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/*
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 * Read a Wiki history file.
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 * It's a title line then a sequence of Wiki files separated by headers.
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 *
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 * Ddate/time
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 * #body
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 * #...
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 * #...
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 * #...
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 * etc.
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 */
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#include <u.h>
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#include <libc.h>
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#include <bio.h>
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#include <String.h>
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#include <thread.h>
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#include "wiki.h"
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static char*
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Brdwline(void *vb, int sep)
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{
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	Biobufhdr *b;
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	char *p;
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	b = vb;
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	if(Bgetc(b) == '#'){
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		if(p = Brdline(b, sep))
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			p[Blinelen(b)-1] = '\0';
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		return p;
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	}else{
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		Bungetc(b);
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		return nil;
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	}
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}
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Whist*
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Brdwhist(Biobuf *b)
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{
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	int i, current, conflict, c, n;
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	char *author, *comment, *p, *title;
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	ulong t;
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	Wdoc *w;
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	Whist *h;
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	if((p = Brdline(b, '\n')) == nil){
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		werrstr("short read: %r");
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		return nil;
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	}
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	p[Blinelen(b)-1] = '\0';
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	p = strcondense(p, 1);
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	title = estrdup(p);
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	w = nil;
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	n = 0;
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	t = -1;
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	author = nil;
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	comment = nil;
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	conflict = 0;
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	current = 0;
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	while((c = Bgetc(b)) != Beof){
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		if(c != '#'){
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			p = Brdline(b, '\n');
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			if(p == nil)
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				break;
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			p[Blinelen(b)-1] = '\0';
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			switch(c){
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			case 'D':
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				t = strtoul(p, 0, 10);
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				break;
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			case 'A':
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				free(author);
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				author = estrdup(p);
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				break;
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			case 'C':
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				free(comment);
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				comment = estrdup(p);
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				break;
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			case 'X':
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				conflict = 1;
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			}
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		} else {	/* c=='#' */
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			Bungetc(b);
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			if(n%8 == 0)
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				w = erealloc(w, (n+8)*sizeof(w[0]));
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			w[n].time = t;
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			w[n].author = author;
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			w[n].comment = comment;
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			comment = nil;
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			author = nil;
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			w[n].wtxt = Brdpage(Brdwline, b);
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			w[n].conflict = conflict;
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			if(w[n].wtxt == nil)
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				goto Error;
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			if(!conflict)
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				current = n;
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			n++;
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			conflict = 0;
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			t = -1;
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		}
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	}
104 
	if(w==nil)
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		goto Error;
106 
 
107 
	free(comment);
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	free(author);
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	h = emalloc(sizeof *h);
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	h->title = title;
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	h->doc = w;
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	h->ndoc = n;
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	h->current = current;
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	incref(h);
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	setmalloctag(h, getcallerpc(&b));
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	return h;
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118 
Error:
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	free(title);
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	free(author);
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	free(comment);
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	for(i=0; i<n; i++){
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		free(w[i].author);
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		free(w[i].comment);
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		freepage(w[i].wtxt);
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	}
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	free(w);
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	return nil;
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}
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