Add Completion module and emoji completion hook

Note: this doesn't enable emoji completion.

Weechat seems to require hooking on the commands
  /input complete_*
rather than just invoking hook_completion.

Makefile

@@ -19,6 +19,7 @@ SRCS=slack.c \
 	 slack-channel.c \
 	 slack-config.c \
 	 slack-command.c \
+	 slack-completion.c \
 	 slack-emoji.c \
 	 slack-input.c \
 	 slack-message.c \

slack-completion.c

@@ -0,0 +1,20 @@
+// This Source Code Form is subject to the terms of the Mozilla Public
+// License, version 2.0. If a copy of the MPL was not distributed with this
+// file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+#include <string.h>
+
+#include "weechat-plugin.h"
+#include "slack.h"
+#include "slack-emoji.h"
+#include "slack-workspace.h"
+#include "slack-channel.h"
+#include "slack-completion.h"
+
+void slack_completion_init()
+{
+    weechat_hook_completion("slack_emoji",
+                            N_("slack emoji"),
+                            &slack_emoji_complete_by_name_cb,
+                            NULL, NULL);
+}

slack-completion.h

@@ -0,0 +1,10 @@
+// This Source Code Form is subject to the terms of the Mozilla Public
+// License, version 2.0. If a copy of the MPL was not distributed with this
+// file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+#ifndef _SLACK_COMPLETION_H_
+#define _SLACK_COMPLETION_H_
+
+void slack_completion_init();
+
+#endif /*SLACK_COMPLETION_H*/

slack-emoji.c

@@ -2,6 +2,7 @@
 // License, version 2.0. If a copy of the MPL was not distributed with this
 // file, You can obtain one at http://mozilla.org/MPL/2.0/.
 
+#include <stdlib.h>
 #include <string.h>
 
 #include "weechat-plugin.h"
@@ -10,6 +11,8 @@
 
 #include "slack-emoji.inc"
 
+#define MIN(a,b) (((a)<(b))?(a):(b))
+
 static int emoji_byname_cmp(const void *p1, const void *p2)
 {
     return strcasecmp(((struct t_slack_emoji_by_name *)p1)->name,
@@ -22,6 +25,88 @@ static int emoji_bytext_cmp(const void *p1, const void *p2)
                       ((struct t_slack_emoji_by_text *)p2)->text);
 }
 
+static size_t levenshtein_dist(const char *s, size_t len_s, const char *t, size_t len_t)
+{ 
+    size_t cost;
+
+    /* base case: empty strings */
+    if (len_s == 0) return len_t;
+    if (len_t == 0) return len_s;
+
+    /* test if last characters of the strings match */
+    if (s[len_s-1] == t[len_t-1])
+        cost = 0;
+    else
+        cost = 1;
+
+    /* delete char from s, delete char from t, and delete char from both */
+    size_t delete  = levenshtein_dist(s, len_s - 1, t, len_t    ) + 1;
+    size_t insert  = levenshtein_dist(s, len_s    , t, len_t - 1) + 1;
+    size_t replace = levenshtein_dist(s, len_s - 1, t, len_t - 1) + cost;
+    return MIN( MIN( delete, insert ), replace );
+}
+
+static size_t wagner_fischer(const char *src, const char *targ)
+{
+	size_t len = strlen(targ) + 1;
+	size_t above[len], below[len];
+	for (size_t *k = above, c = 0; k < above+len; ++k, ++c) *k=c;
+
+	const char *src_at = src, *targ_at;
+	for (size_t j = 1; j < strlen(src)+1; ++j)
+	{
+		*below = j;
+		targ_at = targ;
+		for (size_t *d = above, *a = above+1, *l = below, *c = below + 1;
+             c < below + len; ++d, ++a, ++l, ++c)
+		{
+			*c = MIN( *src_at == *targ_at ? *d : *d + 1, MIN( *a + 1, *l + 1 ) );
+			++targ_at;
+		}
+		for (size_t *a = above, *b = below; a < above + len; ++a, ++b) *a = *b;
+		++src_at;
+	}
+
+	return above[len-1];
+}
+
+int slack_emoji_complete_by_name_cb(const void *pointer, void *data,
+                                    const char *completion_item,
+                                    struct t_gui_buffer *buffer,
+                                    struct t_gui_completion *completion)
+{
+    struct t_slack_emoji_by_name *closest_emoji;
+
+    (void) pointer;
+    (void) data;
+
+    weechat_printf(NULL, "Completing!");
+    
+    size_t i, emoji_count = sizeof(slack_emoji_by_name)
+        / sizeof(struct t_slack_emoji_by_name);
+    closest_emoji = malloc(sizeof(slack_emoji_by_name));
+    memcpy(closest_emoji, slack_emoji_by_name,
+           sizeof(slack_emoji_by_name));
+
+    int edit_dist_cmp(const void *p1, const void *p2)
+    {
+        return 0;
+    };
+    qsort(closest_emoji, emoji_count,
+          sizeof(struct t_slack_emoji_by_name),
+          edit_dist_cmp);
+
+    for (i = 0; i < emoji_count; i++)
+    {
+        weechat_printf(NULL, closest_emoji[i].name);
+        weechat_hook_completion_list_add(completion, closest_emoji[i].name,
+                                         0, WEECHAT_LIST_POS_END);
+    }
+
+    free(closest_emoji);
+    return WEECHAT_RC_OK;
+}
+
 const char *slack_emoji_get_unicode_by_name(const char *name)
 {
     struct t_slack_emoji_by_name *result;
@@ -70,7 +155,7 @@ const char *slack_emoji_get_text_by_name(const char *name)
     return result->text_to;
 }
 
-const char *slack_emoji_get_text_by_text(const char *text)
+const char *slack_emoji_get_name_by_text(const char *text)
 {
     struct t_slack_emoji_by_text *result;
     struct t_slack_emoji_by_text key;
@@ -83,5 +168,5 @@ const char *slack_emoji_get_text_by_text(const char *text)
         sizeof(struct t_slack_emoji_by_text),
         emoji_bytext_cmp);
     
-    return result->text_to;
+    return result->name_to;
 }

slack-emoji.h

@@ -5,12 +5,17 @@
 #ifndef _SLACK_EMOJI_H_
 #define _SLACK_EMOJI_H_
 
+int slack_emoji_complete_by_name_cb(const void *pointer, void *data,
+                                    const char *completion_item,
+                                    struct t_gui_buffer *buffer,
+                                    struct t_gui_completion *completion);
+
 const char *slack_emoji_get_unicode_by_name(const char *name);
 
 const char *slack_emoji_get_unicode_by_text(const char *text);
 
 const char *slack_emoji_get_text_by_name(const char *name);
     
-const char *slack_emoji_get_text_by_text(const char *text);
+const char *slack_emoji_get_name_by_text(const char *text);
 
 #endif /*SLACK_EMOJI_H*/

slack-emoji.pl

@@ -51,16 +51,21 @@ my %byname = map { my $o = $_; map {($_, $o)} @{$o->{'short_names'}} } @array;
 my @sortedbyname = sort { $a cmp $b } keys %byname;
 foreach my $name (@sortedbyname)
 {
-    my $_0 = "\"$name\"";
+    my $_0 = "\":$name:\"";
     my @_1 = split /-/, $byname{$name}->{'unified'};
     my $_1 = "\"";
-    foreach my $codepoint (@_1) { $_1 .= "\\u$codepoint" };
+    foreach my $codepoint (@_1) {
+        if (hex $codepoint < 0xA0) { $_1 .= chr hex $codepoint } else { $_1 .= "\\u$codepoint" }
+    };
     $_1 .= "\"";
+    $_1 =~ tr/A-Za-z/a-za-z/;
     my $_2 = $byname{$name}->{'text'};
     if (defined $_2) { $_2 = "\"$_2\"" } else { $_2 = "NULL" };
+    $_2 =~ s/\\/\\\\/g;
     my $_3 = "{";
     foreach my $text (@{$byname{$name}->{'texts'}}) { if (defined $text) { $_3 .= "\"$text\", " } };
     $_3 .= "NULL}";
+    $_3 =~ s/\\/\\\\/g;
     print "$c { $_0, $_1, $_2, $_3 }";
     $c = ',';
 }
@@ -73,14 +78,18 @@ my @sortedbytext = sort { $a cmp $b } keys %bytext;
 foreach my $text (@sortedbytext)
 {
     my $_0 = "\"$text\"";
+    $_0 =~ s/\\/\\\\/g;
     my @_1 = split /-/, $bytext{$text}->{'unified'};
     my $_1 = "\"";
-    foreach my $codepoint (@_1) { $_1 .= "\\u$codepoint" };
+    foreach my $codepoint (@_1) {
+        if (hex $codepoint < 0xA0) { $_1 .= chr hex $codepoint } else { $_1 .= "\\u$codepoint" }
+    };
     $_1 .= "\"";
+    $_1 =~ tr/A-Za-z/a-za-z/;
     my $_2 = $bytext{$text}->{'short_name'};
-    if (defined $_2) { $_2 = "\"$_2\"" } else { $_2 = "NULL" };
+    if (defined $_2) { $_2 = "\":$_2:\"" } else { $_2 = "NULL" };
     my $_3 = "{";
-    foreach my $name (@{$bytext{$text}->{'short_names'}}) { if (defined $name) { $_3 .= "\"$name\", " } };
+    foreach my $name (@{$bytext{$text}->{'short_names'}}) { if (defined $name) { $_3 .= "\":$name:\", " } };
     $_3 .= "NULL}";
     print "$c { $_0, $_1, $_2, $_3 }";
     $c = ',';

slack-emoji.py

@@ -1,5 +1,4 @@
-#!/usr/bin/python
+#!/usr/bin/env python3
-# Compatible with python v2 and v3
 
 # This Source Code Form is subject to the terms of the Mozilla Public
 # License, version 2.0. If a copy of the MPL was not distributed with this
@@ -38,7 +37,7 @@ struct t_slack_emoji_by_text {
      max(len(o['short_names'] if o['short_names'] else []) for o in emoji) + 1))
 print("static struct t_slack_emoji_by_name slack_emoji_by_name[] =")
 print("{"+"\n".join(", {{ {0}, {1}, {2}, {3} }}".format(
-    json.dumps(name),
+    json.dumps(":"+name+":"),
     json.dumps(ast.parse("\"\\u"+"\\u".join(o['unified'].split('-'))+"\"", mode='eval').body.s),
     json.dumps(o['text']),
     "{"+json.dumps(o['texts']+[None] if o['texts'] else [None])[1:-1]+"}")
@@ -51,8 +50,9 @@ print("static struct t_slack_emoji_by_text slack_emoji_by_text[] =")
 print("{"+"\n".join(", {{ {0}, {1}, {2}, {3} }}".format(
     json.dumps(text),
     json.dumps(ast.parse("\"\\u"+"\\u".join(o['unified'].split('-'))+"\"", mode='eval').body.s),
-    json.dumps(o['short_name']),
+    json.dumps(":"+o['short_name']+":"),
-    "{"+json.dumps(o['short_names']+[None] if o['short_names'] else [None])[1:-1]+"}")
+    "{"+json.dumps(list(map(lambda name: ":"+name+":", o['short_names']))+[None]
+                   if o['short_names'] else [None])[1:-1]+"}")
                     for o,text in sorted(((o,text) for o in emoji if o['texts'] for text in o['texts']),
                                          key=lambda x:x[1])
 ).replace("null", "NULL")[1:])

slack.c

@@ -15,6 +15,7 @@
 #include "slack-workspace.h"
 #include "slack-api.h"
 #include "slack-buffer.h"
+#include "slack-completion.h"
 
 
 WEECHAT_PLUGIN_NAME(SLACK_PLUGIN_NAME);
@@ -49,7 +50,7 @@ int weechat_plugin_init(struct t_weechat_plugin *plugin, int argc, char *argv[])
 
     weechat_plugin = plugin;
 
-    lws_set_log_level(LLL_ERR | LLL_WARN | LLL_NOTICE /*| LLL_INFO | LLL_DEBUG
+    lws_set_log_level(LLL_ERR | LLL_WARN /*| LLL_NOTICE | LLL_INFO | LLL_DEBUG
             | LLL_PARSER | LLL_HEADER | LLL_EXT | LLL_CLIENT
             | LLL_LATENCY | LLL_USER | LLL_COUNT*/,
             slack_lwsl_emit_weechat);
@@ -63,6 +64,8 @@ int weechat_plugin_init(struct t_weechat_plugin *plugin, int argc, char *argv[])
 
     slack_api_init();
 
+    slack_completion_init();
+
     slack_hook_timer = weechat_hook_timer(0.1 * 1000, 0, 0,
                                           &slack_workspace_timer_cb,
                                           NULL, NULL);