1 files changed, 66 insertions, 6 deletions
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();
+    }
 }