forked from mirrors/treebird
127 lines
3.8 KiB
C
127 lines
3.8 KiB
C
/*
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* Treebird - Lightweight frontend for Pleroma
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* Copyright (C) 2022 Nekobit
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Affero General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Affero General Public License for more details.
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*
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* You should have received a copy of the GNU Affero General Public License
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* along with this program. If not, see <https://www.gnu.org/licenses/>.
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*/
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#include <pcre.h>
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#include <stdlib.h>
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#include <string.h>
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#include "reply.h"
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#include "easprintf.h"
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#include "../config.h"
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// Pages
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#include "../static/post.ctmpl"
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#define ID_REPLY_SIZE 256
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#define ID_RESPONSE "<input type=\"hidden\" name=\"replyid\" value=\"%s\">"
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char* construct_post_box(char* reply_id,
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char* default_content,
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size_t* size)
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{
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char* reply_html;
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char id_reply[ID_REPLY_SIZE];
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// Put hidden post request
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snprintf(id_reply, ID_REPLY_SIZE, ID_RESPONSE, reply_id);
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// Construct box
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struct post_template tdata = {
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.prefix = config_url_prefix,
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.reply_input = reply_id ? id_reply : NULL,
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.content = default_content
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};
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return tmpl_gen_post(&tdata, size);
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}
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/* Some comments:
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* - Misskey does not return <span>, but we still regex to make sure it's a highlight
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* - The order of parameters in a tag can be changed (mastodon does this),
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* so we just grep for regex href
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* - Misskey/Mastodon adds an @ symbol in the href param, while pleroma adds /users
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*/
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#define REGEX_REPLY "<a .*?href=\"https?:\\/\\/(.*?)\\/(?:@|users/)?(.*?)?\".*?>@(?:<span>)?.*?(?:<\\/span>)?"
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#define REGEX_RESULTS_LEN 9
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char* reply_status(char* id, struct mstdnt_status* status)
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{
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char* content = status->content;
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size_t content_len = strlen(status->content);
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char* stat_reply;
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// Regex
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pcre* re;
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int re_results[REGEX_RESULTS_LEN];
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int rc;
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const char* error;
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int erroffset;
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int url_off, url_len, name_off, name_len;
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// Replies
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size_t replies_size, replies_size_orig;
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char* replies = malloc(replies_size = strlen(status->account.acct)+2);
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// Load first reply
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replies[0] = '@';
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strcpy(replies+1, status->account.acct);
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replies[replies_size-1] = ' ';
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// Compile regex
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re = pcre_compile(REGEX_REPLY, 0, &error, &erroffset, NULL);
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if (re == NULL)
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{
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fprintf(stderr, "Couldn't parse regex at offset %d: %s\n", erroffset, error);
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free(replies);
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pcre_free(re);
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}
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for (int ind = 0;;)
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{
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rc = pcre_exec(re, NULL, content, content_len, ind, 0, re_results, REGEX_RESULTS_LEN);
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if (rc < 0)
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break;
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// Store to last result
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ind = re_results[5];
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// Read out
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url_off = re_results[2];
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url_len = re_results[3] - url_off;
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name_off = re_results[4];
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name_len = re_results[5] - name_off;
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// Is this the same as us?
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replies_size_orig = replies_size;
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replies_size += url_len+name_len+3;
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// Realloc string
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replies = realloc(replies, replies_size+1);
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replies[replies_size_orig] = '@';
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memcpy(replies + replies_size_orig + 1, content + name_off, name_len);
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replies[replies_size_orig+1+name_len] = '@';
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memcpy(replies + replies_size_orig + 1 + name_len + 1, content + url_off, url_len);
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replies[replies_size-1] = ' ';
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}
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replies[replies_size-1] = '\0';
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stat_reply = construct_post_box(id, replies, NULL);
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if (replies) free(replies);
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pcre_free(re);
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return stat_reply;
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}
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