feat: add class to generate table CSVs

Author: MatMoore

home/service/details_csv.py

@@ -0,0 +1,51 @@
+from home.service.details import DatabaseDetailsService, DatasetDetailsService
+
+
+class DatasetDetailsCsvFormatter:
+    def __init__(self, details_service: DatasetDetailsService):
+        self.details_service = details_service
+
+    def data(self):
+        return [
+            (
+                column.name,
+                column.display_name,
+                column.is_primary_key,
+                column.type,
+                column.nullable,
+                column.description,
+            )
+            for column in self.details_service.table_metadata.column_details
+        ]
+
+    def headers(self):
+        return [
+            "name",
+            "display_name",
+            "is_primary_key",
+            "type",
+            "nullable",
+            "description",
+        ]
+
+
+class DatabaseDetailsCsvFormatter:
+    def __init__(self, details_service: DatabaseDetailsService):
+        self.details_service = details_service
+
+    def data(self):
+        return [
+            (
+                table.entity_ref.urn,
+                table.entity_ref.display_name,
+                table.description,
+            )
+            for table in self.details_service.entities_in_database
+        ]
+
+    def headers(self):
+        return [
+            "urn",
+            "display_name",
+            "description",
+        ]

lib/datahub-client/data_platform_catalogue/entities.py

@@ -265,7 +265,7 @@ class EntitySummary(BaseModel):
     )
     description: str = Field(description="A description of the entity")
     entity_type: str = Field(
-        description="indicates the tpye of entity that is summarised"
+        description="indicates the type of entity that is summarised"
     )
     tags: list[TagRef] = Field(description="Any tags associated with the entity")
 

tests/home/service/test_details_csv.py

@@ -0,0 +1,89 @@
+from unittest.mock import MagicMock
+
+from data_platform_catalogue.entities import Column, EntityRef, EntitySummary
+
+from home.service.details import DatabaseDetailsService, DatasetDetailsService
+from home.service.details_csv import (
+    DatabaseDetailsCsvFormatter,
+    DatasetDetailsCsvFormatter,
+)
+
+
+def test_dataset_details_csv_formatter(example_table):
+    details_service = MagicMock(spec=DatasetDetailsService)
+    columns = [
+        Column(
+            name="foo",
+            display_name="Foo",
+            type="string",
+            description="an example",
+            nullable=False,
+            is_primary_key=True,
+        ),
+        Column(
+            name="bar",
+            display_name="Bar",
+            type="integer",
+            description="another example",
+            nullable=True,
+            is_primary_key=False,
+        ),
+    ]
+    details_service.table_metadata = example_table
+    example_table.column_details = columns
+    csv_formatter = DatasetDetailsCsvFormatter(details_service)
+
+    assert csv_formatter.headers() == [
+        "name",
+        "display_name",
+        "is_primary_key",
+        "type",
+        "nullable",
+        "description",
+    ]
+    assert csv_formatter.data() == [
+        (
+            "foo",
+            "Foo",
+            True,
+            "string",
+            False,
+            "an example",
+        ),
+        (
+            "bar",
+            "Bar",
+            False,
+            "integer",
+            True,
+            "another example",
+        ),
+    ]
+
+
+def test_database_details_csv_formatter(example_database):
+    tables = [
+        EntitySummary(
+            entity_ref=EntityRef(display_name="foo", urn="urn:foo"),
+            description="an example",
+            entity_type="Table",
+            tags=[],
+        ),
+        EntitySummary(
+            entity_ref=EntityRef(display_name="bar", urn="urn:bar"),
+            description="another example",
+            entity_type="Table",
+            tags=[],
+        ),
+    ]
+
+    details_service = MagicMock(spec=DatabaseDetailsService)
+    details_service.entities_in_database = tables
+
+    csv_formatter = DatabaseDetailsCsvFormatter(details_service)
+
+    assert csv_formatter.headers() == ["urn", "display_name", "description"]
+    assert csv_formatter.data() == [
+        ("urn:foo", "foo", "an example"),
+        ("urn:bar", "bar", "another example"),
+    ]