From b09be729863f8860b1b81b1498ff325a2a08d36b Mon Sep 17 00:00:00 2001
From: Bryan Newbold <bnewbold@robocracy.org>
Date: Wed, 24 Nov 2021 15:09:06 -0800
Subject: initial implementation of container merger

---
 python/fatcat_tools/mergers/containers.py | 237 ++++++++++++++++++++++++++++++
 python/tests/merge_containers.py          | 116 +++++++++++++++
 2 files changed, 353 insertions(+)
 create mode 100644 python/fatcat_tools/mergers/containers.py
 create mode 100644 python/tests/merge_containers.py

diff --git a/python/fatcat_tools/mergers/containers.py b/python/fatcat_tools/mergers/containers.py
new file mode 100644
index 00000000..4bdafe1b
--- /dev/null
+++ b/python/fatcat_tools/mergers/containers.py
@@ -0,0 +1,237 @@
+import argparse
+import os
+import sys
+from typing import Any, Dict, List, Optional
+
+import fatcat_openapi_client
+from fatcat_openapi_client.models import ContainerEntity
+
+from fatcat_tools import authenticated_api
+from fatcat_tools.harvest.harvest_common import requests_retry_session
+from fatcat_tools.importers import JsonLinePusher
+
+from .common import EntityMerger
+
+
+class ContainerMerger(EntityMerger):
+    """
+    Combines container entities into a single primary. Does not merge partial
+    metadata (identifiers, etc). Can chose "primary" container to redirect to,
+    if necessary.
+
+    The `max_container_releases` argument (int or None) can be used to
+    prevent redirecting containers which already have releases pointed at them
+    (based on release ES index stats). If set to 0, no releases are allowed. If
+    set to None (or a negative number), the parameter is ignored.
+
+    The `clobber_human_edited` flag (boolean) can be used to allow updating
+    entities even if they have had human edits in the past.
+
+    This merger makes external HTTP requests to fatcat.wiki, for the purpose of
+    fetching release stats.
+    """
+
+    def __init__(self, api: fatcat_openapi_client.ApiClient, **kwargs) -> None:
+
+        eg_desc = (
+            kwargs.pop("editgroup_description", None) or "Automated merge of container entities"
+        )
+        eg_extra = kwargs.pop("editgroup_extra", dict())
+        eg_extra["agent"] = eg_extra.get("agent", "fatcat_tools.ContainerMerger")
+        self.dry_run_mode: bool = eg_extra.get("dry_run_mode", False)
+        self.clobber_human_edited: bool = eg_extra.get("clobber_human_edited", False)
+        self.max_container_releases: Optional[int] = eg_extra.get("max_container_releases", 0)
+        if self.max_container_releases and self.max_container_releases < 0:
+            self.max_container_releases = None
+        super().__init__(api, editgroup_description=eg_desc, editgroup_extra=eg_extra, **kwargs)
+        self.entity_type_name = "container"
+        self.http_session = requests_retry_session()
+
+    def choose_primary_container(
+        self,
+        entities: List[ContainerEntity],
+        redirects: Dict[str, List[str]],
+        release_counts: Dict[str, int],
+    ) -> str:
+        assert entities and len(entities) >= 2
+
+        # want to sort in descending order, so reverse=True
+        entities = sorted(
+            entities,
+            key=lambda a: (
+                # linked release counts
+                release_counts[a.ident],
+                # number of redirected entities
+                len(redirects[a.ident]),
+                # not a stub
+                bool(a.container_type != "stub"),
+                # has a strong identifier?
+                bool(a.issnl or (a.extra and a.extra.get("dblp"))),
+                # has IA sim metadata?
+                bool(a.extra and a.extra.get("ia")),
+                # has additional metadata?
+                bool(a.publication_status or a.container_type),
+                bool(a.extra),
+            ),
+            reverse=True,
+        )
+        return entities[0].ident
+
+    def try_merge(
+        self,
+        dupe_ids: List[str],
+        primary_id: Optional[str] = None,
+        evidence: Optional[Dict[str, Any]] = None,
+    ) -> int:
+
+        # currently required for extid validation
+        if not evidence or not (evidence.get("extid_type") and evidence.get("extid")):
+            self.counts["skip-missing-evidence"] += 1
+            return 0
+
+        updated_entities = 0
+        entities: Dict[str, ContainerEntity] = dict()
+        redirects: Dict[str, List[str]] = dict()
+        release_counts: Dict[str, int] = dict()
+        eg_id = self.get_editgroup_id()
+
+        all_ids = dupe_ids.copy()
+        if primary_id:
+            all_ids.append(primary_id)
+        for ident in all_ids:
+            try:
+                entities[ident] = self.api.get_container(ident)
+                redirects[ident] = self.api.get_container_redirects(ident)
+            except fatcat_openapi_client.ApiException as ae:
+                if ae.status == 404:
+                    self.counts["skip-entity-not-found"] += 1
+                    return 0
+                else:
+                    raise
+            if entities[ident].state != "active":
+                self.counts["skip-not-active-entity"] += 1
+                return 0
+            if getattr(entities[ident], evidence["extid_type"]) != evidence["extid"]:
+                self.counts["skip-extid-mismatch"] += 1
+                return 0
+            if not self.clobber_human_edited:
+                edit_history = self.api.get_container_history(ident)
+                for edit in edit_history:
+                    if edit.editor.is_bot is not True:
+                        self.counts["skip-human-edited"] += 1
+                        return 0
+            resp = self.http_session.get("https://fatcat.wiki/container/{ident}/stats.json")
+            resp.raise_for_status()
+            stats = resp.json()
+            release_counts[ident] = stats["total"]
+            if self.max_container_releases is not None:
+                if release_counts[ident] > self.max_container_releases:
+                    self.counts["skip-container-release-count"] += 1
+                    continue
+
+        if not primary_id:
+            primary_id = self.choose_primary_container(
+                list(entities.values()), redirects, release_counts
+            )
+            dupe_ids = [d for d in dupe_ids if d != primary_id]
+
+        assert primary_id not in dupe_ids
+
+        primary = entities[primary_id]
+        for other_id in dupe_ids:
+            other = entities[other_id]
+            if not self.dry_run_mode:
+                self.api.update_container(
+                    eg_id,
+                    other.ident,
+                    ContainerEntity(
+                        redirect=primary.ident,
+                        edit_extra=evidence,
+                    ),
+                )
+            updated_entities += 1
+
+        return updated_entities
+
+
+def run_merge_containers(args: argparse.Namespace) -> None:
+    em = ContainerMerger(
+        args.api,
+        edit_batch_size=args.batch_size,
+        dry_run_mode=args.dry_run,
+        max_container_releases=args.max_container_releases,
+        clobber_human_edited=args.clobber_human_edited,
+        editgroup_description=args.editgroup_description_override,
+    )
+    JsonLinePusher(em, args.json_file).run()
+
+
+def main() -> None:
+    """
+    Invoke like:
+
+        python3 -m fatcat_tools.mergers.containers [options]
+    """
+    parser = argparse.ArgumentParser()
+    parser.add_argument(
+        "--host-url", default="http://localhost:9411/v0", help="connect to this host/port"
+    )
+    parser.add_argument("--batch-size", help="size of batch to send", default=50, type=int)
+    parser.add_argument(
+        "--editgroup-description-override",
+        help="editgroup description override",
+        default=None,
+        type=str,
+    )
+    parser.add_argument(
+        "--dry-run",
+        action="store_true",
+        help="don't actually commit merges, just count what would have been",
+    )
+    parser.set_defaults(
+        auth_var="FATCAT_AUTH_API_TOKEN",
+    )
+    subparsers = parser.add_subparsers()
+
+    sub_merge_containers = subparsers.add_parser("merge-containers")
+    sub_merge_containers.set_defaults(func=run_merge_containers)
+    sub_merge_containers.add_argument(
+        "json_file",
+        help="source of merge lines to process (or stdin)",
+        default=sys.stdin,
+        type=argparse.FileType("r"),
+    )
+    parser.add_argument(
+        "--clobber-human-edited",
+        action="store_true",
+        help="if set, entities which have non-bot (human) edits can be updated/redirected",
+    )
+    parser.add_argument(
+        "--max-container-releases",
+        default=0,
+        type=int,
+        help="if container has more than this many releases linked, don't update (set to -1 to disable limit)",
+    )
+
+    args = parser.parse_args()
+    if not args.__dict__.get("func"):
+        print("tell me what to do!")
+        sys.exit(-1)
+
+    # allow editgroup description override via env variable (but CLI arg takes
+    # precedence)
+    if not args.editgroup_description_override and os.environ.get(
+        "FATCAT_EDITGROUP_DESCRIPTION"
+    ):
+        args.editgroup_description_override = os.environ.get("FATCAT_EDITGROUP_DESCRIPTION")
+
+    args.api = authenticated_api(
+        args.host_url,
+        # token is an optional kwarg (can be empty string, None, etc)
+        token=os.environ.get(args.auth_var),
+    )
+    args.func(args)
+
+
+if __name__ == "__main__":
+    main()
diff --git a/python/tests/merge_containers.py b/python/tests/merge_containers.py
new file mode 100644
index 00000000..a657522e
--- /dev/null
+++ b/python/tests/merge_containers.py
@@ -0,0 +1,116 @@
+from fatcat_openapi_client import ContainerEntity
+from fixtures import api
+
+from fatcat_tools.mergers.containers import ContainerMerger
+
+
+def test_choose_primary_container(api) -> None:
+
+    release_counts = dict()
+    redirects = dict()
+    em = ContainerMerger(api=api)
+
+    ce_stub = ContainerEntity(
+        ident="pppppp5apzfhbbxxc7rgu2yw6m",
+        name="dummy journal",
+    )
+    release_counts[ce_stub.ident] = 0
+    redirects[ce_stub.ident] = []
+
+    ce_partial = ContainerEntity(
+        ident="eeeeeeeapzfhbbxxc7rgu2yw6m",
+        name="dummy complete journal",
+        publisher="some publisher",
+        issnl="1234-5678",
+        publication_status="active",
+        extra=dict(asdf=123, ia=dict(asdf=True)),
+    )
+    release_counts[ce_partial.ident] = 0
+    redirects[ce_partial.ident] = []
+
+    ce_partial_redirects = ContainerEntity(
+        ident="rrrrrrrrrrfhbbxxc7rgu2yw6m",
+        name="dummy complete journal",
+        publisher="some publisher",
+        issnl="1234-5678",
+        publication_status="active",
+        extra=dict(asdf=123, ia=dict(asdf=True)),
+    )
+    release_counts[ce_partial_redirects.ident] = 0
+    redirects[ce_partial_redirects.ident] = [
+        "zzzzzzzzrrfhbbxxc7rgu2yw6m",
+    ]
+
+    ce_complete_zero = ContainerEntity(
+        ident="oooooooapzfhbbxxc7rgu2yw6m",
+        name="dummy complete journal",
+        publisher="some publisher",
+        issnl="1234-5678",
+        publication_status="active",
+        extra=dict(asdf=123, ia=dict(asdf=True)),
+    )
+    release_counts[ce_complete_zero.ident] = 0
+    redirects[ce_complete_zero.ident] = []
+
+    ce_complete_small = ContainerEntity(
+        ident="cccccccapzfhbbxxc7rgu2yw6m",
+        name="dummy complete journal",
+        publisher="some publisher",
+        issnl="1234-5678",
+        publication_status="active",
+        extra=dict(asdf=123, ia=dict(asdf=True)),
+    )
+    release_counts[ce_complete_small.ident] = 10
+    redirects[ce_complete_small.ident] = []
+
+    ce_complete_big = ContainerEntity(
+        ident="ddddddddpzfhbbxxc7rgu2yw6m",
+        name="dummy complete journal",
+        publisher="some publisher",
+        issnl="1234-5678",
+        publication_status="active",
+        extra=dict(asdf=123, ia=dict(asdf=True)),
+    )
+    release_counts[ce_complete_big.ident] = 9999999
+    redirects[ce_complete_big.ident] = []
+
+    assert (
+        em.choose_primary_container([ce_stub, ce_partial], redirects, release_counts)
+        == ce_partial.ident
+    )
+    assert (
+        em.choose_primary_container(
+            [ce_stub, ce_complete_zero, ce_partial], redirects, release_counts
+        )
+        == ce_complete_zero.ident
+    )
+    assert (
+        em.choose_primary_container(
+            [ce_stub, ce_partial_redirects, ce_complete_zero, ce_partial],
+            redirects,
+            release_counts,
+        )
+        == ce_partial_redirects.ident
+    )
+    assert (
+        em.choose_primary_container(
+            [ce_stub, ce_complete_zero, ce_complete_small, ce_partial],
+            redirects,
+            release_counts,
+        )
+        == ce_complete_small.ident
+    )
+    assert (
+        em.choose_primary_container(
+            [ce_stub, ce_complete_big, ce_complete_zero, ce_complete_small, ce_partial],
+            redirects,
+            release_counts,
+        )
+        == ce_complete_big.ident
+    )
+    assert (
+        em.choose_primary_container(
+            [ce_complete_small, ce_complete_big], redirects, release_counts
+        )
+        == ce_complete_big.ident
+    )
-- 
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