application/davcontroller.c

/*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
*
* Copyright 2024 Olaf Wintermann. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
*   1. Redistributions of source code must retain the above copyright
*      notice, this list of conditions and the following disclaimer.
*
*   2. Redistributions in binary form must reproduce the above copyright
*      notice, this list of conditions and the following disclaimer in the
*      documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/

#include "davcontroller.h"
#include "window.h"

#include <cx/printf.h>

#include "config.h"

#include <libidav/config.h>
#include <libidav/utils.h>

DavBrowser* davbrowser_create(UiObject *toplevel) {
    DavBrowser *doc = ui_document_new(sizeof(DavBrowser));
    UiContext *ctx = ui_document_context(doc);
    doc->ctx = ctx;

    doc->navigation_stack = cxLinkedListCreateSimple(CX_STORE_POINTERS);
    doc->navstack_enabled = true;
    doc->navstack_pos = 0;

    doc->dav_queue = ui_threadpool_create(1);

    doc->path = ui_string_new(ctx, "path");
    doc->resources = ui_list_new(ctx, "reslist");

    return doc;
}


void davbrowser_set_collection(UiObject *ui, DavBrowser *browser, DavResource *collection) {
    if (browser->current) {
        dav_resource_free_all(browser->current);
    }
    ui_list_clear(browser->resources);

    browser->current = collection;
    for (DavResource *res = collection->children; res; res = res->next) {
        ui_list_append(browser->resources, res);
    }

    browser->resources->update(browser->resources, 0);
}

// ------------------------------ davbrowser_connect2repo ------------------------------

void davbrowser_connect2repo(UiObject *ui, DavBrowser *browser, DavCfgRepository *repo, const char *path) {
    DavSession *sn = dav_session_new(application_dav_context(), repo->url.value.ptr);
    if (repo->user.value.ptr && repo->password.value.ptr) {
        cxmutstr decodedpw = dav_repository_get_decodedpassword(repo);
        dav_session_set_auth(sn, repo->user.value.ptr, decodedpw.ptr);
        free(decodedpw.ptr);
    }
    browser->sn = sn;
    if (repo->name.value.length > 0) {
        browser->repo_base = cx_strdup(cx_strn(repo->name.value.ptr, repo->name.value.length)).ptr;
    } else {
        browser->repo_base = cx_strdup(cx_strn(repo->url.value.ptr, repo->url.value.length)).ptr;
    }

    char *dav_path = util_concat_path(browser->repo_base, path);
    ui_set(browser->path, dav_path);
    free(dav_path);

    davbrowser_query_path(ui, browser, path);
}


// ------------------------------ davbrowser_query_path ------------------------------

typedef struct DavBrowserQueryPath {
    UiThreadpool *pool;
    DavBrowser *browser;
    char *path;
    DavResource *result;
} DavBrowserQueryPath;

static int browser_query_path(void *data) {
    DavBrowserQueryPath *query = data;
    DavSession *sn = query->browser->sn;

    DavResource *res = dav_query(sn, "select `idav:crypto-name`,`idav:crypto-key`,D:lockdiscovery from %s with depth = 1 order by iscollection desc, name", query->path);
    query->result = res;

    return 0;
}

static void browser_query_finished(UiEvent *event, void *data) {
    DavBrowserQueryPath *query = data;
    DavBrowser *browser = event->document;

    if (query->pool == browser->dav_queue) {
        if (query->result) {
            davbrowser_set_collection(event->obj, browser, query->result);
        } else {
            // TODO: error
        }

        window_progress(event->window, 0);
    } else {
        // operation aborted
        if (query->result) {
            dav_resource_free_all(query->result);
        }
    }

    free(query->path);
    free(query);
}

void davbrowser_query_path(UiObject *ui, DavBrowser *browser, const char *path) {
    if (!browser->sn) {
        // TODO: error
        return;
    }

    // for comparison, we need the current base_url/repo_name + path
    size_t len = path ? strlen(path) : 0;
    if (len == 1 && *path == '/') {
        path = "";
    }
    
    // check if the new path is a prefix of the current path
    // if not, we have to set the pathbar string to the new path
    char *full_path = util_concat_path(browser->repo_base, path);
    char *full_path_col = util_concat_path(full_path, "/");
    char *current_path = ui_get(browser->path);
    cxstring cpath = cx_str(current_path);
    cxstring newc = cx_str(full_path_col);
    if (!cx_strprefix(cpath, newc)) {
        ui_set(browser->path, full_path);
    }
    free(full_path);
    free(full_path_col);

    DavBrowserQueryPath *query = malloc(sizeof(DavBrowserQueryPath));
    query->pool = browser->dav_queue;
    query->browser = browser;
    query->path = strdup(path);
    query->result = NULL;
    ui_threadpool_job(browser->dav_queue, ui, browser_query_path, query, browser_query_finished, query);

    window_progress(ui->window, 1);

    davbrowser_add2navstack(browser, browser->repo_base, path);
}

void davbrowser_query_url(UiObject *ui, DavBrowser *browser, const char *url) {
    if (browser->repo_base) {
        cxstring base = cx_str(browser->repo_base);
        cxstring newurl = cx_str(url);

        if (cx_strprefix(newurl, base)) {
            const char *path = url + base.length;
            davbrowser_query_path(ui, browser, path);
            return;
        }
    }

    char *path = NULL;
    DavCfgRepository *repo = dav_config_url2repo(get_config(), url, &path);
    davbrowser_connect2repo(ui, browser, repo, path);

    if (path) {
        free(path);
    }
    if (!repo->node) {
        dav_repository_free(get_config(), repo);
    }
}

void davbrowser_add2navstack(DavBrowser *browser, const char *base, const char *path) {
    if (browser->navstack_enabled) {
        for (int i = 0; i < browser->navstack_pos; i++) {
            char *nav_url = cxListAt(browser->navigation_stack, 0);
            cxListRemove(browser->navigation_stack, 0);
            free(nav_url);
        }
        browser->navstack_pos = 0;

        char *nav_url = util_concat_path(base, path);
        cxListInsert(browser->navigation_stack, 0, nav_url);

        if (browser->navigation_stack->size > DAVBROWSER_MAX_NAVLIST) {
            char *nav = cxListAt(browser->navigation_stack, browser->navigation_stack->size - 1);
            free(nav);
            cxListRemove(browser->navigation_stack, browser->navigation_stack->size - 1);
        }
    }
}

void davbrowser_navigation_back(UiObject *ui, DavBrowser *browser) {
    if (browser->navstack_pos+1 < browser->navigation_stack->size) {
        browser->navstack_pos++;
        char *nav_url = cxListAt(browser->navigation_stack, browser->navstack_pos);
        browser->navstack_enabled = false;
        davbrowser_query_url(ui, browser, nav_url);
        browser->navstack_enabled = true;
    }
}

void davbrowser_navigation_forward(UiObject *ui, DavBrowser *browser) {
    if (browser->navstack_pos > 0) {
        browser->navstack_pos--;
        char *nav_url = cxListAt(browser->navigation_stack, browser->navstack_pos);
        browser->navstack_enabled = false;
        davbrowser_query_url(ui, browser, nav_url);
        browser->navstack_enabled = true;
    }
}