{"name":"REtW 3 [Brownsville]","description":"It is time...forJavaScript.","photo":"https://res.cloudinary.com/dzv7hjwfn/image/upload/lhyjpblq7c9a7cjdx5gc","view_count":41,"fork_count":19,"expires_at":null,"created_at":"2024-11-11T15:20:56.349892Z","updated_at":"2024-11-11T15:20:56.349893Z","user_id":60,"status":"PUBLIC","parent_id":1345,"id":3543,"user":{"photo":null,"email":"jacob@jippity.pro","recess_id":"34481dd2-2bdf-14f9-99da-131de59dc90f","created_at":"2024-02-26T18:31:54.473216Z","reset_token":null,"stripe_customer_id":"cus_RPbovGjLueUufv","seats":100,"username":"2718281828459045","id":60,"password_hash":"$2b$12$ZpelZmCi5wEA/VuXSdOJXeylQ6vOUks0sfwQxIKdjwBAeamaWIMOW","updated_at":"2024-02-26T18:31:54.473218Z","reset_token_expiry":null,"subscription_status":"active"},"code":{"script.js":"/*\nNow that we've tinkered with HTML and CSS, the bones and clothes of the Web, it's time to meet JavaScript — the brain.\n\nJavaScript is a powerful and flexible programming language that doesn't *need* to be online but is commonly the main language of websites, Web apps, and the online elements they contain.\n\nJavaScript is easier to read and write than HTML and has all the powerful features of a modern programming language: variables, functions, arrays, loops, and much more.\n\nWe are not going to start from scratch today. If you want or need a beginner-friendly introduction to programming concepts in JavaScript (on Jippity), check out my YouTube playlist recorded for that purpose:\nhttps://youtube.com/playlist?list=PLxxxPD9caN2RkhVFrjrDOnhsEubUTWjGC&si=7YWsfCfbPXtroLeq\n\nWe will proceed assuming you know the basics. I will still drop some reminders and you can always ask questions too! No question is too basic to ask.\n\nOur main focus today will be writing JavaScript code that powers up our HTML elements.\nWe made buttons, sliders, and menus last time. Let's have them actually do stuff now!\nA natural test playground is image manipulation. Let's upload and morph an image.\n*/\n\n//We create a constant (non-changing) variable in JS called imageUpload\n//that refers to the HTML element called 'imageUpload'\nconst imageUpload = document.getElementById('imageUpload');\n/*\nWe are going to call the method .addEventListener all the time.\nThe first argument, 'change', tells JS to do something whenever imageUpload changes — i.e. when someone clicks that button.\nThe second argument, handleImageUpload, is what we do when that change happens.\nhandleImageUpload is a *function* (basically a verb in JS) that we write below.\n*/\nimageUpload.addEventListener('change', handleImageUpload);\n\n//We create two more variables with 'let'. 'let' means we can change them later.\n//imageArray will be an array (a list) of images.\n//For now, it just has one default image which comes with this project.\n// Initially store the default image as an object with url and name\nlet imageArray = [{ url: \"@asset('jacobHead')\", name: \"Default Image\" }];\n//We refer to elements in an array with their *index*, which just means \"counter\".\n//Indices start at 0. The first image in our array has the index 0.\nlet currentImageIndex = 0;\n\n/*\nFunctions are actions that we program in JS.\nThe word 'function' lets you know that we're writing a function, then the next word is its name.\nThis function, handleImageUpload, takes in an event (whatever that is — we'll see!) and then does everything between { and }.\n*/\nfunction handleImageUpload(event) {\n //if the length of our array (the number of things on the list) is 5 or more,\n if (imageArray.length >= 5) {\n //*alert* ths user (like a pop-up) that they reached the max.\n alert(\"Maximum of 5 images reached.\");\n //then leave the function without doing anything else.\n return;\n }\n //On the other hand, if there is still space in the array, do all this.\n //This saves the first file the user uploads (we're expecting a picture).\n const file = event.target.files[0];\n //FileReader is a *class* that, well, reads files. It's built-in for us.\n const reader = new FileReader();\n //our FileReader will do this now:\n reader.onload = function (e) {\n //'push' means 'put this thing at the end of the list.\n imageArray.push({ url: e.target.result, name: file.name });\n //Update the index so the right option will appear in the menu\n currentImageIndex = imageArray.length - 1;\n //Then we call this function (written below) to update the menu.\n updateImageDropdown();\n //Then we call another function (written below as well) that loads the image.\n loadImageFromArray(imageArray.length - 1); //Why the minus one?\n //Lastly, reset all sliders.\n handleReset();\n }\n //We convert the file to a URL so that we can display it. HTML likes images as URLs.\n reader.readAsDataURL(file);\n\n}\n\n/*\nThis function assists the one above. \nRather than plop all this code into the earlier function, we pop it out into its own thing.\nThis is good practice. One function should complete one task and deal with one kind of data.\nThis function is about dropdown menus, while the earlier one is about loading images;\nDifferent tasks, different functions.\n*/\n\nfunction updateImageDropdown() {\n //Like before, we fetch an HTML element with document.getElementById\n const dropdown = document.getElementById('imageSelectDropdown');\n //Clear the existing options\n dropdown.innerHTML = '';\n //array.forEach *loops* code, one time for each element of the array.\n //index will change on each loop: 0, 1, 2, 3, 4.\n //We don't actually use imageSrc but that would also change to be the image data itself for each individual image.\n imageArray.forEach((imageSrc, index) => {\n //We create an option to put onto the menu\n const option = document.createElement('option');\n //We link it to the index to keep track of which is which\n option.value = index;\n //Set the text of the option using a helper function\n option.textContent = shortenFileName(imageSrc.name);\n //.appendChild says \"put this thing on that thing.\" The parent is the menu; the child is the individual option.\n dropdown.appendChild(option);\n });\n //Set dropdown selection to current image\n dropdown.value = currentImageIndex;\n\n}\n\n//Another function for another task: loading an image once it's been stored in our array.\nfunction loadImageFromArray(index) {\n //imageArray[index] points to the image with that index. imageArray[3] is the fourth image, for example. Remember we start counting at 0!\n const imageObj = imageArray[index];\n //Image is also built into JS to help us handle images. We save it under the name 'img'\n const img = new Image();\n //When the image is loaded, do something...\n img.onload = function () {//... that something is this.\n //save the imageCanvas under the name 'canvas'\n const canvas = document.getElementById('imageCanvas');\n //Probe some of its properties\n const ctx = canvas.getContext('2d');\n canvas.width = img.width;\n canvas.height = img.height;\n //The important line: draw the image at coordinates (0,0) with the correct dimensions.\n ctx.drawImage(img, 0, 0, img.width, img.height);\n handleReset(); // Reset sliders whenever a new image is loaded\n //Move the Spin and Flip buttons\n positionButtonsRelativeToCanvas();\n }\n //This line looks a little dumb. But we need it. Try to think through exactly what it's saying.\n img.src = imageObj.url;\n //Set the current image to the one we just loaded, for convenience.\n currentImageIndex = index;\n}\n\n//With all that in place in the background, we can now write a short chunk of code that loads the correct image when we use the dropdown.\n//This should be familiar now.\ndocument.getElementById('imageSelectDropdown').addEventListener('change', function () {\n //This line just makes sure our selection is interpeted as a number (not the *character* \"2\", or something).\n const selectedIndex = parseInt(this.value);\n //Then just use the machinery we built before.\n loadImageFromArray(selectedIndex);\n});\n\n//We also want to be able to delete images.\ndocument.getElementById('deleteImageButton').addEventListener('click', deleteCurrentImage);\n\n//Of course we have to write the function that does that.\nfunction deleteCurrentImage() {\n //Make sure there's at least 2 images so that we don't delete them all.\n if (imageArray.length > 1) {\n //\"splice\" chops off an item from an array. Very useful.\n imageArray.splice(currentImageIndex, 1); //Just delete 1 image.\n //This is a little bit of \"index shuffling\" so the array doesn't have gaps.\n if (currentImageIndex >= imageArray.length) {\n currentImageIndex = imageArray.length - 1;\n }\n //We saw this stuff before.\n loadImageFromArray(currentImageIndex);\n updateImageDropdown();\n } else { //But if you try to delete the 0th image, you get an alert and nothing else happens.\n alert(\"Cannot delete the default image.\");\n }\n}\n\n/*\nOne more thing. An EventListener for 'DOMContentLoaded' runs whenever the HTML file is finished loading.\nThis controls the first thing you see when the site loads.\n(DOM stands for Document-Object-Model. Doesn't matter.)\nThis is useful to set up defaults and load in important elements.\n*/\ndocument.addEventListener('DOMContentLoaded', function () {\n const canvas = document.getElementById('imageCanvas');\n const ctx = canvas.getContext('2d');\n const defaultImg = new Image();\n //This is very similar to what we did in loadImageFromArray(), but it just loads the default image without even checking the array.\n //This will all get overwritten as soon as the user uploads an image or touches the dropdown menu.\n defaultImg.onload = function () {\n canvas.width = defaultImg.width;\n canvas.height = defaultImg.height;\n ctx.drawImage(defaultImg, 0, 0, defaultImg.width, defaultImg.height);\n }\n defaultImg.src = \"@asset('jacobHead')\";\n updateImageDropdown();\n});\n\n/////////////////////////////////////////////////////////////\n/*\nAlright, that was quite a bit of work just to make pictures appear! \nBut that's how it is. We are careful up front to make sure nothing funky or unexpected happens.\n\nWith that out of the way, let's have some fun!\nThe goal is to *transform* an image with code and *control* those transformations with buttons, sliders, etc.\nThat opens a whole can of worms. From a computer's perspective, what is an image?\n(An array of pixels.) (What's a pixel?) \n((An array of colors.)) ((What's a color?))\n(((Oof. Slow down, cowboy.)))\n\nWe are not going to write an entire graphics processing library right now.\nThat's an amazing project to undertake, but not for the faint of heart.\nLuckily, many smart men and women have worked out the computations needed to display and transform graphics.\nSome of that is built into JavaScript and some we will recreate ourselves. \nEither way, you cannot just tell JS \"move this over here and turn it blue.\" You have to be more specific.\n(You can tell Jippity that and it will probably understand you. But it still helps to be as specific as possible.)\nWe are going to communicate with the computer in the universal language: mathematics.\nIn particular, we will use *numbers* and *geometry* to transform images.\n\nLet's dive in.\n*/\n\n\n//First, we make sure our JS is listening to the HTML elements: the sliders.\nconst translationSliderX = document.getElementById('translationSliderX');\nconst translationSliderY = document.getElementById('translationSliderY');\nconst rotationSlider = document.getElementById('rotationSlider');\nconst scaleSlider = document.getElementById('scaleSlider');\n\n//For each slider, call a function whenever the user does something.\ntranslationSliderX.addEventListener('input', handleTranslationX);\ntranslationSliderY.addEventListener('input', handleTranslationY);\nrotationSlider.addEventListener('input', handleRotation);\nscaleSlider.addEventListener('input', handleScale);\n\n//Now the real work: let's write the function that transform the image.\n\n/*\nThe basic idea behind computer graphics is that the screen is a *grid* of pixels.\nMy laptop screen has 5,939,136 pixels. That's a lot!\nEach pixel can be one of about a billion colors.\nThere are different ways to descibe colors to a computer. \nThe most common is RGB (red, green, blue) where each pixel is a mix of three primary colors.\nThe amount of R, G, B ranges from 0 to 255, so that (0, 0, 0) means no color at all (black), and (255, 255, 255) means \"shine the light of each color as bright as you can\" — that makes white.\nYou can, in theory, draw a picture on screen by specificying R, G, B for each individual pixel. \nBut that's a pain in the butt. We are going to zoom out a little from that and rely on code that other people have already written.\nBut underneath at all, don't forget about what's happening! Tiny little colored lights flashing at differing brightnesses. So simple, yet so powerful.\n*/\n\n\n//We set up two translation sliders: one in the horizontal (X) direction, and one in the vertical (Y) direction.\n//Let's initizalize the translation amounts in our first two *transformation variables*.\nlet translateX = 0;\nlet translateY = 0;\n\n//Same for rotation, but we just need one number (how much clockwise rotation)\nlet currentRotation = 0;\n\n//Scale will just be one number as well: a size multiplier\nlet currentScale = 1;\n\n//We'll also save a number that represents if the image is flipped or not. 1: not flipped; -1: flipped.\nlet flipState = 1;\n\n//When you touch a slider, it creates an 'event' and returns a number.\n//You can set the min and max number of a slider, as well as its step size, in HTML.\n\n//In each of the next four functions, we get the number that the slider returns and set our transformation variable to it.\n//Four transformation variables, four functions.\nfunction handleTranslationX(event) {\n translateX = parseInt(event.target.value);\n drawTransformedImage();\n}\n\n//spot the small difference?\nfunction handleTranslationY(event) {\n translateY = parseInt(event.target.value);\n drawTransformedImage();\n}\n\n//This slider is set up to return 0 through 360. Why?\nfunction handleRotation(event) {\n currentRotation = parseInt(event.target.value);\n drawTransformedImage();\n}\n\n//This one ranges from 0.1 to 2.9. Why? What happens if we change that range? \nfunction handleScale(event) {\n currentScale = parseFloat(event.target.value);\n drawTransformedImage();\n}\n\n//Finally, the main transformation function: the business end of our software weapon.\nfunction drawTransformedImage() {\n //A little setup to find the Canvas\n const canvas = document.getElementById('imageCanvas');\n const ctx = canvas.getContext('2d');\n //Prepare a blank Image type\n const img = new Image();\n //Then tell that Image to load in the current image we want\n img.src = imageArray[currentImageIndex].url;\n //Once the image is loaded, do all this:\n img.onload = function () {\n // Clear the canvas to prepare for the new drawing.\n ctx.clearRect(0, 0, canvas.width, canvas.height);\n\n // *Translate* (slide) the the view to the center of the canvas. (How does this work?)\n ctx.translate(canvas.width / 2, canvas.height / 2);\n\n // .scale makes an image bigger or smaller by multiplying its size (like stretching in the X and Y directions).\n //This line is just to handle flipping. flipState can either be -1 or 1, which represent flipping picture in the X direction or not.\n ctx.scale(flipState, 1);\n\n // If the image is flipped, we also flip the translateX slider's value. Why? \n let adjustedTranslateX = flipState === -1 ? -translateX : translateX;\n\n //We use the built-in .rotate method. Easy! We have to do a little math to convert from degrees to *radians*, which is the standard unit of angle rotation in math and physics.\n //(Don't sweat that detail unless you're interested, in which case, ask me.)\n //Why do we multiply by flipState here? What happens if we don't?\n ctx.rotate(flipState * currentRotation * Math.PI / 180);\n\n //Now the actual scaling -- sizing up and down. We have to apply the same number in both X and Y directions. What happens if we don't?\n ctx.scale(currentScale, currentScale);\n\n /* \n We are ready to draw the image. It has been flipped, rotated, and scaled; now we just need to translate it.\n We do this by adding to its X and Y starting coordinates.\n Questions:\n Why do we subtract img.width/2 and img.height/2?\n Why do we add adjustedTranslateX and subtract translateY?\n Depending on your expectations, the combination of translation and rotation may not work the way you expect. Why? Can you fix it if it bugs you?\n Look up the five arguments to the drawImage() method. Describe them to yourself.\n\n We draw the image. */\n ctx.drawImage(img, -img.width / 2 + adjustedTranslateX, -img.height / 2 - translateY, img.width, img.height);\n\n // Lastly, as a bit of housekeeping, we use a shortcut to reset all the transformations back to default.\n //If you are curious about what that actually means, look up the phrase \"reset the transformation matrix to the identity\" and learn about Linear Algebra.\n ctx.setTransform(1, 0, 0, 1, 0, 0);\n }\n}\n\n\n// We want a reset button that sets all transformations back to default too.\nconst resetButton = document.getElementById('resetButton');\nresetButton.addEventListener('click', handleReset);\nfunction handleReset() {\n\n // Check if there's a rotation animation happening (you'll see why later)...\n if (rotationAnimationId !== null) {\n //..and cancel it.\n cancelAnimationFrame(rotationAnimationId);\n rotationAnimationId = null;\n }\n\n // Reset the transformation variables.\n translateX = 0;\n translateY = 0;\n currentRotation = 0;\n currentScale = 1; //Why is the default for scale 1, not 0?\n\n // Reset the slider positions.\n document.getElementById('translationSliderX').value = 0;\n document.getElementById('translationSliderY').value = 0;\n document.getElementById('rotationSlider').value = 0;\n document.getElementById('scaleSlider').value = 1;\n\n // And re-draw the image in its default state.\n drawTransformedImage();\n}\n\n//Here's a 'Flip' button that acts like a mirror by switching flipState to 1 or -1.\ndocument.getElementById('flipButton').addEventListener('click', () => {\n flipState *= -1; //Multiplying by -1 switches positive and negative.\n drawTransformedImage();\n});\n\n// Now let's make a 'Spin' button. A bit more work.\ndocument.getElementById('spinButton').addEventListener('click', imageRotation);\n\n//We're going to store the state of the spinning animation in a variable.\nlet rotationAnimationId = null;\n\nfunction imageRotation() {\n //If the animation is running...\n if (rotationAnimationId !== null) {\n //..stop it.\n cancelAnimationFrame(rotationAnimationId);\n rotationAnimationId = null;\n return;\n }\n\n //We spin the image by rotating it over time.\n const rotateImage = (timestamp, lastTimestamp) => {\n //timestamp is our clock, updating every moment the computer runs.\n //We are going to imagine them as numbers of milliseconds since the page loaded.\n if (!lastTimestamp) lastTimestamp = timestamp;\n //delta is the change in time since the last calculation.\n const delta = timestamp - lastTimestamp;\n //This math adds a 1000th of a rotation for each millisecond that elapses.\n //Look up what the modulus (%) does. Why do we want that?\n currentRotation = (currentRotation + (360 / 1000) * delta) % 360;\n //Talk to the slider...\n document.getElementById('rotationSlider').value = currentRotation;\n //..and redraw the image now that currentRotation is a tiny bit bigger.\n drawTransformedImage();\n //This handles the frames loading in one at a time.\n rotationAnimationId = requestAnimationFrame((newTimestamp) => rotateImage(newTimestamp, timestamp));\n };\n rotationAnimationId = requestAnimationFrame(rotateImage);\n}\n\n\n\n//Helper function to shorten a long file name (housekeeping for the menu)\nfunction shortenFileName(filename) {\n // Check if the filename is long.\n if (filename.length > 15) {\n //What does this line do? Break it down.\n return `${filename.substring(0, 8)}...${filename.substring(filename.length - 4)}`;\n }\n // Return the original filename if it's short enough to begin with.\n return filename;\n}\n\n\n//Helper function to move the buttons to match the middle of the image canvas (which can change sizes)\nfunction positionButtonsRelativeToCanvas() {\n const canvas = document.getElementById('imageCanvas');\n const spinButton = document.getElementById('spinButton');\n const flipButton = document.getElementById('flipButton');\n\n //Built-in method to get the rectangle surrounding something.\n const canvasRect = canvas.getBoundingClientRect();\n\n // Position the spin button 50px to the left of the canvas\n spinButton.style.left = `${canvasRect.left - 50 - spinButton.offsetWidth}px`;\n // Position the flip button 50px to the right of the canvas\n flipButton.style.left = `${canvasRect.right + 50}px`; //Why don't we subtract that third term like for spinButton?\n\n //Calculate where the tops of the buttons should be and set them.\n const buttonsTop = canvasRect.top + (canvasRect.height / 2) - (spinButton.offsetHeight / 2);\n spinButton.style.top = `${buttonsTop}px`;\n flipButton.style.top = `${buttonsTop}px`;\n}\n\n//Helpful other stuff:\n// Call the function to position buttons when the page loads.\nwindow.onload = positionButtonsRelativeToCanvas;\n\n// Call the function when the window is resized in case the canvas position changes.\nwindow.onresize = positionButtonsRelativeToCanvas;\n\n\n/////////////////////////////////////////////////////\n/*\nThis is really just the tip of the iceberg using JavaScript. There's so much you can do — a lifetime's worth to learn.\nTry to imagine something you want to see or do on a webpage. I bet you can make that a reality in JavaScript.\nA couple of bonus questions, extensions, prompts:\n Can you add more buttons or sliders and make them do other things?\n Can you load and display more than one image at a time and position them well?\n Can you design more animations?\n Can you affect the colors of the image?\n If functions like .scale and .rotate were not built-in to JavaScript, how would you design and implement them yourself?\n\n [Jippity can be your partner in exploring any of those questions.]\n\n Happy coding — the world of JavaScript has opened its doors to you!\n*/\n\n\n\n","style.css":"body {\n background-color: lightblue;\n}\n\n/* There's a whole bunch of cosmetic CSS in here. Feel free to study and adjust it on your own.\nNone of it critical to the main functions of the buttons or sliders. Javascript handles function; CSS handles looks. */\n\nlabel {\n color: darkmagenta;\n background-color: pink;\n padding: 5px;\n margin: 5px 0;\n display: inline-block;\n width: calc(100% - 10px);\n box-sizing: border-box;\n border-radius: 5px;\n text-align: center;\n}\n\n#imageCanvas {\n background-color: rgba(255, 255, 255, 0.623);\n border: 2px solid black;\n display: block;\n margin: 20px auto;\n\n}\n\n#slider-container {\n display: grid;\n grid-template-columns: repeat(2, 1fr);\n gap: 10px;\n justify-content: center;\n margin: 20px auto;\n width: fit-content;\n}\n\n#controls-container {\n display: flex;\n flex-direction: column;\n align-items: center;\n gap: 10px;\n margin: 20px auto;\n padding: 10px;\n width: fit-content;\n}\n\n.upload-button {\n display: flex;\n align-items: center;\n justify-content: center;\n height: 50px;\n padding: 0 20px;\n font-size: 16px;\n white-space: nowrap;\n background-color: #007bff;\n color: white;\n border-radius: 5px;\n cursor: pointer;\n text-align: center;\n line-height: 1.5;\n}\n\n.upload-button:hover {\n background-color: #0056b3;\n}\n\n.delete-button {\n display: inline-block;\n padding: 8px 15px;\n background-color: #ff0000;\n color: white;\n border-radius: 5px;\n cursor: pointer;\n font-size: 16px;\n}\n\n.delete-button:hover {\n background-color: #cc0000;\n}\n\n.reset-button {\n display: inline-block;\n padding: 8px 15px;\n background-color: #ffff00;\n color: black;\n border-radius: 5px;\n cursor: pointer;\n font-size: 16px;\n}\n\n.reset-button:hover {\n background-color: #cccc00;\n}\n\n#imageSelectDropdown {\n display: inline-block;\n padding: 6px 10px;\n background-color: #00ff00;\n color: rgb(8, 59, 2);\n border-radius: 5px;\n cursor: pointer;\n font-size: 16px;\n border: none;\n}\n\n#imageSelectDropdown:hover {\n background-color: #009900;\n}\n\n/* Style for the slider track */\ninput[type=range]::-webkit-slider-runnable-track {\n width: 100%;\n height: 8px;\n cursor: pointer;\n background: #f098e8;\n border-radius: 5px;\n}\n\ninput[type=range]::-moz-range-track {\n width: 100%;\n height: 8px;\n cursor: pointer;\n background: #f098e8;\n border-radius: 5px;\n}\n\n/* Adjusting slider thumb for WebKit browsers */\ninput[type=range]::-webkit-slider-thumb {\n -webkit-appearance: none;\n margin-top: -8px;\n width: 25px;\n height: 25px;\n background: pink;\n cursor: pointer;\n border-radius: 1px;\n}\n\n/* Adjusting slider thumb for Firefox */\ninput[type=range]::-moz-range-thumb {\n width: 25px;\n height: 25px;\n background: pink;\n cursor: pointer;\n border-radius: 1px;\n}\n\n.spin-button {\n display: inline-block;\n padding: 8px 15px;\n background-color: #ffa500;\n color: white;\n border-radius: 5px;\n cursor: pointer;\n font-size: 16px;\n position: absolute;\n\n\n}\n\n.flip-button {\n display: inline-block;\n padding: 8px 15px;\n background-color: #ffa500;\n color: white;\n border-radius: 5px;\n cursor: pointer;\n font-size: 16px;\n position: absolute;\n\n}","index.html":"\n\n\n\n \n \n Reverse Engineer the Web Week 3\n \n\n\n\n\n\n \n \n

\n \n Upload an Image\n \n\n \n \n \n \n

\n\n \n

\n\n \n X Translation:\n \n\n Y Translation:\n \n\n Rotation:\n \n\n Scale:\n \n\n

\n \n \n \n\n\n \n \n \n \n \n \n \n\n\n"},"chat_history":[{"deleted":0,"code_id":197496,"input_tokens":null,"id":99227,"project_id":3543,"sender":"human","message":"HTML","created_at":"2024-12-29T05:33:13.447856Z","output_tokens":null},{"deleted":0,"code_id":197496,"input_tokens":8841,"id":99228,"project_id":3543,"sender":"ai","message":"Could you please provide more details about what you would like to do with the HTML? Are you looking to add a new feature or make some changes to the existing HTML?","created_at":"2024-12-29T05:33:13.453608Z","output_tokens":41},{"deleted":0,"code_id":197498,"input_tokens":null,"id":99229,"project_id":3543,"sender":"human","message":"Show me the basics of HTML","created_at":"2024-12-29T05:40:01.984055Z","output_tokens":null},{"deleted":0,"code_id":197498,"input_tokens":8846,"id":99230,"project_id":3543,"sender":"ai","message":"Certainly! HTML, or Hypertext Markup Language, is the standard language for creating web pages. Here's a simple breakdown of its structure:\n\n```html\n\n\n\n \n \n My First Webpage\n\n\n

Welcome to My Webpage

This is a paragraph of text that describes something about the webpage.

\n Visit Example\n $\"A$ \n\n\n```\n\n### Key Components:\n- **``**: Declares the document type and version of HTML.\n- **``**: The root element of an HTML page.\n- **``**: Contains meta-information about the HTML document, such as its title and character set.\n- **``**: Sets the title of the webpage, which appears in the browser tab.\n- **`<body>`**: Contains the content of the page, such as text, images, and links.\n- **`<h1>` to `<h6>`**: Header tags, with `<h1>` being the largest and `<h6>` the smallest.\n- **`<p>`**: Paragraph tag for blocks of text.\n- **`<a>`**: Anchor tag to create hyperlinks.\n- **`<img>`**: Image tag to display pictures on the page.\n\nWould you like to know more about any specific element or how to create something with HTML?","created_at":"2024-12-29T05:40:01.990003Z","output_tokens":337},{"deleted":0,"code_id":197498,"input_tokens":null,"id":99231,"project_id":3543,"sender":"human","message":"teach me about CSS","created_at":"2024-12-29T05:40:21.579496Z","output_tokens":null},{"deleted":0,"code_id":197498,"input_tokens":8845,"id":99232,"project_id":3543,"sender":"ai","message":"Certainly! CSS, or Cascading Style Sheets, is used to style and layout web pages. It allows you to change things like colors, fonts, spacing, and positioning of elements on a webpage. Here's a simple example of how CSS is used:\n\n```html\n<!DOCTYPE html>\n<html lang=\"en\">\n<head>\n <meta charset=\"UTF-8\">\n <meta name=\"viewport\" content=\"width=device-width, initial-scale=1.0\">\n <title>Styled Webpage\n \n\n\n

Welcome to My Styled Webpage

This is some text that will be styled using CSS.

\n\n\n```\n\n```css\n/* styles.css */\nbody {\n background-color: lightblue;\n font-family: Arial, sans-serif;\n}\n\nh1 {\n color: darkblue;\n text-align: center;\n}\n\np {\n color: darkmagenta;\n font-size: 16px;\n padding: 10px;\n}\n```\n\n### Key Concepts:\n- **Selectors**: These are used to select the HTML elements you want to style. In the example, `body`, `h1`, and `p` are selectors.\n- **Properties and Values**: CSS styles are written as property-value pairs inside curly braces `{}`. For example, `color: darkblue;` is a property-value pair.\n- **Cascading**: The \"Cascading\" part of CSS means that styles can cascade down from parent to child elements, and later styles can override earlier ones.\n- **External Stylesheets**: CSS is often written in separate files (like `styles.css`) that are linked to the HTML using the `` tag.\n\nWould you like to know more about any specific CSS feature or how to customize your webpage's style further?","created_at":"2024-12-29T05:40:21.585110Z","output_tokens":385},{"deleted":0,"code_id":197498,"input_tokens":null,"id":99233,"project_id":3543,"sender":"human","message":"Show me how to transform images in JavaScript","created_at":"2024-12-29T05:40:53.744854Z","output_tokens":null},{"deleted":0,"code_id":197498,"input_tokens":8848,"id":99234,"project_id":3543,"sender":"ai","message":"Great! You can transform images using JavaScript by manipulating elements on an HTML canvas. Since you already have a project with image transformations using sliders for translation, rotation, and scaling, let's look at how it's done in your code:\n\n1. **Translation**: Moving the image along the X or Y axis.\n2. **Rotation**: Rotating the image around its center.\n3. **Scaling**: Changing the size of the image.\n\nHere's a breakdown of how these transformations are applied in your existing code:\n\n### Translation\n```javascript\nfunction handleTranslationX(event) {\n translateX = parseInt(event.target.value);\n drawTransformedImage();\n}\n\nfunction handleTranslationY(event) {\n translateY = parseInt(event.target.value);\n drawTransformedImage();\n}\n```\n\n### Rotation\n```javascript\nfunction handleRotation(event) {\n currentRotation = parseInt(event.target.value);\n drawTransformedImage();\n}\n```\n\n### Scaling\n```javascript\nfunction handleScale(event) {\n currentScale = parseFloat(event.target.value);\n drawTransformedImage();\n}\n```\n\n### Applying Transformations\nAll transformations are applied in the `drawTransformedImage` function:\n\n```javascript\nfunction drawTransformedImage() {\n const canvas = document.getElementById('imageCanvas');\n const ctx = canvas.getContext('2d');\n const img = new Image();\n img.src = imageArray[currentImageIndex].url;\n\n img.onload = function () {\n ctx.clearRect(0, 0, canvas.width, canvas.height);\n ctx.translate(canvas.width / 2, canvas.height / 2);\n ctx.scale(flipState, 1);\n let adjustedTranslateX = flipState === -1 ? -translateX : translateX;\n ctx.rotate(flipState * currentRotation * Math.PI / 180);\n ctx.scale(currentScale, currentScale);\n ctx.drawImage(img, -img.width / 2 + adjustedTranslateX, -img.height / 2 - translateY, img.width, img.height);\n ctx.setTransform(1, 0, 0, 1, 0, 0);\n }\n}\n```\n\n### Explanation:\n- **`ctx.clearRect`**: Clears the canvas before drawing the new image.\n- **`ctx.translate`**: Moves the context to the center of the canvas for easier rotation and scaling.\n- **`ctx.scale`**: Scales the image size.\n- **`ctx.rotate`**: Rotates the image.\n- **`ctx.drawImage`**: Draws the image on the canvas with the applied transformations.\n- **`ctx.setTransform`**: Resets the transformation matrix to prevent cumulative transformations.\n\nWould you like to add any specific transformations or make any changes to the existing setup?","created_at":"2024-12-29T05:40:53.749948Z","output_tokens":619}],"assets":[{"name":"jacobHead","cloudinary_id":"lhyjpblq7c9a7cjdx5gc","resource_type":"image","id":24127,"project_id":3543,"created_at":"2024-10-10T18:10:48.296616Z","deleted":false}],"messages_sent":6,"comments":[{"content":"YA YA YA YAH","id":987,"user_id":192,"user":{"photo":null,"email":null,"recess_id":"cfb1457c-ce90-4d98-a6ed-7abb46cfc301","created_at":"2024-08-21T18:42:26.417915Z","reset_token":null,"stripe_customer_id":null,"seats":null,"username":"xamseygo","id":192,"password_hash":null,"updated_at":"2024-08-21T18:42:26.417918Z","reset_token_expiry":null,"subscription_status":null},"project_id":3543,"created_at":"2024-11-18T19:28:52.572019Z","updated_at":"2024-11-18T19:28:52.572020Z"}],"steps":[{"step_number":0,"complete":false,"updated_at":"2024-10-10T18:10:48.230230","id":10771,"title":"Upload Image","instruction":"Allow users to upload an image from their device.","created_at":"2024-05-06T16:56:03.764772","project_id":3543},{"step_number":1,"complete":false,"updated_at":"2024-10-10T18:10:48.230310","id":10772,"title":"Rotation Slider","instruction":"Implement a slider to rotate the uploaded image.","created_at":"2024-05-06T16:56:03.764828","project_id":3543},{"step_number":2,"complete":false,"updated_at":"2024-10-10T18:10:48.230355","id":10773,"title":"Translation Slider","instruction":"Incorporate a slider to translate the uploaded image.","created_at":"2024-05-06T16:56:03.764871","project_id":3543},{"step_number":3,"complete":false,"updated_at":"2024-10-10T18:10:48.230397","id":10774,"title":"Scale Slider","instruction":"Integrate a slider to scale the uploaded image.","created_at":"2024-05-06T16:56:03.764910","project_id":3543},{"step_number":4,"complete":false,"updated_at":"2024-10-10T18:10:48.230437","id":10775,"title":"Real-time Manipulation","instruction":"Use JavaScript to manipulate the image based on the slider values and display the changes in real time.","created_at":"2024-05-06T16:56:03.764950","project_id":3543},{"step_number":5,"complete":false,"updated_at":"2024-10-10T18:10:48.230476","id":10776,"title":"Reset Functionality","instruction":"Add an option to reset the image to its original state.","created_at":"2024-05-06T16:56:03.764989","project_id":3543},{"step_number":6,"complete":false,"updated_at":"2024-10-10T18:10:48.230518","id":10777,"title":"Color Picker","instruction":"Include a color picker to change the image color dynamically.","created_at":"2024-05-06T16:56:03.765027","project_id":3543},{"step_number":7,"complete":false,"updated_at":"2024-10-10T18:10:48.230558","id":10778,"title":"Filters and Effects","instruction":"Provide a button to apply filters or effects to the image.","created_at":"2024-05-06T16:56:03.765073","project_id":3543}]}