/*
** Default to using Markdown markup
*/
#define DEFAULT_FORUM_MIMETYPE  "text/x-markdown"

#if INTERFACE
/*
** Each instance of the following object represents a single message - 
** either the initial post, an edit to a post, a reply, or an edit to
** a reply.
*/
struct ForumEntry {
  int fpid;              /* rid for this entry */
  int fprev;             /* zero if initial entry.  non-zero if an edit */
  int firt;              /* This entry replies to firt */
  int mfirt;             /* Root in-reply-to */
  int nReply;            /* Number of replies to this entry */
  int sid;               /* Serial ID number */

  char *zUuid;           /* Artifact hash */


  ForumEntry *pLeaf;     /* Most recent edit for this entry */

  ForumEntry *pEdit;     /* This entry is an edit of pEdit */
  ForumEntry *pNext;     /* Next in chronological order */
  ForumEntry *pPrev;     /* Previous in chronological order */
  ForumEntry *pDisplay;  /* Next in display order */

  int nIndent;           /* Number of levels of indentation for this entry */
};

/*
** A single instance of the following tracks all entries for a thread.
*/
struct ForumThread {
  ForumEntry *pFirst;    /* First entry in chronological order */
  ForumEntry *pLast;     /* Last entry in chronological order */
  ForumEntry *pDisplay;  /* Entries in display order */
  ForumEntry *pTail;     /* Last on the display list */
  int mxIndent;          /* Maximum indentation level */
};
#endif /* INTERFACE */

/*
** Return true if the forum entry with the given rid has been
** subsequently edited.
*/
int forum_rid_has_been_edited(int rid){
  static Stmt q;
  int res;
  db_static_prepare(&q,
     "SELECT 1 FROM forumpost A, forumpost B"
     " WHERE A.fpid=$rid AND B.froot=A.froot AND B.fprev=$rid"
  );
  db_bind_int(&q, "$rid", rid);
  res = db_step(&q)==SQLITE_ROW;
  db_reset(&q);
  return res;
}

/*
** Delete a complete ForumThread and all its entries.
*/
static void forumthread_delete(ForumThread *pThread){
  ForumEntry *pEntry, *pNext;
  for(pEntry=pThread->pFirst; pEntry; pEntry = pNext){
    pNext = pEntry->pNext;
    fossil_free(pEntry->zUuid);
    fossil_free(pEntry);
  }
  fossil_free(pThread);
}

#if 0 /* not used */
/*
** Search a ForumEntry list forwards looking for the entry with fpid
*/
static ForumEntry *forumentry_forward(ForumEntry *p, int fpid){
  while( p && p->fpid!=fpid ) p = p->pNext;
  return p;
}
#endif

/*
** Search backwards for a ForumEntry
*/
static ForumEntry *forumentry_backward(ForumEntry *p, int fpid){
  while( p && p->fpid!=fpid ) p = p->pPrev;
  return p;
}

/*
** Add an entry to the display list
*/
static void forumentry_add_to_display(ForumThread *pThread, ForumEntry *p){
  if( pThread->pDisplay==0 ){
    pThread->pDisplay = p;
  }else{
    pThread->pTail->pDisplay = p;
  }
  pThread->pTail = p;
}

/*
** Extend the display list for pThread by adding all entries that
** reference fpid.  The first such entry will be no earlier then
** entry "p".
*/
static void forumthread_display_order(
  ForumThread *pThread,    /* The complete thread */
  ForumEntry *pBase        /* Add replies to this entry */
){
  ForumEntry *p;
  ForumEntry *pPrev = 0;

  for(p=pBase->pNext; p; p=p->pNext){


    if( p->fprev==0 && p->mfirt==pBase->fpid ){
      if( pPrev ){
        pPrev->nIndent = pBase->nIndent + 1;
        forumentry_add_to_display(pThread, pPrev);
        forumthread_display_order(pThread, pPrev);
      }
      pBase->nReply++;
      pPrev = p;

    }
  }
  if( pPrev ){
    pPrev->nIndent = pBase->nIndent + 1;
    if( pPrev->nIndent>pThread->mxIndent ) pThread->mxIndent = pPrev->nIndent;
    forumentry_add_to_display(pThread, pPrev);
    forumthread_display_order(pThread, pPrev);
  }
}

/*
** Construct a ForumThread object given the root record id.
*/
static ForumThread *forumthread_create(int froot, int computeHierarchy){
  ForumThread *pThread;

  ForumEntry *pEntry;
  Stmt q;
  int sid = 1;
  Bag seen = Bag_INIT;

  pThread = fossil_malloc( sizeof(*pThread) );
  memset(pThread, 0, sizeof(*pThread));
  db_prepare(&q,
     "SELECT fpid, firt, fprev, (SELECT uuid FROM blob WHERE rid=fpid)"
     "  FROM forumpost"
     " WHERE froot=%d ORDER BY fmtime",
     froot
  );
  while( db_step(&q)==SQLITE_ROW ){
    pEntry = fossil_malloc( sizeof(*pEntry) );
    memset(pEntry, 0, sizeof(*pEntry));
    pEntry->fpid = db_column_int(&q, 0);
    pEntry->firt = db_column_int(&q, 1);
    pEntry->fprev = db_column_int(&q, 2);
    pEntry->zUuid = fossil_strdup(db_column_text(&q,3));
    pEntry->mfirt = pEntry->firt;
    pEntry->sid = sid++;
    pEntry->pPrev = pThread->pLast;
    pEntry->pNext = 0;
    bag_insert(&seen, pEntry->fpid);
    if( pThread->pLast==0 ){
      pThread->pFirst = pEntry;
    }else{
      pThread->pLast->pNext = pEntry;
    }

    if( pEntry->firt && !bag_find(&seen,pEntry->firt) ){


      pEntry->firt = froot;



      pEntry->mfirt = froot;

    }
    pThread->pLast = pEntry;
  }
  db_finalize(&q);
  bag_clear(&seen);

  /* Establish which entries are the latest edit.  After this loop
  ** completes, entries that have non-NULL pLeaf should not be
  ** displayed.
  */
  for(pEntry=pThread->pFirst; pEntry; pEntry=pEntry->pNext){

    if( pEntry->fprev ){
      ForumEntry *pBase = 0, *p;
      p = forumentry_backward(pEntry->pPrev, pEntry->fprev);
      pEntry->pEdit = p;
      while( p ){
        pBase = p;
        p->pLeaf = pEntry;
        p = pBase->pEdit;
      }

      for(p=pEntry->pNext; p; p=p->pNext){
        if( p->mfirt==pEntry->fpid ) p->mfirt = pBase->fpid;

      }
    }
  }


  if( computeHierarchy ){
    /* Compute the hierarchical display order */
    pEntry = pThread->pFirst;
    pEntry->nIndent = 1;
    pThread->mxIndent = 1;
    forumentry_add_to_display(pThread, pEntry);
    forumthread_display_order(pThread, pEntry);
  }

  /* Return the result */
  return pThread;
}

/*

** This command is intended for testing an analysis only.
*/
void forumthread_cmd(void){
  int fpid;
  int froot;
  const char *zName;
  ForumThread *pThread;
  ForumEntry *p;

  db_find_and_open_repository(0,0);
  verify_all_options();
  if( g.argc==2 ){
    forum_thread_list();
    return;
  }

  fossil_print("fpid  = %d\n", fpid);
  fossil_print("froot = %d\n", froot);
  pThread = forumthread_create(froot, 1);
  fossil_print("Chronological:\n");
  fossil_print(
/* 0         1         2         3         4         5         6         7    */
/*  123456789 123456789 123456789 123456789 123456789 123456789 123456789 123 */
  " sid      fpid      firt     fprev     mfirt     pLeaf  nReply  hash\n");
  for(p=pThread->pFirst; p; p=p->pNext){
    fossil_print("%4d %9d %9d %9d %9d %9d  %6d  %8.8s\n", p->sid,
       p->fpid, p->firt, p->fprev, p->mfirt, p->pLeaf ? p->pLeaf->fpid : 0,

       p->nReply, p->zUuid);
  }
  fossil_print("\nDisplay\n");
  for(p=pThread->pDisplay; p; p=p->pDisplay){
    fossil_print("%*s", (p->nIndent-1)*3, "");
    if( p->pLeaf ){
      fossil_print("%d->%d\n", p->fpid, p->pLeaf->fpid);
    }else{
      fossil_print("%d\n", p->fpid);
    }
  }
  forumthread_delete(pThread);
}

    @ <i>Deleted</i>
  }
  if( zClass ){
    @ </div>
  }
}

/*
** Generate the buttons in the display that allow a forum supervisor to
** mark a user as trusted.  Only do this if:
**
**   (1)  The poster is an individual, not a special user like "anonymous"
**   (2)  The current user has Forum Supervisor privilege
*/
static void generateTrustControls(Manifest *pPost){
  if( !g.perm.AdminForum ) return;
  if( login_is_special(pPost->zUser) ) return;
  @ <br>
  @ <label><input type="checkbox" name="trust">
  @ Trust user "%h(pPost->zUser)"
  @ so that future posts by "%h(pPost->zUser)" do not require moderation.
  @ </label>
  @ <input type="hidden" name="trustuser" value="%h(pPost->zUser)">
}

/*
** Compute a display name from a login name.
**
** If the input login is found in the USER table, then check the USER.INFO
** field to see if it has display-name followed by an email address.
** If it does, that becomes the new display name.  If not, let the display
** name just be the login.

    zResult = fossil_strdup(zLogin);
  }
  db_reset(&q);
  return zResult;
}

/*
** Display all posts in a forum thread in chronological order
*/
static void forum_display_chronological(int froot, int target, int bRawMode){
  ForumThread *pThread = forumthread_create(froot, 0);
  ForumEntry *p;
  int notAnon = login_is_individual();
  char cMode = bRawMode ? 'r' : 'c';




  for(p=pThread->pFirst; p; p=p->pNext){

    char *zDate;

    Manifest *pPost;
    int isPrivate;        /* True for posts awaiting moderation */
    int sameUser;         /* True if author is also the reader */

    const char *zUuid;
    char *zDisplayName;   /* The display name */



    int sid;



    pPost = manifest_get(p->fpid, CFTYPE_FORUM, 0);
    if( pPost==0 ) continue;
    if( p->fpid==target ){
      @ <div id="forum%d(p->fpid)" class="forumTime forumSel">
    }else if( p->pLeaf!=0 ){
      @ <div id="forum%d(p->fpid)" class="forumTime forumObs">

    }else{
      @ <div id="forum%d(p->fpid)" class="forumTime">
    }



    if( pPost->zThreadTitle ){
      @ <h1>%h(pPost->zThreadTitle)</h1>
    }
    zDate = db_text(0, "SELECT datetime(%.17g)", pPost->rDate);

    zDisplayName = display_name_from_login(pPost->zUser);
    sid = p->pEdit ? p->pEdit->sid : p->sid;

    @ <h3 class='forumPostHdr'>(%d(sid)) By %h(zDisplayName) on %h(zDate)




    fossil_free(zDisplayName);
    fossil_free(zDate);



    if( p->pEdit ){

      @ edit of %z(href("%R/forumpost/%S?t=%c",p->pEdit->zUuid,cMode))\

      @ %d(p->pEdit->sid)</a>
    }


    if( g.perm.Debug ){
      @ <span class="debug">\
      @ <a href="%R/artifact/%h(p->zUuid)">(artifact-%d(p->fpid))</a></span>
    }
    if( p->firt ){
      ForumEntry *pIrt = p->pPrev;
      while( pIrt && pIrt->fpid!=p->firt ) pIrt = pIrt->pPrev;
      if( pIrt ){
        @ in reply to %z(href("%R/forumpost/%S?t=%c",pIrt->zUuid,cMode))\
        @ %d(pIrt->sid)</a>


      }

    }
    zUuid = p->zUuid;

    if( p->pLeaf ){
      @ updated by %z(href("%R/forumpost/%S?t=%c",p->pLeaf->zUuid,cMode))\
      @ %d(p->pLeaf->sid)</a>
      zUuid = p->pLeaf->zUuid;
    }
    if( p->fpid!=target ){


      @ %z(href("%R/forumpost/%S?t=%c",zUuid,cMode))[link]</a>
    }


    if( !bRawMode ){
      @ %z(href("%R/forumpost/%S?raw",zUuid))[source]</a>
    }
    isPrivate = content_is_private(p->fpid);
    sameUser = notAnon && fossil_strcmp(pPost->zUser, g.zLogin)==0;
    @ </h3>








    if( isPrivate && !g.perm.ModForum && !sameUser ){
      @ <p><span class="modpending">Awaiting Moderator Approval</span></p>
    }else{
      const char *zMimetype;
      if( bRawMode ){
        zMimetype = "text/plain";
      }else if( p->pLeaf!=0 ){
        zMimetype = "text/plain";
      }else{
        zMimetype = pPost->zMimetype;
      }
      forum_render(0, zMimetype, pPost->zWiki, 0, 1);
    }





    if( g.perm.WrForum && p->pLeaf==0 ){
      int sameUser = login_is_individual()
                     && fossil_strcmp(pPost->zUser, g.zLogin)==0;
      @ <div><form action="%R/forumedit" method="POST">
      @ <input type="hidden" name="fpid" value="%s(p->zUuid)">
      if( !isPrivate ){
        /* Reply and Edit are only available if the post has already
        ** been approved */
        @ <input type="submit" name="reply" value="Reply">
        if( g.perm.Admin || sameUser ){
          @ <input type="submit" name="edit" value="Edit">
          @ <input type="submit" name="nullout" value="Delete">
        }
      }else if( g.perm.ModForum ){
        /* Provide moderators with moderation buttons for posts that

        ** are pending moderation */
        @ <input type="submit" name="approve" value="Approve">
        @ <input type="submit" name="reject" value="Reject">


        generateTrustControls(pPost);




      }else if( sameUser ){
        /* A post that is pending moderation can be deleted by the
        ** person who originally submitted the post */
        @ <input type="submit" name="reject" value="Delete">
      }
      @ </form></div>
    }




    manifest_destroy(pPost);

    @ </div>










  }


































































































  /* Undocumented "threadtable" query parameter causes thread table
  ** to be displayed for debugging purposes.
  */
  if( PB("threadtable") ){
    @ <hr>
    @ <table border="1" cellpadding="3" cellspacing="0">
    @ <tr><th>sid<th>fpid<th>firt<th>fprev<th>mfirt<th>pLeaf<th>nReply<th>hash

    for(p=pThread->pFirst; p; p=p->pNext){
      @ <tr><td>%d(p->sid)<td>%d(p->fpid)<td>%d(p->firt)\
      @ <td>%d(p->fprev)<td>%d(p->mfirt)\




      @ <td>%d(p->pLeaf?p->pLeaf->fpid:0)<td>%d(p->nReply)\
      @ <td>%S(p->zUuid)</tr>
    }
    @ </table>
  }

  forumthread_delete(pThread);
}
/*
** Display all the edit history of post "target".
*/
static void forum_display_history(int froot, int target, int bRawMode){
  ForumThread *pThread = forumthread_create(froot, 0);
  ForumEntry *p;
  int notAnon = login_is_individual();
  char cMode = bRawMode ? 'r' : 'c';
  ForumEntry *pLeaf = 0;
  int cnt = 0;
  for(p=pThread->pFirst; p; p=p->pNext){
    if( p->fpid==target ){
      pLeaf = p->pLeaf ? p->pLeaf : p;
      break;
    }
  }
  for(p=pThread->pFirst; p; p=p->pNext){
    char *zDate;
    Manifest *pPost;
    int isPrivate;        /* True for posts awaiting moderation */
    int sameUser;         /* True if author is also the reader */
    const char *zUuid;
    char *zDisplayName;   /* The display name */

    if( p->fpid!=pLeaf->fpid && p->pLeaf!=pLeaf ) continue;
    cnt++;
    pPost = manifest_get(p->fpid, CFTYPE_FORUM, 0);
    if( pPost==0 ) continue;
    @ <div id="forum%d(p->fpid)" class="forumTime">
    zDate = db_text(0, "SELECT datetime(%.17g)", pPost->rDate);
    zDisplayName = display_name_from_login(pPost->zUser);
    @ <h3 class='forumPostHdr'>(%d(p->sid)) By %h(zDisplayName) on %h(zDate)
    fossil_free(zDisplayName);
    fossil_free(zDate);
    if( g.perm.Debug ){
      @ <span class="debug">\
      @ <a href="%R/artifact/%h(p->zUuid)">(artifact-%d(p->fpid))</a></span>
    }
    if( p->firt && cnt==1 ){
      ForumEntry *pIrt = p->pPrev;
      while( pIrt && pIrt->fpid!=p->firt ) pIrt = pIrt->pPrev;
      if( pIrt ){
        @ in reply to %z(href("%R/forumpost/%S?t=%c",pIrt->zUuid,cMode))\
        @ %d(pIrt->sid)</a>
      }
    }
    zUuid = p->zUuid;
    @ %z(href("%R/forumpost/%S?t=c",zUuid))[link]</a>
    if( !bRawMode ){
      @ %z(href("%R/forumpost/%S?raw",zUuid))[source]</a>
    }
    isPrivate = content_is_private(p->fpid);
    sameUser = notAnon && fossil_strcmp(pPost->zUser, g.zLogin)==0;
    @ </h3>
    if( isPrivate && !g.perm.ModForum && !sameUser ){
      @ <p><span class="modpending">Awaiting Moderator Approval</span></p>
    }else{
      forum_render(0, bRawMode?"text/plain":pPost->zMimetype, pPost->zWiki,
                   0, 1);
    }
    if( g.perm.WrForum && p->pLeaf==0 ){
      int sameUser = login_is_individual()
                     && fossil_strcmp(pPost->zUser, g.zLogin)==0;
      @ <div><form action="%R/forumedit" method="POST">
      @ <input type="hidden" name="fpid" value="%s(p->zUuid)">
      if( !isPrivate ){
        /* Reply and Edit are only available if the post has already
        ** been approved */
        @ <input type="submit" name="reply" value="Reply">
        if( g.perm.Admin || sameUser ){
          @ <input type="submit" name="edit" value="Edit">
          @ <input type="submit" name="nullout" value="Delete">
        }
      }else if( g.perm.ModForum ){
        /* Provide moderators with moderation buttons for posts that
        ** are pending moderation */
        @ <input type="submit" name="approve" value="Approve">
        @ <input type="submit" name="reject" value="Reject">
        generateTrustControls(pPost);
      }else if( sameUser ){
        /* A post that is pending moderation can be deleted by the
        ** person who originally submitted the post */
        @ <input type="submit" name="reject" value="Delete">
      }
      @ </form></div>
    }
    manifest_destroy(pPost);
    @ </div>
  }
  forumthread_delete(pThread);
}

/*
** Display all messages in a forumthread with indentation.
*/
static int forum_display_hierarchical(int froot, int target){
  ForumThread *pThread;
  ForumEntry *p;
  Manifest *pPost, *pOPost;
  int fpid;
  const char *zUuid;
  char *zDate;
  const char *zSel;
  int notAnon = login_is_individual();
  int iIndentScale = 4;

  pThread = forumthread_create(froot, 1);
  for(p=pThread->pFirst; p; p=p->pNext){
    if( p->fpid==target ){
      while( p->pEdit ) p = p->pEdit;
      target = p->fpid;
      break;
    }
  }
  while( iIndentScale>1 && iIndentScale*pThread->mxIndent>25 ){
    iIndentScale--;
  }
  for(p=pThread->pDisplay; p; p=p->pDisplay){
    int isPrivate;         /* True for posts awaiting moderation */
    int sameUser;          /* True if reader is also the poster */
    char *zDisplayName;    /* User name to be displayed */
    pOPost = manifest_get(p->fpid, CFTYPE_FORUM, 0);
    if( p->pLeaf ){
      fpid = p->pLeaf->fpid;
      zUuid = p->pLeaf->zUuid;
      pPost = manifest_get(fpid, CFTYPE_FORUM, 0);
    }else{
      fpid = p->fpid;
      zUuid = p->zUuid;
      pPost = pOPost;
    }
    zSel = p->fpid==target ? " forumSel" : "";
    if( p->nIndent==1 ){
      @ <div id='forum%d(fpid)' class='forumHierRoot%s(zSel)'>
    }else{
      @ <div id='forum%d(fpid)' class='forumHier%s(zSel)' \
      @ style='margin-left: %d((p->nIndent-1)*iIndentScale)ex;'>
    }
    if( pPost==0 ) continue;
    if( pPost->zThreadTitle ){
      @ <h1>%h(pPost->zThreadTitle)</h1>
    }
    zDate = db_text(0, "SELECT datetime(%.17g)", pOPost->rDate);
    zDisplayName = display_name_from_login(pOPost->zUser);
    @ <h3 class='forumPostHdr'>\
    @ (%d(p->sid)) By %h(zDisplayName) on %h(zDate)
    fossil_free(zDisplayName);
    fossil_free(zDate);
    if( g.perm.Debug ){
      @ <span class="debug">\
      @ <a href="%R/artifact/%h(p->zUuid)">(artifact-%d(p->fpid))</a></span>
    }
    if( p->pLeaf ){
      zDate = db_text(0, "SELECT datetime(%.17g)", pPost->rDate);
      if( fossil_strcmp(pOPost->zUser,pPost->zUser)==0 ){
        @ and edited on %h(zDate)
      }else{
        @ as edited by %h(pPost->zUser) on %h(zDate)
      }
      fossil_free(zDate);
      if( g.perm.Debug ){
        @ <span class="debug">\
        @ <a href="%R/artifact/%h(p->pLeaf->zUuid)">\
        @ (artifact-%d(p->pLeaf->fpid))</a></span>
      }
      @ %z(href("%R/forumpost/%S?t=y",p->zUuid))[history]</a>
      manifest_destroy(pOPost);
    }
    if( fpid!=target ){
      @ %z(href("%R/forumpost/%S",zUuid))[link]</a>
    }
    @ %z(href("%R/forumpost/%S?raw",zUuid))[source]</a>
    if( p->firt ){
      ForumEntry *pIrt = p->pPrev;
      while( pIrt && pIrt->fpid!=p->mfirt ) pIrt = pIrt->pPrev;
      if( pIrt ){
        @ in reply to %z(href("%R/forumpost/%S?t=h",pIrt->zUuid))\
        @ %d(pIrt->sid)</a>
      }
    }
    @ </h3>
    isPrivate = content_is_private(fpid);
    sameUser = notAnon && fossil_strcmp(pPost->zUser, g.zLogin)==0;
    if( isPrivate && !g.perm.ModForum && !sameUser ){
      @ <p><span class="modpending">Awaiting Moderator Approval</span></p>
    }else{
      forum_render(0, pPost->zMimetype, pPost->zWiki, 0, 1);
    }
    if( g.perm.WrForum ){
      @ <div><form action="%R/forumedit" method="POST">
      @ <input type="hidden" name="fpid" value="%s(zUuid)">
      if( !isPrivate ){
        /* Reply and Edit are only available if the post has already
        ** been approved */
        @ <input type="submit" name="reply" value="Reply">
        if( g.perm.Admin || sameUser ){
          @ <input type="submit" name="edit" value="Edit">
          @ <input type="submit" name="nullout" value="Delete">
        }
      }else if( g.perm.ModForum ){
        /* Provide moderators with moderation buttons for posts that
        ** are pending moderation */
        @ <input type="submit" name="approve" value="Approve">
        @ <input type="submit" name="reject" value="Reject">
        generateTrustControls(pPost);
      }else if( sameUser ){
        /* A post that is pending moderation can be deleted by the
        ** person who originally submitted the post */
        @ <input type="submit" name="reject" value="Delete">
      }
      @ </form></div>
    }
    manifest_destroy(pPost);
    @ </div>
  }
  forumthread_delete(pThread);
  return target;
}

/*
** Emits all JS code required by /forumpost.
*/
static void forumpost_emit_page_js(){
  static int once = 0;
  if(0==once){
    once = 1;
    style_emit_script_fossil_bootstrap(1);
    builtin_request_js("forum.js");
    builtin_request_js("fossil.dom.js");
    builtin_request_js("fossil.page.forumpost.js");
  }
}

/*
** WEBPAGE: forumpost
**
** Show a single forum posting. The posting is shown in context with
** it's entire thread.  The selected posting is enclosed within
** <div class='forumSel'>...</div>.  Javascript is used to move the
** selected posting into view after the page loads.
**
** Query parameters:
**
**   name=X        REQUIRED.  The hash of the post to display
**   t=MODE        Display mode.
**                   'c' for chronological
**                   'h' for hierarchical
**                   'a' for automatic
**                   'r' for raw
**                   'y' for history of post X only


**   raw           If present, show only the post specified and



**                 show its original unformatted source text.


*/
void forumpost_page(void){
  forumthread_page();
}

/*
** Add an appropriate style_header() to include title of the
** given forum post.
*/
static int forumthread_page_header(int froot, int fpid){
  char *zThreadTitle = 0;

  zThreadTitle = db_text("",
    "SELECT"
    " substr(event.comment,instr(event.comment,':')+2)"
    " FROM forumpost, event"
    " WHERE event.objid=forumpost.fpid"
    "   AND forumpost.fpid=%d;",
    fpid
  );
  style_header("%s%s", zThreadTitle, zThreadTitle[0] ? "" : "Forum");
  fossil_free(zThreadTitle);
  return 0;
}

/*
** WEBPAGE: forumthread
**
** Show all forum messages associated with a particular message thread.
** The result is basically the same as /forumpost except that none of
** the postings in the thread are selected.
**
** Query parameters:
**
**   name=X        REQUIRED.  The hash of any post of the thread.
**   t=MODE        Display mode. MODE is...
**                   'c' for chronological, or
**                   'h' for hierarchical, or
**                   'a' for automatic, or
**                   'r' for raw.


**   raw           Show only the post given by name= and show it unformatted
**   hist          Show only the edit history for the name= post
*/
void forumthread_page(void){
  int fpid;
  int froot;

  const char *zName = P("name");
  const char *zMode = PD("t","a");
  int bRaw = PB("raw");



  login_check_credentials();
  if( !g.perm.RdForum ){
    login_needed(g.anon.RdForum);
    return;
  }
  if( zName==0 ){
    webpage_error("Missing \"name=\" query parameter");
  }
  fpid = symbolic_name_to_rid(zName, "f");
  if( fpid<=0 ){
    webpage_error("Unknown or ambiguous forum id: \"%s\"", zName);
  }
  froot = db_int(0, "SELECT froot FROM forumpost WHERE fpid=%d", fpid);
  if( froot==0 ){
    webpage_error("Not a forum post: \"%s\"", zName);
  }
  if( fossil_strcmp(g.zPath,"forumthread")==0 ) fpid = 0;
  if( zMode[0]=='a' ){

    if( cgi_from_mobile() ){
      zMode = "c";  /* Default to chronological on mobile */





    }else{
      zMode = "h";







    }






  }
  if( zMode[0]!='y' ){
    forumthread_page_header(froot, fpid);
  }
  if( bRaw && fpid ){
    Manifest *pPost;
    pPost = manifest_get(fpid, CFTYPE_FORUM, 0);
    if( pPost==0 ){
      @ <p>No such forum post: %h(zName)
    }else{
      int isPrivate = content_is_private(fpid);

      int notAnon = login_is_individual();
      int sameUser = notAnon && fossil_strcmp(pPost->zUser, g.zLogin)==0;
      if( isPrivate && !g.perm.ModForum && !sameUser ){
        @ <p><span class="modpending">Awaiting Moderator Approval</span></p>
      }else{


        forum_render(0, "text/plain", pPost->zWiki, 0, 0);
      }



      manifest_destroy(pPost);





    }
  }else if( zMode[0]=='c' ){
    style_submenu_element("Hierarchical", "%R/%s/%s?t=h", g.zPath, zName);


    style_submenu_element("Unformatted", "%R/%s/%s?t=r", g.zPath, zName);
    forum_display_chronological(froot, fpid, 0);
  }else if( zMode[0]=='r' ){
    style_submenu_element("Chronological", "%R/%s/%s?t=c", g.zPath, zName);
    style_submenu_element("Hierarchical", "%R/%s/%s?t=h", g.zPath, zName);

    forum_display_chronological(froot, fpid, 1);
  }else if( zMode[0]=='y' ){
    style_header("Edit History Of A Forum Post");
    style_submenu_element("Complete Thread", "%R/%s/%s?t=a", g.zPath, zName);
    forum_display_history(froot, fpid, 1);
  }else{
    style_submenu_element("Chronological", "%R/%s/%s?t=c", g.zPath, zName);
    style_submenu_element("Unformatted", "%R/%s/%s?t=r", g.zPath, zName);

    forum_display_hierarchical(froot, fpid);
  }
  forumpost_emit_page_js();
  style_footer();
}

/*
** Return true if a forum post should be moderated.
*/
static int forum_need_moderation(void){

    iBasis = iInReplyTo;
  }
  webpage_assert( (zTitle==0)+(iInReplyTo==0)==1 );
  blob_init(&x, 0, 0);
  zDate = date_in_standard_format("now");
  blob_appendf(&x, "D %s\n", zDate);
  fossil_free(zDate);
  zG = db_text(0, 
     "SELECT uuid FROM blob, forumpost"
     " WHERE blob.rid==forumpost.froot"
     "   AND forumpost.fpid=%d", iBasis);
  if( zG ){
    blob_appendf(&x, "G %s\n", zG);
    fossil_free(zG);
  }

    return 1;
  }
}

/*
** Paint the form elements for entering a Forum post
*/
static void forum_entry_widget(
  const char *zTitle,
  const char *zMimetype,
  const char *zContent
){
  if( zTitle ){
    @ Title: <input type="input" name="title" value="%h(zTitle)" size="50"
    @ maxlength="125"><br>

    @ <h1>Preview:</h1>
    forum_render(zTitle, zMimetype, zContent, "forumEdit", 1);
  }
  style_header("New Forum Thread");
  @ <form action="%R/forume1" method="POST">
  @ <h1>New Thread:</h1>
  forum_from_line();
  forum_entry_widget(zTitle, zMimetype, zContent);
  @ <input type="submit" name="preview" value="Preview">
  if( P("preview") && !whitespace_only(zContent) ){
    @ <input type="submit" name="submit" value="Submit">
  }else{
    @ <input type="submit" name="submit" value="Submit" disabled>
  }
  if( g.perm.Debug ){

                      "WHERE login=%Q AND cap NOT GLOB '*4*'",
                      zUserToTrust);
      }
      cgi_redirectf("%R/forumpost/%S",P("fpid"));
      return;
    }
    if( P("reject") ){
      char *zParent = 
        db_text(0,
          "SELECT uuid FROM forumpost, blob"
          " WHERE forumpost.fpid=%d AND blob.rid=forumpost.firt",
          fpid
        );
      moderation_disapprove(fpid);
      if( zParent ){

      forum_render(zTitle, zMimetype, zContent,"forumEdit", 1);
    }
    @ <h2>Revised Message:</h2>
    @ <form action="%R/forume2" method="POST">
    @ <input type="hidden" name="fpid" value="%h(P("fpid"))">
    @ <input type="hidden" name="edit" value="1">
    forum_from_line();
    forum_entry_widget(zTitle, zMimetype, zContent);
  }else{
    /* Reply */
    char *zDisplayName;
    zMimetype = PD("mimetype",DEFAULT_FORUM_MIMETYPE);
    zContent = PDT("content","");
    style_header("Reply");
    if( pRootPost->zThreadTitle ){

      forum_render(0, zMimetype,zContent, "forumEdit", 1);
    }
    @ <h2>Enter Reply:</h2>
    @ <form action="%R/forume2" method="POST">
    @ <input type="hidden" name="fpid" value="%h(P("fpid"))">
    @ <input type="hidden" name="reply" value="1">
    forum_from_line();
    forum_entry_widget(0, zMimetype, zContent);
  }
  if( !isDelete ){
    @ <input type="submit" name="preview" value="Preview">
  }
  @ <input type="submit" name="cancel" value="Cancel">
  if( (P("preview") && !whitespace_only(zContent)) || isDelete ){
    @ <input type="submit" name="submit" value="Submit">

      zOut[j] = 0;
      if( j<=0 && omitline ){
        fprintf(out,"\n");
      }else{
        fprintf(out,"%*s\"%s%s\"\n",indent, "", zOut, zNewline);
      }
    }else{
      /* Otherwise (if the last non-whitespace was not '=') then generate
      ** a cgi_printf() statement whose format is the text following the '@'.
      ** Substrings of the form "%C(...)" (where C is any sequence of
      ** characters other than \000 and '(') will put "%C" in the
      ** format and add the "(...)" as an argument to the cgi_printf call.




      */
      const char *zNewline = "\\n";
      int indent;
      int nC;

      char c;
      i++;
      if( isspace(zLine[i]) ){ i++; }
      indent = i;
      for(j=0; zLine[i] && zLine[i]!='\r' && zLine[i]!='\n'; i++){
        if( zLine[i]=='\\' && (!zLine[i+1] || zLine[i+1]=='\r'
                                           || zLine[i+1]=='\n') ){
          zNewline = "";
          break;
        }
        if( zLine[i]=='"' || zLine[i]=='\\' ){ zOut[j++] = '\\'; }
        zOut[j++] = zLine[i];
        if( zLine[i]!='%' || zLine[i+1]=='%' || zLine[i+1]==0 ) continue;

        for(nC=1; zLine[i+nC] && zLine[i+nC]!='('; nC++){}


        if( zLine[i+nC]!='(' || !isalpha(zLine[i+nC-1]) ) continue;
        while( --nC ) zOut[j++] = zLine[++i];

        zArg[nArg++] = ',';
        k = 0; i++;

        while( (c = zLine[i])!=0 ){
          zArg[nArg++] = c;
          if( c==')' ){
            k--;
            if( k==0 ) break;
          }else if( c=='(' ){
            k++;
          }
          i++;
        }

      }
      zOut[j] = 0;
      if( !inPrint ){
        fprintf(out,"%*scgi_printf(\"%s%s\"",indent-2,"", zOut, zNewline);
        inPrint = 1;
      }else{
        fprintf(out,"\n%*s\"%s%s\"",indent+5, "", zOut, zNewline);

  char zSrc[60];
  int nSrc;
  int i;
  char z[60];

  /* Source characters for the password.  Omit characters like "0", "O",
  ** "1" and "I"  that might be easily confused */
  static const char zAlphabet[] = 
           /*  0         1         2         3         4         5       */
           /*   123456789 123456789 123456789 123456789 123456789 123456 */
              "23456789abcdefghijkmnopqrstuvwxyzABCDEFGHJKLMNPQRSTUVWXYZ";

  if( N<8 ) N = 8;
  else if( N>sizeof(zAlphabet)-2 ) N = sizeof(zAlphabet)-2;
  nSrc = sizeof(zAlphabet) - 1;

void test_random_password(void){
  int N = 10;
  if( g.argc>=3 ){
    N = atoi(g.argv[2]);
  }
  fossil_print("%s\n", fossil_random_password(N));
}