06/15 Phase 1 + 2 codes

app/services/field_schema.py

@@ -0,0 +1,75 @@
+"""Validate listing `attributes` against a category's `field_schema`.
+
+Returns (cleaned_attributes, errors). Caller rejects on any errors.
+Supported field types: text, number, select, bool.
+"""
+
+_HOT_COLUMNS = {"condition", "job_type", "salary_min", "salary_max"}
+
+
+class SchemaError(ValueError):
+    pass
+
+
+def validate_attributes(category, raw):
+    raw = raw or {}
+    cleaned, errors = {}, {}
+
+    for field in category.fields():
+        name = field["name"]
+        ftype = field.get("type", "text")
+        required = field.get("required", False)
+        val = raw.get(name)
+
+        if val in (None, "", []):
+            if required:
+                errors[name] = "required"
+            continue
+
+        try:
+            cleaned[name] = _coerce(field, ftype, val)
+        except SchemaError as e:
+            errors[name] = str(e)
+
+    return cleaned, errors
+
+
+def _coerce(field, ftype, val):
+    if ftype == "text":
+        s = str(val).strip()
+        mx = field.get("max", 255)
+        if len(s) > mx:
+            raise SchemaError(f"max length {mx}")
+        return s
+
+    if ftype == "number":
+        try:
+            n = int(val) if str(val).lstrip("-").isdigit() else float(val)
+        except (TypeError, ValueError):
+            raise SchemaError("must be a number")
+        if "min" in field and n < field["min"]:
+            raise SchemaError(f"min {field['min']}")
+        if "max" in field and n > field["max"]:
+            raise SchemaError(f"max {field['max']}")
+        return n
+
+    if ftype == "select":
+        opts = field.get("options", [])
+        if val not in opts:
+            raise SchemaError("invalid option")
+        return val
+
+    if ftype == "bool":
+        return bool(val) if isinstance(val, bool) else str(val).lower() in ("1", "true", "on", "yes")
+
+    raise SchemaError("unknown field type")
+
+
+def hot_values(cleaned):
+    """Map cleaned attributes -> denormalized Listing hot columns."""
+    return {
+        "attr_condition": cleaned.get("condition"),
+        "attr_job_type": cleaned.get("job_type"),
+        "attr_salary_min": cleaned.get("salary_min"),
+        "attr_salary_max": cleaned.get("salary_max"),
+    }