Build a summary of tasks completed today

OmniFocusDailyLog.js

//
//  Build a summary of OmniFocus tasks completed today.
//
//  This is intended to be run as a TextExpander macro,
//  but will work anywhere you can invoke a JS script.
//
//  v 1.0.2 (full release history at bottom)

var NoProjectMarker = "No Project";

getTaskSummary();

function getTaskSummary() {
	var doc = Application('OmniFocus').defaultDocument;

	var thisMorning = startOfDay();

	var tasks = doc.flattenedTasks.whose({completionDate: {'>=':thisMorning} })();
	if (tasks.length == 0) {
		return "No tasks completed. Do something without writing it down?";
	}
	
	// Group tasks by project, then extract progressed projects (projects with
	// completed tasks) from allProjects. This gives us the list of projects
	// in the same order as OmniFocus’s UI.
	var groupedTasks = groupArrayByKey(tasks, function(v) {
		var proj = v.containingProject();
		if (proj) {
			return proj.id();
		}
		return NoProjectMarker;
	});

	var allProjects = doc.flattenedProjects();
	var progressedProjects = allProjects.filter(function(p) {
		return p.id() in groupedTasks;
	});
	
	// Build the summary
	var summary = progressedProjects.reduce(function(s,p){
		return s + summaryForProject(p);
	}, "");
	
	var tasksWithNoProject = groupedTasks[NoProjectMarker];
	if (tasksWithNoProject) {
		summary += summaryForTasksWithTitle(tasksWithNoProject, "No Project\n");
	}
	
	return summary;

	// This needs to be in this scope because it captures groupedTasks
	function summaryForProject(p) {
		var projectID = p.id();
		var tasks = groupedTasks[projectID].filter(function(t) {
			return projectID != t.id(); // Don't include the project itself
		});
		return summaryForTasksWithTitle(tasks, projectSummaryLine(p));
	}
	function summaryForTasksWithTitle(tasks, title) {
		return title + tasks.reduce(summaryForTasks,"") + "\n";
	}
}

// Reducing function to summarize a list of tasks
function summaryForTasks(s,t) {
	return s + lineForTask(t);
}

// Create a summary line for a project
function projectSummaryLine(project) {
	var tokens = [];
	tokens.push(project.name());
	
	var remainingStatus = remainingStatusForProject(project);
	if (remainingStatus != "") {
		tokens.push("(" + remainingStatus + ")");
	}
	
	return tokens.join(" ") + "\n";
}

// This is appended to the end of a project line
function remainingStatusForProject(project) {
	if (!project.completedByChildren()) {
		return "";
	}
	var remainingCount = project.numberOfTasks() - project.numberOfCompletedTasks();
	if (remainingCount == 0) {
		return "complete";
	}
	
	return remainingCount + " remaining";
}

function lineForTask(task) {
	return " ✓ " + task.name() + "\n";
}

// Group an array of items by the key returned by this function
function groupArrayByKey(array,keyForValue) {
	var dict = {};
	for (var i = 0; i < array.length; i++) {
		var value = array[i];
		var key = keyForValue(value);
		if (!(key in dict)) {
			dict[key] = [];
		}
		dict[key].push(value);
	}
	return dict;
}

function startOfDay() {
// The day started at midnight this morning
	var d = new Date();
	d.setHours(0);
	d.setMinutes(0);
	d.setSeconds(0);
	return d;
}

// Release History
// 1.0   Initial release
// 1.0.1 Fix for tasks without a project
// 1.0.2 Relaxed the type checking (!== is too strict)

Fantastic! Thanks for this.