Render temporary barcodes for dewars (#6)

Author: gfrn

src/scaup/assets/text.py

@@ -1,6 +1,10 @@
 LABEL_INSTRUCTIONS_STEP_1 = (
     "Print tracking labels, and affix one of them to the dewar. If you're sending multiple "
     + "dewars, ensure the dewar code on the label matches the dewar code on the dewar."
+    + "\n\nIf a dewar doesn't have a barcode (such as the ones on the last page) already, cut out "
+    + "the barcode on the last page and affix it to the dewar. If you're sending multiple dewars, ensure "
+    + "the dewar matches the barcode you've selected for it previously. \n\nIgnore the last page if "
+    + "you already have barcodes on your dewars."
 )
 
 LABEL_INSTRUCTIONS_STEP_2 = "Affix the other label to the dewar case"
@@ -16,3 +20,7 @@
     + "returned to your institution. \nWhen you receive your dewar, feel free to discard any labels from the "
     + "previous steps."
 )
+
+TEMPORARY_DEWAR_TEXT = (
+    "FOR STAFF: This is a temporary barcode. Replace it with a permanent sticker before the end of the visit."
+)

src/scaup/crud/pdf.py

@@ -14,6 +14,7 @@
     LABEL_INSTRUCTIONS_STEP_2,
     LABEL_INSTRUCTIONS_STEP_3,
     LABEL_INSTRUCTIONS_STEP_4,
+    TEMPORARY_DEWAR_TEXT,
 )
 
 from ..assets.paths import (
@@ -165,6 +166,25 @@ def add_instruction_text(self, text: str):
             new_y="NEXT",
         )
 
+    def add_barcodes(self, dewars: List[Row]):
+        for i, dewar in enumerate(dewars):
+            if i % 4 == 0:
+                y_pos = 10
+                self.add_page()
+
+            self.code39("*" + dewar.code + "*", x=35, y=y_pos, w=2, h=25)
+
+            self.set_y(y_pos + 26)
+            self.set_font("helvetica", size=26, style="B")
+            self.cell(w=0, text=dewar.code, align="C", new_y="NEXT", new_x="LMARGIN")
+
+            self.set_font("helvetica", size=16, style="B")
+            self.multi_cell(w=0, text=TEMPORARY_DEWAR_TEXT, align="C")
+
+            self.image(CUT_HERE, x="L", y=y_pos + 55, w=194)
+
+            y_pos += 70
+
     def add_dewar(self, dewar: Row):
         if dewar.barCode is None or dewar.externalId is None:
             raise HTTPException(
@@ -313,6 +333,8 @@ def get_shipping_labels(shipment_id: int, token: str):
     for dewar in data:
         pdf.add_dewar(dewar)
 
+    pdf.add_barcodes(data)
+
     headers = {
         "Content-Disposition": (
             "inline;"