under point."
-  :type 'boolean
-  :group 'ledger)
-
-(defvar-local ledger-xact-highlight-overlay (list))
-
-(defun ledger-highlight-make-overlay ()
-  (let ((ovl (make-overlay 1 1)))
-    (overlay-put ovl 'font-lock-face 'ledger-font-xact-highlight-face)
-    (overlay-put ovl 'priority '(nil . 99))
-    ovl))
-
-(defun ledger-highlight-xact-under-point ()
-  "Move the highlight overlay to the current transaction."
-  (when ledger-highlight-xact-under-point
-    (unless ledger-xact-highlight-overlay
-      (setq ledger-xact-highlight-overlay (ledger-highlight-make-overlay)))
-    (let ((exts (ledger-navigate-find-element-extents (point))))
-      (let ((b (car exts))
-            (e (cadr exts))
-            (p (point)))
-        (if (and (> (- e b) 1)            ; not an empty line
-                 (<= p e) (>= p b)        ; point is within the boundaries
-                 (not (region-active-p))) ; no active region
-            (move-overlay ledger-xact-highlight-overlay b (+ 1 e))
-          (move-overlay ledger-xact-highlight-overlay 1 1))))))
-
-(defun ledger-xact-context ()
-  "Return the context of the transaction containing point or nil."
-  (let ((i 0))
-    (while (eq (ledger-context-line-type (ledger-context-other-line i)) 'acct-transaction)
-      (setq i (- i 1)))
-    (let ((context-info (ledger-context-other-line i)))
-      (if (eq (ledger-context-line-type context-info) 'xact)
-          context-info
-        nil))))
-
-(defun ledger-xact-payee ()
-  "Return the payee of the transaction containing point or nil."
-  (let ((xact-context (ledger-xact-context)))
-    (if xact-context
-        (ledger-context-field-value xact-context 'payee)
-      nil)))
-
-(defun ledger-xact-date ()
-  "Return the date of the transaction containing point or nil."
-  (let ((xact-context (ledger-xact-context)))
-    (if xact-context
-        (ledger-context-field-value xact-context 'date)
-      nil)))
-
-(defun ledger-time-less-p (t1 t2)
-  "Say whether time value T1 is less than time value T2."
-  ;; TODO: assert listp, or support when both are strings
-  (or (< (car t1) (car t2))
-      (and (= (car t1) (car t2))
-           (< (nth 1 t1) (nth 1 t2)))))
-
-(defun ledger-xact-find-slot (moment)
-  "Find the right place in the buffer for a transaction at MOMENT.
-MOMENT is an encoded date"
-  (let (last-xact-start)
-    (catch 'found
-      (ledger-xact-iterate-transactions
-       (function
-        (lambda (start date _mark _desc)
-          (setq last-xact-start start)
-          (if (ledger-time-less-p moment date)
-              (throw 'found t))))))
-    (when (and (eobp) last-xact-start)
-      (let ((end (cadr (ledger-navigate-find-xact-extents last-xact-start))))
-        (goto-char end)
-        (insert "\n")
-        (forward-line)))))
-
-(defun ledger-xact-iterate-transactions (callback)
-  "Iterate through each transaction call CALLBACK for each."
-  (goto-char (point-min))
-  (let* ((now (current-time))
-         (current-year (nth 5 (decode-time now))))
-    (while (not (eobp))
-      (when (looking-at ledger-iterate-regex)
-        (let ((found-y-p (match-string 2)))
-          (if found-y-p
-              (setq current-year (string-to-number found-y-p)) ;; a Y directive was found
-            (let ((start (match-beginning 0))
-                  (year (match-string 4))
-                  (month (string-to-number (match-string 5)))
-                  (day (string-to-number (match-string 6)))
-                  (mark (match-string 7))
-                  (desc (match-string 9)))
-              (if (and year (> (length year) 0))
-                  (setq year (string-to-number year)))
-              (funcall callback start
-                       (encode-time 0 0 0 day month
-                                    (or year current-year))
-                       mark desc)))))
-      (forward-line))))
-
-(defvar ledger-copy-transaction-insert-blank-line-after nil
-  "Non-nil means insert blank line after a transaction inserted with ‘ledger-copy-transaction-at-point’.")
-
-(defun ledger-copy-transaction-at-point (date)
-  "Ask for a new DATE and copy the transaction under point to that date.  Leave point on the first amount."
-  (interactive  (list
-                 (ledger-read-date "Copy to date: ")))
-  (let* ((extents (ledger-navigate-find-xact-extents (point)))
-         (transaction (buffer-substring-no-properties (car extents) (cadr extents)))
-         (encoded-date (ledger-parse-iso-date date)))
-    (ledger-xact-find-slot encoded-date)
-    (insert transaction
-            (if ledger-copy-transaction-insert-blank-line-after
-                "\n\n"
-              "\n"))
-    (beginning-of-line -1)
-    (ledger-navigate-beginning-of-xact)
-    (re-search-forward ledger-iso-date-regexp)
-    (replace-match date)
-    (ledger-next-amount)
-    (if (re-search-forward "[-0-9]")
-        (goto-char (match-beginning 0)))))
-
-(defun ledger-delete-current-transaction (pos)
-  "Delete the transaction surrounging POS."
-  (interactive "d")
-  (let ((bounds (ledger-navigate-find-xact-extents pos)))
-    (delete-region (car bounds) (cadr bounds)))
-  (delete-blank-lines))
-
-(defvar ledger-add-transaction-last-date nil
-  "Last date entered using `ledger-read-transaction'.")
-
-(defun ledger-read-transaction ()
-  "Read the text of a transaction, which is at least the current date."
-  (let* ((reference-date (or ledger-add-transaction-last-date (current-time)))
-         (full-date-string (ledger-format-date reference-date))
-         ;; Pre-fill year and month, but not day: this assumes DD is the last format arg.
-         (initial-string (replace-regexp-in-string "[0-9]+$" "" full-date-string))
-         (entered-string (ledger-read-date "Date: ")))
-    (if (string= initial-string entered-string)
-        full-date-string
-      entered-string)))
-
-(defun ledger-parse-iso-date (date)
-  "Try to parse DATE using `ledger-iso-date-regexp' and return a time value or nil."
-  (save-match-data
-    (when (string-match ledger-iso-date-regexp date)
-      (encode-time 0 0 0 (string-to-number (match-string 4 date))
-                   (string-to-number (match-string 3 date))
-                   (string-to-number (match-string 2 date))))))
-
-(defun ledger-add-transaction (transaction-text &optional insert-at-point)
-  "Use ledger xact TRANSACTION-TEXT to add a transaction to the buffer.
-If INSERT-AT-POINT is non-nil insert the transaction there,
-otherwise call `ledger-xact-find-slot' to insert it at the
-correct chronological place in the buffer.  Interactively, the
-date is requested via `ledger-read-date'."
-  (interactive (list (ledger-read-transaction)))
-  (let* ((args (with-temp-buffer
-                 (insert transaction-text)
-                 (eshell-parse-arguments (point-min) (point-max))))
-         (ledger-buf (current-buffer))
-         (separator "\n"))
-    (unless insert-at-point
-      (let* ((date (car args))
-             (parsed-date (ledger-parse-iso-date date)))
-        (setq ledger-add-transaction-last-date parsed-date)
-        (push-mark)
-        ;; TODO: what about when it can't be parsed?
-        (ledger-xact-find-slot (or parsed-date date))
-        (when (looking-at "\n*\\'")
-          (setq separator ""))))
-    (if (> (length args) 1)
-        (save-excursion
-          (insert
-           (with-temp-buffer
-             (apply #'ledger-exec-ledger ledger-buf (current-buffer) "xact"
-                    (mapcar 'eval args))
-             (goto-char (point-min))
-             (ledger-post-align-postings (point-min) (point-max))
-             (buffer-string))
-           separator))
-      (progn
-        (insert (car args) " ")
-        (save-excursion (insert "\n" separator))))))
-
-(provide 'ledger-xact)
-
-;;; ledger-xact.el ends here