README.md

React Project Management Web App 🖊

This project focus on:

• Build, Style, Configure & Re-use Components.
• Manage State.
• Access DOM Elements & Browser APIs with Refs.
• Manage JSX Rendering Positions with Portals.

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📋 Work flow for building project managment app:

• Read the instructions next to the code.

1. Create component folder.

2. Add ProjectSidebar component

   • Inside create <aside> element.
   • Styling the Sidebar & Button with Tailwind CSS.

3. Add NewProject component for gathering all project data.

   • Creating 3 <input> elements for Title, Description, and Due Date.

4. Because they look the same, Add reusable Input component.

   • Inside adding <label>, <textarea>, and {...props}.
   • After that adding tailwind classes.

5. Add <ProjectSidebar/> and <NewProject/> to App.jsx.

• By hover over tailwind classes, I can see the styles that are applied to the elements.

For now the app looks like this:

6. Split components: Creating a new component: NoProjectSelected to display when no project is selected.

• First, Create <img>, <h2>, <p>, and <button> elements.
• Then, add the styling for each. Looks like this:

7. Create a Button.jsx component to use in multiple places, to avoid repeating the same code.

• The content should be flexible and passed as children. Button should collect all other ...props that might be set, and then spread them on the button element. So later we can add for example the onChange prop.

8. Inside App: Add NoProjectSelected, but render NewProject, or NoProjectSelected, depending if the button got clicked or not. Therefore, add state to manage this situation.

• New state is an object include: property; to indicate if project is new or not existence, and array; for all the projects.
• Then render the corresponding component conditionally.

9. Add and pass handleStartAddProject function to onStartAddProject prop with <NoProjectSelected>, and <ProjectsSidebar> component (that contain button for adding new project).

• Inside each component (NoProjectSelected, and ProjectsSidebar), accept and destructure the prop onStartAddProject from App (that connect to handleStartAddProject function).
• Then add onStartAddProject prop, to onCilck prop in Button.

10. Next step is to collect the user input and validate them.

    • We can do it with onChange prop inside . But here i want to only read the values when i click save button. I don't want to manage all those extra states.
    • Instead i use Ref. To connect them to HTML elements and then interact with those elements. (retrieve the value from an input).

11. Validate user input & showing error Modal via useImperativeHandle;

• Valaidate input fields, and Show the error modal in <NewProject>.
• Create Modal component, and return built in <dialog>.
• Wrap it in forwardRef, extract the children and buttonCaption properties.
• children (from props object), makes this component flexible. children is pass to every component, so I can use Modal as a wrapper to any content I want. And that content will be wrapped by the dialog element.
• Add a ref.
• Add useImperativeHandle, defining open function. To expose a function that can be called from outside the component.
• Inside, pass it a ref object and a function that returns an object.
• Inside open, I want to call showModal method on the dialog element. I do it with useRef named dialog.

12. Styling Modal via tailwind - add styles to dialog, and form, and use the Button component.

• Text style is changed in NewProject.jsx.

13. Add Cancel option to New Project screen;
    • When clicking cancel button, the user will go back to home screen.
    • Inside App: Add handleCancelAddProject function for cancel the creation of new project. (Same code as handleStartAddProject function, but selectedProjectId is set to undefined instaed of null).

• Render <NewProject> with onCancel={handleCancelAddProject}.
• Inside NewProject.jsx - accept onCancel prop.
• Make sure onCancel connected to cancel button.

14. Making projects selectebale & viewing project details:
    • Create SelectedProject component, return <header>, <h1>, and <button> to delete this project, in one <div>.
    • Expect to get project prop, and in the rendered code output {project.title}, formated {project.dueDate}, and {project.description}.
    • Add style via tailwind.
    • I must sure that project can be selected in the sidebar, for that i must make sure that the button change some state in App,jsx.
    • I add another function in App: handleSelectProject, with project id as a value, and update the state of selectedProjectId with the id.
    • This handleSelectProject pass to in the rendered code, with a new onSelectProject prop.
    • Now, inside ProjectsSidebar i should extract selectedProjectId from the incoming props, and connect it to the button in this component, with onClick prop with onSelectProject as a value.
    • In addition, I also want to highlight the button of the project that was selected so I will extract also selectedProjectId, so I will use this prop that contain the id of the project that was selected.
    • I will add return statement inside map, that I can conveniently add more code in the function that pass to map, depending if the element should be highlighted or not.
    • Create a variable to store css classes, check if the project.id I currently outputting is equal to the selectedProjectId I get as a prop. Now i use {cssClasses} as a value for {className} prop.
    • Last step, is to add the newly added selectedProject componenet and output it in the App component, if a project was selected;
    • I declare content variable to be equal to <SelectedProject project={selectedProject} />, now I need to derive the selected project from the state;
    • I find it with const selectedProject = projectsState.projects.find((project) => project.id === projectsState.selectedProjectId);.
    • Now, if i click on a project in side bar, the app failed. The reason is inside App.
    • Project Details: For now i just passing onSelectProject function to onSelectProject prop, but in ProjectsSidebar.jsx I use onSelectProject prop that contain the function mention above, and I just pass this ahead to the button. And the button don't give the id of the selected project. Therefore, more control of how it will be executed is needed;
    • By wrapping this with a function, and manually calling it inside of this function so I can pass the id of the project that currently being rendered as a value to onSelectProject, and therfore as a value to handleSelectProject function.

// So this:
onClick={onSelectProject}

// Become this:
onClick={() => onSelectProject(project.id)}

15. Handling Project Deletion:

    • As before, I need to add a functn to App.jsx, a function which update the state, and remove the project from the array, and I need to pass that function to SelectedProject component.
    • Add handleDeleteProject function, that update the state as the other function. Then filter out the selected project from the projects array.
    • Pass a pointer to handleDeleteProject function with onDelete prop. So I can call this function through the onDelete prop from inside SelectedProject component.
    • Inside SelectedProject I extract this newly added onDelete prop, and than connect it to the delete button, like this: onClick={onDelete}.

16. Adding "Project Tasks" & A Tasks Component:

    • Add new Task component with h2, NEW TASK placeholder (which will be replaced by input and button), p, ul, and styling.
    • Then i use <Tasks /> inside SelctedProject component.
    • Now i replace NEW TASK placeholder with actual input, and a button.
    • Add NewTask component. Including input, button, and styling including flex-box since I want the 2 elements next to each other.

17. Managing Tasks & Understanding Prop Drilling;

    • Now I want to make sure that the added task will be shown. I can do it with a ref, but i will use state ([enteredTask, setEnteredTask]), inside NewTask.
    • Add handleChange function that connect to the input field to update the entered task. This function get an event object as a parameter, that have target which is the input field, and value which is the value of the input field. (event.target.value).
    • Then I add onChange prop to connect it to the handleChange function. (<input onChange={handleChange} />).
    • To complete the two way binding, using value={enteredTask}, by feeding the entered task text into the input field. (<input value={enteredTask} />).
    • Now I want to make sure that when pressing the Add Task button the entered task is added to a place it can be stored.
    • It will be in App, as I already store there all the projects.
    • So inside App I add tasks: [], to the projectsState object.
    • Therefore I will add 2 new function for handling tasks: handleAddTask(), and handleDeleteTask().
    • Inside NewTask I add handleClick() function, as long as onClick={handleClick}.
    • Inside handleClick(), I want to forward the entered value to the app component (onAdd(enteredTask);), and then I want to reset it back to an empty string (setEnteredTask('');).
    • Now i need to get the entered task to the app component.
    • I need to pass handleAddTask() to NewTask component. And NewTask is in Task component, and Task component is inside SelectedProject component. It's invovled prop drilling.
      • So let's start: In App, add handleAddTask as a value to SelectedProject, in onAddTask prop. The same for handleDeleteTask.
      • I will use this function in Task, that called from SelectedProject, that's why I write it there.
      • On SelectedProject extract onAddTask, and onDeleteTask, in order to forward them inside to Task.
      • In Task also destructing onAddTask, and onDeleteTask props that just being added.
      • Then onAddTask will be forward to <NewTask />, and onDeleteTask will be use inside the current component.
      • Inside NewTask destrcuturing the onAdd function from the props object.
      • Inside handleClick in NewTask, forward the entered task to the onAdd function. (That will go to Task, which in the end is in SelectedProject, which than is in App)ץ
      • Few more steps with tasks...

18. Clearing Tasks & Fixing Minor Bugs:
    • Now i want to make sure that clear button on each task will perform his purpose. Add handleDeleteTask in App.
    • Add handleDeleteTask function to onDeleteTask prop, as value to <SelectedProject />.
    • Inside Tasks destruct onDelete prop, in order to connect it to delete button.
    • On button add onClick={onDelete}, but wrap it in a function for full control of execution like this: onClick={() => onDelete(task.id)}.

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