[wip] working on clingon refactor

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+;;;; app.lisp -- definition of CLI options and entry point.
+
+;; Copyright (C) 2022  Colin Okay
+
+;; This program is free software: you can redistribute it and/or modify
+;; it under the terms of the GNU Affero 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 Affero General Public License for more details.
+
+;; You should have received a copy of the GNU Affero General Public License
+;; along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+
+(in-package :oneliners.cli.app)
+
+;;; VERSION
+(defparameter +ol-version+ "0.8.0")
+
+;;; HELP TEXTS
+(defparameter +oneliners-variables-help-text+
+"
+Oneliners may contain variables.  There are positional variables and
+named variables.
+
+POSITIONAL VARIABLES appear in the oneliner as a # followed by a
+number, which must 1 or greater.  For example:
+
+    echo Hello #1, Happy #2
+
+The #1 and #2 are a positional variables. You might call the above
+like
+
+   ol run 8 Doofus Tuesday
+
+Assuming that the above oneliner has ID 8, then \"Hello Doofus,
+ Happy Tuesday\" would print to the console.
+
+NAMED VARIABLES are similar. They appear in the oneliner as # followed
+by a letter in the Roman alphabet, followed by any sequence of Roman
+letters, numbers, or the symbol _.  For example:
+
+   echo Hello #name you get a #thing
+
+The #name and #thing are named variables. You might call the above like so:
+
+  ol run 3 name=Goober thing='sock in the nose'
+
+Which should print \"Hello Goober you get a sock in the nose\".
+
+Finally, you can MIX POSITIONAL AND NAMED VARIABLES so long as, when
+you run the oneliner, all positional variables appear first.
+")
+
+(defparameter +configure-your-edtior+
+  "Adding explainations for oneliners, either with --add or --edit,
+will use a default system editor. If you do not like the default
+editor you may configure it by the exporting the EDITOR environment
+variable to whatever you prefer.
+
+E.g. in your .bashrc you might put 
+
+export EDITOR=/usr/bin/zile 
+
+")
+
+(defparameter +icons-in-printout-docs+
+  "In the printout of oneliners, several unicode \"icons\" appear.
+Their meaning is as follows:
+
+- ⚠ : Indicates that the oneliner is flagged. 
+- 🔒 : Indicates that the oneliner is locked.
+- 📋 : Indicates that the oneliner will be copied to the clipboard.
+
+")
+
+
+;;; CLON SYNOPSIS DEFINITION 
+
+(eval-when (:compile-toplevel :load-toplevel :execute)
+  (defun group-by (n xs &optional default)
+    (loop for l on xs by (lambda (l) (nthcdr n l))
+          when (<= n (length l))
+            collect (subseq l 0 n)
+          else
+            collect (append l (loop repeat (- n (length l)) collect default))))
+  
+  (defun tabulate-strings (line-width columns strings)
+    (let ((row-format
+            (apply 'concatenate 'string
+                   "~" (prin1-to-string line-width) "<"
+                   (loop for i from 0 below columns
+                         collect "~a"
+                         when (< i (1- columns))
+                         collect "~;"
+                       else
+                         collect "~>"))))
+    (loop for group in (group-by columns strings " ")
+          collect (apply 'format nil row-format group)))))
+
+(defsynopsis (:postfix "COMMAND [ARGS...]")
+  (group (:header "SEARCHING FOR ONELINERS" :hidden t)
+         (text :contents "Usage: ol [OPTIONS] search [TERMS...]")
+         (text :contents " ")
+         (text :contents "Search for oneliners that have been tagged with all of TERMS.")
+         (text :contents "E.g. `ol search grep awk`")
+         (text :contents " ")
+         (text :contents "Options:")
+         (lispobj :long-name "limit"
+                  :argument-type :optional
+                  :argument-name "NUMBER"
+                  :default-value 10
+                  :description "The maximum number of results to return."
+                  :typespec 'integer)
+         (flag :long-name "all-flagged"
+               :description "Request that only flagged oneliners are returned. Without any TERMS, simply returns all flagged oneliners.")
+         (flag :long-name "not-flagged"
+               :description "Request that no flagged oneliners are returned with the search results. Does nothing without TERMS.")
+         (flag :long-name "newest"
+               :description "Return newest oneliners that match. Without any TERMS, simply returns the newest oneliners."))
+  (group (:header "RUNNING ONELINERS" :hidden t)
+         (text :contents "Usage: ol [OPTIONS] run <IDENTIFIER> [ARGS...]")
+         (text :contents " ")
+         (text :contents "Run the oneliner identified by IDENTIFIER, if it exists, with any required ARGS.")
+         (text :contents "IDENTIFIER should either be the name or the unique numeric ID of a oneliner.")
+         (text :contents "E.g. `ol run demo foo bar` # run \"demo\" with args \"foo\" and \"bar\"")
+         (text :contents " ")
+         (text :contents "Options:")
+         (lispobj :long-name "timeout"
+                  :argument-type :optional
+                  :argument-name "SECONDS"
+                  :default-value 1
+                  :typespec 'integer 
+                  :description "How many seconds to wait for standard output before giving up.")
+         (flag :long-name "verbose"
+               :short-name "v"
+               :description "Prints a message indicating the oneliner text that is about to be run prior to execution.")
+         (flag :long-name "confirm"
+               :short-name "c"
+               :description "Prompts the user for confirmation before running. Implies --verbose.")
+         (flag :long-name "draft"
+               :description "Indicates that you wish to run a draft of a oneliner identified by IDENTIFIER."))
+  (group (:header "CLIPPING ONELINERS" :hidden t)
+         (text :contents "Usage: ol clip <IDENTIFIER> [ARGS...]")
+         (text :contents " ")
+         (text :contents "Instead of running a oneliner, copy it to your system's clipboard")
+         (text :contents "ol clip demo-1 foo extra=bar"))
+  (group (:header "SHOWING INFORMATION ABOUT ONELINERS" :hidden t)
+         (text :contents "Usage: ol show <IDENTIFIER>")
+         (text :contents " ")
+         (text :contents "Print information about a oneliner to the screen."))
+  (group (:header "NEW ONELINERS" :hidden t)
+         (text :contents "Usage: ol new")
+         (text :contents " ")
+         (text :contents "Interactively create a new oneliner and upload it to the server."))
+  (group (:header "EDITING ONELINERS" :hidden t)
+         (text :contents "Usage: ol edit <IDENTIFIER>")
+         (text :contents " ")
+         (text :contents "Interactively alter a oneliner and uplaod it to the server.")
+         (text :contents " ")
+         (text :contents "Options:")
+         (flag :long-name "redraft"
+               :description "Indicates that you wish to edit a draft instead of a published oneliner."))
+  (group (:header "PUBLISHING ONELINER DRAFTS" :hidden t)
+         (text :contents "Usage: ol publish <DRAFT>")
+         (text :contents " ")
+         (text :contents "Submits a draft oneliner to the wiki server, and, when successful, deletes the draft."))
+  (group (:header "DRAFTS LISTING" :hidden t)
+         (text :contents "Usage: ol drafts")
+         (text :contents " ")
+         (text :contents "Prints a listing of current drafts of oneliners yet to be published."))
+  (group (:header "TRASH DRAFT" :hidden t)
+         (text :contents "Usage: ol trash <DRAFT>")
+         (text :contents " ")
+         (text :contents "Trashes a draft."))
+  (group (:header "FLAGGING AND UNFLAGGING ONELINERS" :hidden t)
+         (text :contents "Usage: ol <flag | unflag> <IDENTIFIER>")
+         (text :contents " ")
+         (text :contents
+               "Flag or unflag a oneliner. A flagged oneliner is marked as potentially hazardous and will prompt users before exectuion.")
+         (text :contents
+               "Flagged oneliners may also be specifically factor into search using the --all-flagged or --not-flagged search options."))
+  (group (:header "LOCKING AND UNLOCKING ONELINERS" :hidden t)
+         (text :contents "Usage: ol <lock | unlock> <IDENTIFIER>")
+         (text :contents " ")
+         (text :contents "(ADMINS ONLY) Lock or unlock a oneliner. A locked oneliner may not be altered or edited."))
+  (group  (:header "REDEEMING INVITE TOKENS" :hidden t)
+          (text :contents "Usage: ol redeem <INVITE> <HANDLE> <PASSWORD>")
+          (text :contents " ")
+          (text :contents "Redeem an invite token, INVITE, and reate a new contributor account on the wiki server with user handle and password."))
+  (group (:header "INVITE TOKENS" :hidden t)
+         (text :contents "Usage: ol invite")
+         (text :contents " ")
+         (text :contents "Generate a new invite token if you are allowed to do so."))
+  (group (:header "LOGIN AND LOGOUT" :hidden t)
+         (text :contents "Usage: ol <login | logout> [HANDLE PASWORD]")
+         (text :contents " ")
+         (text :contents "Login or logout. If logging in, provide a handle and password.")
+         (text :contents "Once logged in to your configured server, an API access token will be written to your config file, allowing you to make contributions to the wiki."))
+  (group (:header "PASSWORD CHANGES" :hidden t)
+         (text :contents "Usage: ol password <OLD> <NEW> <REPEATED>")
+         (text :contents " ")
+         (text :contents "Change your password on the configured server."))
+  (group (:header "SIGNATURE CHANGES" :hidden t)
+         (text :contents "Usage: ol signature")
+         (text :contents " ")
+         (text :contents "Interactively update your contributor signature."))
+  (group (:header "WHOIS CONTRIBUTOR" :hidden t)
+         (text :contents "Usage: ol whois <HANDLE>")
+         (text :contents " ")
+         (text :contents "Print information about a contributor."))
+  (group (:header "EDITOR CONFIGURATION" :hidden t)
+         (text :contents +configure-your-edtior+))
+  (group (:header "VARIABLES IN ONELINERS" :hidden t)
+         (text :contents +oneliners-variables-help-text+))
+  (group (:header "ICONS IN PRINTOUT" :hidden t)
+         (text :contents +icons-in-printout-docs+))
+  (group (:header "VERSION" :hidden t)
+         (text :contents "Usage: ol version")
+         (text :contents " ")
+         (text :contents "Prints the version of this client."))
+  (group (:header "HELP MENU")
+         (text :contents "Usage: ol help [SECTION]")
+         (text :contents " ")
+         (text :contents "Print a help menu. With no arguments, prints this help.")
+         (text :contents " ")
+         (text :contents  "Command sections include:")
+         (text :contents
+               (str:join
+                #\newline
+                (tabulate-strings
+                 40 5
+                 '("search"  "run"  "clip"   "show"   "new"  "edit"
+                   "delete"  "drafts"  "trash"  "publish"  "flag"
+                   "lock"  "redeem" "invite" "login"  "whois"
+                   "password" "signature" "version"))))
+         (text :contents " ")
+         (text :contents "Additional topics include:")
+         (text :contents
+               (str:join
+                #\newline
+                (tabulate-strings
+                 40 5
+                 '("variables" "editor" "icons"))))))
+
+;;; HELPERS
+
+(defun find-group-with-header (header)
+  "This function should be built in. Is it? How to know? The
+documentation is both extensive and trash.  Any manual that expects
+you to go to sleep with it at night is written for the author more
+than the users."
+  (loop for item in (net.didierverna.clon::items *synopsis*)
+        when (and (typep item 'net.didierverna.clon::group)
+                  (string-equal header (net.didierverna.clon::header item)
+                                :end2 (length header)))
+          return item))
+
+;;; MAIN ENTRY POINT
+
+(defun main ()
+  (macrolet ((help-and-quit-unless (topic check)
+               `(unless ,check
+                  (help-topic ,topic)
+                  (uiop:quit)))) 
+    (make-context)
+    (handler-case 
+        (a:if-let (arguments (remainder))
+          (destructuring-bind (command . args) arguments
+            (let ((id-or-name
+                    (when  args
+                      (or (parse-integer (first args) :junk-allowed t)
+                          (first args))))) 
+              (cli:with-local-state 
+                (handler-case 
+                    (ecase (a:make-keyword (string-upcase command))
+                      (:help
+                       (princ #\newline)
+                       (help-topic (or (first args) "help")))
+                      (:version
+                       (format t "ol v~a~%" +ol-version+ ))
+                      (:search
+                       (cond
+                         ;; if there are args, use them as search terms
+                         (args 
+                          (cli:search-for-oneliners
+                           args
+                           (getopt :long-name "limit")
+                           (getopt :long-name "not-flagged")
+                           (getopt :long-name "all-flagged")
+                           (getopt :long-name "newest")))
+                         ;; no args, but a --newest flag, just return newest
+                         ((getopt :long-name "newest")
+                          (cli::newest-oneliners (getopt :long-name "limit")))
+                         ;; no args, but a --all-falgged
+                         ((getopt :long-name "all-flagged")
+                          (cli::all-flagged-oneliners (getopt :long-name "limit")))
+                         ;; otherwise, print help for search
+                         (t
+                          (help-topic "search")
+                          (uiop:quit))))
+
+                      (:run
+                       (help-and-quit-unless "run" id-or-name)
+                       (cli:run-item id-or-name (rest args)
+                                     :verbose (getopt :long-name "verbose")
+                                     :confirm (getopt :long-name "confirm")
+                                     :timeout (getopt :long-name "timeout")
+                                     :draftp (getopt :long-name "draft")))
+                      (:clip
+                       (help-and-quit-unless "clip" id-or-name)
+                       (cli:run-item id-or-name (rest args)
+                                     :force-clip t
+                                     :draftp (getopt :long-name "draft")))
+                      (:show
+                       (help-and-quit-unless "show" id-or-name)
+                       (cli:print-item-explanation id-or-name))
+                      (:new
+                       (cli:add-new-oneliner))
+                      (:edit
+                       (help-and-quit-unless "edit" id-or-name)
+                       (cli:edit-item id-or-name (getopt :long-name "redraft")))
+                      (:delete
+                       (help-and-quit-unless "delete" id-or-name)
+                       (cli::delete-item id-or-name))
+                      (:publish
+                       (help-and-quit-unless "publish" id-or-name)
+                       (cli::publish-draft id-or-name))
+                      (:trash
+                       (help-and-quit-unless "trash" id-or-name)
+                       (cli::drop-draft id-or-name))
+                      (:drafts
+                       (cli::print-drafts))
+                      (:flag
+                       (help-and-quit-unless "flag" id-or-name)
+                       (cli:flag-item id-or-name))
+                      (:unflag
+                       (help-and-quit-unless "flag" id-or-name)
+                       (cli:unflag-item id-or-name))
+                      (:lock
+                       (help-and-quit-unless "lock" id-or-name)
+                       (cli:lock-item id-or-name))
+                      (:unlock
+                       (help-and-quit-unless "lock" id-or-name)
+                       (cli:unlock-item id-or-name))
+                      (:redeem
+                       (help-and-quit-unless "redeem" (= 3 (length args)))
+                       (apply 'cli:redeem-invite args))
+                      (:invite
+                       (cli:request-invite-code))
+                      (:login
+                       (help-and-quit-unless "login" (= 2 (length args)))
+                       (apply 'cli:login args))
+                      (:logout
+                       (cli:revoke-access))
+                      (:password
+                       (help-and-quit-unless "password" (= 3 (length args)))
+                       (apply 'cli:change-pw args))
+                      (:signature
+                       (cli:change-signature))
+                      (:whois
+                       (help-and-quit-unless "whois" args)
+                       (cli:show-contributor (first args))))
+                  (#+sbcl sb-kernel:case-failure ()
+                    (help-topic "help"))))))
+          (help-topic "help"))
+      (#+sbcl sb-sys:interactive-interrupt
+       #+ccl ccl:interrupt-signal-condition
+       ()
+        (format t "Aborted by User Interrupt.~%")
+        (uiop:quit))))
+  (uiop:quit))
+
+(defun help-topic (topic)
+  (a:if-let (group (find-group-with-header topic))
+    (help :item group)
+    (help)))
+
+
+