Notes/public/javascripts/note_tree.js

"use strict";

const noteTree = (function() {
    const noteDetailEl = $('#note-detail');
    const treeEl = $("#tree");
    let startNoteId = null;
    let treeLoadTime = null;
    let clipboardNoteId = null;

    function getTreeLoadTime() {
        return treeLoadTime;
    }

    function getClipboardNoteId() {
        return clipboardNoteId;
    }

    function setClipboardNoteId(cbNoteId) {
        clipboardNoteId = cbNoteId;
    }

    function prepareNoteTree(notes) {
        for (const note of notes) {
            glob.allNoteIds.push(note.note_id);

            note.title = note.note_title;

            if (note.is_protected) {
                note.extraClasses = "protected";
            }
            else {
                if (note.is_clone) {
                    note.title += " (clone)";
                }
            }

            note.key = note.note_id;
            note.expanded = note.is_expanded;

            if (note.children && note.children.length > 0) {
                prepareNoteTree(note.children);
            }
        }
    }

    function setExpandedToServer(note_id, is_expanded) {
        const expandedNum = is_expanded ? 1 : 0;

        $.ajax({
            url: baseApiUrl + 'notes/' + note_id + '/expanded/' + expandedNum,
            type: 'PUT',
            contentType: "application/json",
            success: result => {}
        });
    }

    function initFancyTree(notes) {
        const keybindings = {
            "insert": node => {
                const parentKey = treeUtils.getParentKey(node);
                const encryption = treeUtils.getParentEncryption(node);

                noteEditor.createNote(node, parentKey, 'after', encryption);
            },
            "ctrl+insert": node => {
                noteEditor.createNote(node, node.key, 'into', node.data.is_protected);
            },
            "del": node => {
                treeChanges.deleteNode(node);
            },
            "shift+up": node => {
                const beforeNode = node.getPrevSibling();

                if (beforeNode !== null) {
                    treeChanges.moveBeforeNode(node, beforeNode);
                }
            },
            "shift+down": node => {
                let afterNode = node.getNextSibling();
                if (afterNode !== null) {
                    treeChanges.moveAfterNode(node, afterNode);
                }
            },
            "shift+left": node => {
                treeChanges.moveNodeUp(node);
            },
            "shift+right": node => {
                let toNode = node.getPrevSibling();

                if (toNode !== null) {
                    treeChanges.moveToNode(node, toNode);
                }
            },
            "return": node => {
                // doesn't work :-/
                noteDetailEl.summernote('focus');
            }
        };

        treeEl.fancytree({
            autoScroll: true,
            extensions: ["hotkeys", "filter", "dnd"],
            source: notes,
            scrollParent: $("#tree"),
            activate: (event, data) => {
                const node = data.node.data;

                noteEditor.switchToNote(node.note_id);
            },
            expand: (event, data) => {
                setExpandedToServer(data.node.key, true);
            },
            collapse: (event, data) => {
                setExpandedToServer(data.node.key, false);
            },
            init: (event, data) => {
                if (startNoteId) {
                    data.tree.activateKey(startNoteId);
                }
            },
            hotkeys: {
                keydown: keybindings
            },
            filter: {
                autoApply: true,   // Re-apply last filter if lazy data is loaded
                autoExpand: true, // Expand all branches that contain matches while filtered
                counter: false,     // Show a badge with number of matching child nodes near parent icons
                fuzzy: false,      // Match single characters in order, e.g. 'fb' will match 'FooBar'
                hideExpandedCounter: true,  // Hide counter badge if parent is expanded
                hideExpanders: false,       // Hide expanders if all child nodes are hidden by filter
                highlight: true,   // Highlight matches by wrapping inside <mark> tags
                leavesOnly: false, // Match end nodes only
                nodata: true,      // Display a 'no data' status node if result is empty
                mode: "hide"       // Grayout unmatched nodes (pass "hide" to remove unmatched node instead)
            },
            dnd: dragAndDropSetup,
            keydown: (event, data) => {
                const node = data.node;
                // Eat keyboard events, when a menu is open
                if ($(".contextMenu:visible").length > 0)
                    return false;

                switch (event.which) {
                    // Open context menu on [Space] key (simulate right click)
                    case 32: // [Space]
                        $(node.span).trigger("mousedown", {
                            preventDefault: true,
                            button: 2
                        })
                            .trigger("mouseup", {
                                preventDefault: true,
                                pageX: node.span.offsetLeft,
                                pageY: node.span.offsetTop,
                                button: 2
                            });
                        return false;

                    // Handle Ctrl-C, -X and -V
                    // case 67:
                    //     if (event.ctrlKey) { // Ctrl-C
                    //         copyPaste("copy", node);
                    //         return false;
                    //     }
                    //     break;
                    case 86:
                        console.log("CTRL-V");

                        if (event.ctrlKey) { // Ctrl-V
                            contextMenu.pasteAfter(node);
                            return false;
                        }
                        break;
                    case 88:
                        console.log("CTRL-X");

                        if (event.ctrlKey) { // Ctrl-X
                            contextMenu.cut(node);
                            return false;
                        }
                        break;
                }
            }
        });

        treeEl.contextmenu(contextMenu.contextMenuSettings);
    }

    async function reload() {
        const treeResp = await loadTree();

        // this will also reload the note content
        await treeEl.fancytree('getTree').reload(treeResp.notes);
    }

    function loadTree() {
        return $.get(baseApiUrl + 'tree').then(resp => {
            const notes = resp.notes;
            startNoteId = resp.start_note_id;
            treeLoadTime = resp.tree_load_time;

            if (document.location.hash) {
                startNoteId = document.location.hash.substr(1); // strip initial #
            }

            prepareNoteTree(notes);

            return {
                notes: notes,
                startNoteId: startNoteId
            };
        });
    }

    $(() => loadTree().then(resp => initFancyTree(resp.notes)));

    function collapseTree() {
        treeEl.fancytree("getRootNode").visit(node => {
            node.setExpanded(false);
        });
    }

    $(document).bind('keydown', 'alt+c', collapseTree);

    function scrollToCurrentNote() {
        const node = treeUtils.getNodeByKey(noteEditor.getCurrentNoteId());

        if (node) {
            node.makeVisible({scrollIntoView: true});

            node.setFocus();
        }
    }

    function showSearch() {
        $("#search-box").show();

        $("input[name=search]").focus();
    }

    function toggleSearch() {
        if ($("#search-box:hidden").length) {
            showSearch();
        }
        else {
            resetSearch();

            $("#search-box").hide();
        }
    }

    function resetSearch() {
        $("input[name=search]").val("");

        const tree = treeEl.fancytree("getTree");
        tree.clearFilter();
    }

    $("button#reset-search-button").click(resetSearch);

    $("input[name=search]").keyup(e => {
        const searchString = $("input[name=search]").val();

        if (e && e.which === $.ui.keyCode.ESCAPE || $.trim(searchString) === "") {
            $("button#reset-search-button").click();
            return;
        }

        if (e && e.which === $.ui.keyCode.ENTER) {
            $.get(baseApiUrl + 'notes?search=' + searchString).then(resp => {
                console.log("search: ", resp);

                // Pass a string to perform case insensitive matching
                const tree = treeEl.fancytree("getTree");
                tree.filterBranches(node => {
                    return resp.includes(node.data.note_id);
                });
            });
        }
    }).focus();

    $(document).bind('keydown', 'alt+s', showSearch);

    return {
        getTreeLoadTime,
        getClipboardNoteId,
        setClipboardNoteId,
        reload,
        collapseTree,
        scrollToCurrentNote,
        toggleSearch,
    };
})();