From 99dabd3f2f81ffcf0b6f2b59e13ebb4502b2ccac Mon Sep 17 00:00:00 2001
From: "Adam T. Carpenter" <atc@53hor.net>
Date: Thu, 22 Oct 2020 17:44:38 -0400
Subject: Added product migration, better organization of DTOs, Entities, and
 Domain Models. Also made config loading/photo generation easier.

---
 dichroism/src/models/photo.rs     | 24 ++++++++++++-
 dichroism/src/models/photo_set.rs | 72 +++++++++++++++++++++++++++++++++++----
 dichroism/src/models/product.rs   | 26 ++++----------
 3 files changed, 95 insertions(+), 27 deletions(-)

(limited to 'dichroism/src/models')

diff --git a/dichroism/src/models/photo.rs b/dichroism/src/models/photo.rs
index 2e8b3bf..dee6288 100644
--- a/dichroism/src/models/photo.rs
+++ b/dichroism/src/models/photo.rs
@@ -1,5 +1,27 @@
+use crate::config::CONFIG_INSTANCE;
+use crate::error::DichroismError;
+use crate::result::Result;
+use image::DynamicImage;
+use std::path::PathBuf;
+use uuid::Uuid;
+
 #[derive(Debug, Queryable, Serialize, Clone)]
 pub struct Photo {
-    pub id: i32,
     pub path: String,
 }
+
+impl Photo {
+    pub fn from_image(image: &DynamicImage) -> Result<Self> {
+        let base_name = Uuid::new_v3(&Uuid::NAMESPACE_OID, &image.to_bytes())
+            .to_hyphenated()
+            .to_string();
+        let mut path = PathBuf::from(&CONFIG_INSTANCE.img_root);
+        path.push(base_name);
+        path.set_extension("jpg");
+        image.save(&path)?;
+
+        Ok(Self {
+            path: path.to_str().ok_or(DichroismError::ImageWrite)?.to_string(),
+        })
+    }
+}
diff --git a/dichroism/src/models/photo_set.rs b/dichroism/src/models/photo_set.rs
index 2f6c128..84fe0e1 100644
--- a/dichroism/src/models/photo_set.rs
+++ b/dichroism/src/models/photo_set.rs
@@ -1,8 +1,68 @@
-#[derive(Debug, Queryable, Clone)]
+use super::photo::Photo;
+use crate::constants::{PHOTO_BASE_XY, PHOTO_FULLSIZE_XY, PHOTO_THUMBNAIL_XY};
+use crate::error::DichroismError;
+use crate::result::Result;
+use base64::decode;
+use image::imageops::FilterType;
+use image::GenericImageView;
+use once_cell::sync::Lazy;
+use regex::Regex;
+
+static DATA_URI_RE: Lazy<Regex> = Lazy::new(|| {
+    Regex::new("^data:image/(png|jpeg);base64,(?P<data>.+)")
+        .expect("Couldn't parse data URI Regex.")
+});
+
 pub struct PhotoSet {
-    pub id: i32,
-    pub base: i32,
-    pub fullsize: i32,
-    pub thumbnail: i32,
-    pub original: i32,
+    pub original: Photo,  // original, just for safe-keeping
+    pub fullsize: Photo,  // full-size, "zoomed" view
+    pub base: Photo,      // basic viewing
+    pub thumbnail: Photo, // tiny, square thumbnail
+}
+
+impl PhotoSet {
+    pub fn from_data_uri(uri: &str) -> Result<Self> {
+        let data = DATA_URI_RE
+            .captures(uri)
+            .ok_or(DichroismError::UriDataExtract)?
+            .name("data")
+            .ok_or(DichroismError::UriDataExtract)?
+            .as_str();
+        let original = image::load_from_memory(&decode(data)?)?;
+        let fullsize = original.resize(PHOTO_FULLSIZE_XY, PHOTO_FULLSIZE_XY, FilterType::Lanczos3);
+        let base = original.resize(PHOTO_BASE_XY, PHOTO_BASE_XY, FilterType::Lanczos3);
+
+        let (width, height) = original.dimensions();
+        let thumbnail = if width > height {
+            let offset = (width - height) / 2;
+            original.crop_imm(offset, 0, width - offset * 2, height)
+        } else {
+            let offset = (height - width) / 2;
+            original.crop_imm(0, offset, width, height - offset * 2)
+        }
+        .resize(PHOTO_THUMBNAIL_XY, PHOTO_THUMBNAIL_XY, FilterType::Lanczos3);
+
+        Ok(Self {
+            original: Photo::from_image(&original)?,
+            fullsize: Photo::from_image(&fullsize)?,
+            base: Photo::from_image(&base)?,
+            thumbnail: Photo::from_image(&thumbnail)?,
+        })
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    //use super::*;
+
+    const TEST_DATA_URI: &str = include_str!("../unit_test_data/img_data_uri.txt");
+    const TEST_DATA_BASE64: &str = include_str!("../unit_test_data/test_data_base64.txt");
+
+    #[test]
+    fn test_gen_product_images() {
+        //        PhotoSet::from_data_uri(TEST_DATA_URI.trim())
+        //            .unwrap()
+        //            .commit(".")
+        //            .unwrap();
+    }
 }
diff --git a/dichroism/src/models/product.rs b/dichroism/src/models/product.rs
index 9b81b8a..be0a5ec 100644
--- a/dichroism/src/models/product.rs
+++ b/dichroism/src/models/product.rs
@@ -1,26 +1,12 @@
-#[derive(Debug, Clone, Queryable, Serialize)]
+use super::PhotoSet;
+
 pub struct Product {
-    pub id: i32,
+    pub id: u32,
     pub name: String,
-    pub quantity: i32,
-    pub cents: i32,
     pub description: String,
+    pub cents: u32,
+    pub quantity: u32,
     pub featured: bool,
-    pub category_path: String,
     pub photo_set: PhotoSet,
-}
-
-#[derive(Debug, Clone, Serialize)]
-pub struct PhotoSet {
-    pub id: i32,
-    pub base: i32,
-    pub fullsize: i32,
-    pub thumbnail: i32,
-    pub original: i32,
-}
-
-#[derive(Debug, Clone, Serialize)]
-pub struct Photo {
-    pub id: i32,
-    pub path: String,
+    pub category: String,
 }
-- 
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