add sample data using HIV dataset (#176)

* add sample data using HIV dataset

* use new zenodo entry

src/blik/napari.yaml

@@ -7,6 +7,10 @@ contributions:
     - id: blik.read_files
       python_name: blik.reader:get_reader
       title: "Open files with blik"
+    # samples
+    - id: blik.sample_hiv_dataset
+      python_name: blik.remote_data:load_hiv_dataset
+      title: "Open sample HIV VLPs dataset"
     # writers
     - id: blik.write_image
       python_name: blik.writer:write_image
@@ -135,3 +139,8 @@ contributions:
       display_name: "Gaussian filter"
     - command: blik.power_spectrum
       display_name: "Power spectrum"
+
+  sample_data:
+    - command: blik.sample_hiv_dataset
+      key: blik_hiv_dataset
+      display_name: "Tomogram and particles of HIV VLPs"

src/blik/remote_data.py

@@ -0,0 +1,25 @@
+import pooch
+
+from .reader import read_layers
+
+
+def load_hiv_dataset():
+    reg_tomo = pooch.create(
+        path=pooch.os_cache("blik"),
+        base_url="doi:10.5281/zenodo.6504891/",
+    )
+    reg_tomo.load_registry_from_doi()
+
+    # made separate zenodo entry for star file with pixel size
+    reg_picks = pooch.create(
+        path=pooch.os_cache("blik"),
+        base_url="doi:10.5281/zenodo.12743309/",
+    )
+    reg_picks.load_registry_from_doi()
+
+    paths = [
+        reg_tomo.fetch("01_10.00Apx.mrc"),
+        reg_picks.fetch("01_10.00Apx.star"),
+    ]
+
+    return read_layers(*paths)