damus

commit cdacbcfdca3b255876c154dc87a4b51fdc51aada
parent 41e036cff23be8ae41d9e6c736d6ca2a4cd6942d
Author: Suhail Saqan <suhail.saqan@gmail.com>
Date:   Tue, 19 Sep 2023 13:24:11 -0700

util: add ImageResizer to change size of images

Diffstat:
M
damus.xcodeproj/project.pbxproj
 | 
12
++++++++++++
A
damus/Models/Camera/ImageResizer.swift
 | 
40
++++++++++++++++++++++++++++++++++++++++

2 files changed, 52 insertions(+), 0 deletions(-)
diff --git a/damus.xcodeproj/project.pbxproj b/damus.xcodeproj/project.pbxproj
@@ -415,6 +415,7 @@
 		9609F058296E220800069BF3 /* BannerImageView.swift in Sources */ = {isa = PBXBuildFile; fileRef = 9609F057296E220800069BF3 /* BannerImageView.swift */; };
 		9C83F89329A937B900136C08 /* TextViewWrapper.swift in Sources */ = {isa = PBXBuildFile; fileRef = 9C83F89229A937B900136C08 /* TextViewWrapper.swift */; };
 		9CA876E229A00CEA0003B9A3 /* AttachMediaUtility.swift in Sources */ = {isa = PBXBuildFile; fileRef = 9CA876E129A00CE90003B9A3 /* AttachMediaUtility.swift */; };
+		BA37598A2ABCCDE40018D73B /* ImageResizer.swift in Sources */ = {isa = PBXBuildFile; fileRef = BA3759892ABCCDE30018D73B /* ImageResizer.swift */; };
 		BA4AB0AE2A63B9270070A32A /* AddEmojiView.swift in Sources */ = {isa = PBXBuildFile; fileRef = BA4AB0AD2A63B9270070A32A /* AddEmojiView.swift */; };
 		BA4AB0B02A63B94D0070A32A /* EmojiListItemView.swift in Sources */ = {isa = PBXBuildFile; fileRef = BA4AB0AF2A63B94D0070A32A /* EmojiListItemView.swift */; };
 		BA693074295D649800ADDB87 /* UserSettingsStore.swift in Sources */ = {isa = PBXBuildFile; fileRef = BA693073295D649800ADDB87 /* UserSettingsStore.swift */; };
@@ -1094,6 +1095,7 @@
 		9609F057296E220800069BF3 /* BannerImageView.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = BannerImageView.swift; sourceTree = "<group>"; };
 		9C83F89229A937B900136C08 /* TextViewWrapper.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = TextViewWrapper.swift; sourceTree = "<group>"; };
 		9CA876E129A00CE90003B9A3 /* AttachMediaUtility.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = AttachMediaUtility.swift; sourceTree = "<group>"; };
+		BA3759892ABCCDE30018D73B /* ImageResizer.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = ImageResizer.swift; sourceTree = "<group>"; };
 		BA4AB0AD2A63B9270070A32A /* AddEmojiView.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = AddEmojiView.swift; sourceTree = "<group>"; };
 		BA4AB0AF2A63B94D0070A32A /* EmojiListItemView.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = EmojiListItemView.swift; sourceTree = "<group>"; };
 		BA693073295D649800ADDB87 /* UserSettingsStore.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = UserSettingsStore.swift; sourceTree = "<group>"; };
@@ -1239,6 +1241,7 @@
 		4C0A3F8D280F63FF000448DE /* Models */ = {
 			isa = PBXGroup;
 			children = (
+				BA3759882ABCCDE30018D73B /* Camera */,
 				4C190F1E2A535FC200027FD5 /* Zaps */,
 				4C54AA0829A55416003E4487 /* Notifications */,
 				3AA247FC297E3CFF0090C62D /* RepostsModel.swift */,
@@ -2251,6 +2254,14 @@
 			path = Extensions;
 			sourceTree = "<group>";
 		};
+		BA3759882ABCCDE30018D73B /* Camera */ = {
+			isa = PBXGroup;
+			children = (
+				BA3759892ABCCDE30018D73B /* ImageResizer.swift */,
+			);
+			path = Camera;
+			sourceTree = "<group>";
+		};
 		F71694E82A66221E001F4053 /* Onboarding */ = {
 			isa = PBXGroup;
 			children = (
@@ -2794,6 +2805,7 @@
 				4C3BEFDA281DCA1400B3DE84 /* LikeCounter.swift in Sources */,
 				4C32B9502A9AD44700DC3548 /* FlatBufferBuilder.swift in Sources */,
 				50A60D142A28BEEE00186190 /* RelayLog.swift in Sources */,
+				BA37598A2ABCCDE40018D73B /* ImageResizer.swift in Sources */,
 				4CB88389296AF99A00DC99E7 /* EventDetailBar.swift in Sources */,
 				4C32B9512A9AD44700DC3548 /* FlatbuffersErrors.swift in Sources */,
 				4CE8794E2996B16A00F758CC /* RelayToggle.swift in Sources */,
diff --git a/damus/Models/Camera/ImageResizer.swift b/damus/Models/Camera/ImageResizer.swift
@@ -0,0 +1,40 @@
+//
+//  ImageResizer.swift
+//  damus
+//
+//  Created by Suhail Saqan on 8/5/23.
+//
+
+import Foundation
+import UIKit
+
+public enum ImageResizingError: Error {
+    case cannotRetrieveFromURL
+    case cannotRetrieveFromData
+}
+
+public struct ImageResizer {
+    public var targetWidth: CGFloat
+
+    public init(targetWidth: CGFloat) {
+        self.targetWidth = targetWidth
+    }
+
+    public func resize(at url: URL) -> UIImage? {
+        guard let image = UIImage(contentsOfFile: url.path) else {
+            return nil
+        }
+
+        return self.resize(image: image)
+    }
+
+    public func resize(image: UIImage) -> UIImage {
+        let originalSize = image.size
+        let targetSize = CGSize(width: targetWidth, height: targetWidth*originalSize.height/originalSize.width)
+        let renderer = UIGraphicsImageRenderer(size: targetSize)
+        return renderer.image { (context) in
+            image.draw(in: CGRect(origin: .zero, size: targetSize))
+        }
+    }
+}
+