From be2bf751536850e7bdfbd876ef908c5d6cf00087 Mon Sep 17 00:00:00 2001
From: Marc Coquand <marc@mccd.space>
Date: Tue, 14 May 2024 10:46:28 -0500
Subject: Add search and tag search

---
 lib/headlines.ml | 92 ++++++++++++++++++++++++++++++++++++++++++++++----------
 1 file changed, 76 insertions(+), 16 deletions(-)

(limited to 'lib/headlines.ml')

diff --git a/lib/headlines.ml b/lib/headlines.ml
index 8fab7f6..f32b6ef 100644
--- a/lib/headlines.ml
+++ b/lib/headlines.ml
@@ -1,16 +1,27 @@
 module Grep = Grep
 module Common = Common
 open Notty
+module Input_screen = Input_screen
 
-let content = Grep.get_headlines () |> Grep.parse_headlines
-let content_pretty = content |> Grep.pretty_format
+type state =
+  { tag : string option
+  ; pos : int * int
+  ; scroll : int
+  ; content : (string * string) array
+  ; content_pretty : string array
+  }
 
-let rec headline_screen t (((x, y) as pos), scroll) =
+let rec headline_screen t ({ tag; pos; scroll; content; content_pretty } as state) =
+  print_endline (Option.value ~default:"No tag" tag);
+  let x, y = pos in
   let img =
-    let dot = I.string A.(fg black) ">" |> I.pad ~l:0 ~t:(y - scroll)
+    let dot = I.string A.(st bold) ">" |> I.pad ~l:0 ~t:(y - scroll)
     and elements =
       Array.mapi
-        (fun i el -> I.strf ~attr:A.(fg black) "%s" el |> I.pad ~l:2 ~t:i)
+        (fun i el ->
+          if i == y - scroll
+          then I.strf ~attr:A.(st underline) "%s" el |> I.pad ~l:2 ~t:i
+          else I.strf "%s" el |> I.pad ~l:2 ~t:i)
         (Array.to_seq content_pretty |> Seq.drop scroll |> Array.of_seq)
     in
     let open I in
@@ -21,11 +32,11 @@ let rec headline_screen t (((x, y) as pos), scroll) =
   let content_length = Array.length content_pretty in
   let scroll_up () =
     let scroll = if y - scroll = 0 then max (scroll - 1) 0 else scroll in
-    headline_screen t @@ ((x, max (y - 1) 0), scroll)
+    headline_screen t @@ { state with pos = x, max (y - 1) 0; scroll }
   in
   let scroll_down () =
     let scroll = if y - scroll >= size_y - 1 then scroll + 1 else scroll in
-    headline_screen t @@ ((x, min (y + 1) content_length), scroll)
+    headline_screen t @@ { state with pos = x, min (y + 1) content_length; scroll }
   in
   match Common.Term.event t with
   | `End | `Key (`Escape, []) | `Key (`ASCII 'q', []) | `Key (`ASCII 'C', [ `Ctrl ]) -> ()
@@ -33,18 +44,52 @@ let rec headline_screen t (((x, y) as pos), scroll) =
     (match s with
      | `Down -> scroll_down ()
      | `Up -> scroll_up ())
-  | `Resize _ -> headline_screen t (pos, scroll)
+  | `Resize _ -> headline_screen t state
   | `Mouse ((`Press _ | `Drag), (_, y), _) ->
-    headline_screen t ((0, min y content_length), scroll)
+    headline_screen t { state with pos = 0, min y content_length }
+  | `Key (`ASCII 't', []) ->
+    let (input_state : Input_screen.state) =
+      { screen = img
+      ; user_input = ""
+      ; prompt = "TAG: "
+      ; on_enter =
+          (fun tag ->
+            let content = Grep.get_tagged_headlines tag () |> Grep.parse_headlines in
+            let content_pretty = Grep.pretty_format content in
+            Common.Term.cursor t None;
+            headline_screen
+              t
+              { state with content; content_pretty; pos = 0, 0; scroll = 0 })
+      ; on_cancel =
+          (fun _ ->
+            Common.Term.cursor t None;
+            headline_screen t state)
+      }
+    in
+    Input_screen.render t input_state
+  | `Key (`ASCII 's', []) ->
+    let (input_state : Input_screen.state) =
+      { screen = img
+      ; user_input = ""
+      ; prompt = "SEARCH: "
+      ; on_enter =
+          (fun _ ->
+            Common.Term.cursor t None;
+            headline_screen t { state with pos = 0, 0; scroll = 0 })
+      ; on_cancel =
+          (fun _ ->
+            Common.Term.cursor t None;
+            headline_screen t state)
+      }
+    in
+    Input_screen.render t input_state
   | `Key (`ASCII 'j', []) | `Key (`ASCII 'N', [ `Ctrl ]) -> scroll_down ()
-  | `Key (`ASCII 'k', []) | `Key (`ASCII 'P', [ `Ctrl ]) ->
-    let scroll = if y - scroll = 0 then max (scroll - 1) 0 else scroll in
-    headline_screen t @@ ((x, max (y - 1) 0), scroll)
+  | `Key (`ASCII 'k', []) | `Key (`ASCII 'P', [ `Ctrl ]) -> scroll_up ()
   | `Key (`Arrow d, _) ->
     (match d with
      | `Up -> scroll_up ()
      | `Down -> scroll_down ()
-     | _ -> headline_screen t ((x, y), scroll))
+     | _ -> headline_screen t state)
   | `Key (`ASCII 'e', []) | `Key (`Enter, []) ->
     (* Editor might be set with extra args, in that case we need to separate these *)
     let[@warning "-8"] (editor :: args) =
@@ -67,13 +112,28 @@ let rec headline_screen t (((x, y) as pos), scroll) =
       match Unix.wait () with
       | _, _ ->
         Common.Term.cursor t None;
-        headline_screen t ((x, y), scroll)
+        headline_screen t state
       (* Capture resizing events *)
       | exception Unix.Unix_error (Unix.EINTR, _, _) -> run_editor ()
       | exception Unix.Unix_error (_, _, _) -> failwith "ERROR"
     in
     run_editor ()
-  | _ -> headline_screen t (pos, scroll)
+  | _ -> headline_screen t state
 
 
-let start () = headline_screen (Common.Term.create ()) ((0, 0), 0)
+let start (tag : string) () =
+  let tag = if String.equal tag "" then None else Some tag in
+  let content =
+    match tag with
+    | None -> Grep.get_headlines () |> Grep.parse_headlines
+    | Some tag -> Grep.get_tagged_headlines tag () |> Grep.parse_headlines
+  in
+  if Array.length content == 0
+  then (
+    print_endline "No entry for tag";
+    exit 0)
+  else (
+    let content_pretty = content |> Grep.pretty_format in
+    headline_screen
+      (Common.Term.create ())
+      { tag; pos = 0, 0; scroll = 0; content; content_pretty })
-- 
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