Fix Slack block limit: send one message per campaign + error logging

- Refactor send_daily_report: summary in one message, each campaign in its own
  message — eliminates the 50-block Slack limit that was silently dropping campaigns
- _post now raises RuntimeError on Slack API errors (was silently returning None)
- send_slack_report.py accepts optional date argument (defaults to yesterday)

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

send_slack_report.py

@@ -17,7 +17,8 @@ def _extract_vertical(name: str) -> str:
 
 
 def main():
-    run_date = (datetime.now() - timedelta(days=1)).strftime("%Y-%m-%d")
+    import sys as _sys
+    run_date = _sys.argv[1] if len(_sys.argv) > 1 else (datetime.now() - timedelta(days=1)).strftime("%Y-%m-%d")
     print(f"Reenviando informe para {run_date}...")
 
     meta = MetaAdsClient()

slack_notifier.py

@@ -57,7 +57,10 @@ def _post(method: str, **payload) -> dict:
         json=payload,
         timeout=10,
     )
-    return resp.json()
+    data = resp.json()
+    if not data.get("ok"):
+        raise RuntimeError(f"Slack {method} error: {data.get('error')} — {data.get('response_metadata', {}).get('messages', '')}")
+    return data
 
 
 def update_message(channel: str, ts: str, text: str):
@@ -253,15 +256,23 @@ def send_daily_report(
         })
 
     blocks.append({"type": "divider"})
-
-    # ── Análisis por campaña: decisión + adsets + anuncios ────────────────────
-    if campaign_details:
     blocks.append({
-            "type": "section",
+        "type": "context",
-            "text": {"type": "mrkdwn",
+        "elements": [{"type": "mrkdwn",
-                     "text": f"*Análisis por campaña ({campaigns_analyzed} activas ayer)*"},
+                      "text": f"{campaigns_analyzed} campañas analizadas — detalle por campaña a continuación"}],
     })
-        # Build lookup: campaign_name → action info
+
+    # ── Enviar resumen ────────────────────────────────────────────────────────
+    result = _post(
+        "chat.postMessage",
+        channel=config.SLACK_CHANNEL_ID,
+        blocks=blocks,
+        text=f"Meta Optimizer — {prefix} — {date_label}",
+    )
+    ts = result.get("ts")
+
+    # ── Un mensaje por campaña (sin límite de bloques) ────────────────────────
+    if campaign_details:
         action_map = {a["campaign_name"]: a for a in actions}
 
         for cid, detail in campaign_details.items():
@@ -279,11 +290,9 @@ def send_daily_report(
             budget         = bid_cfg.get("daily_budget_eur")
             budget_str     = f"{budget:.0f}€/día" if budget else "—"
 
-            # Icono y etiqueta de acción
             atype = action["action_type"] if action else "MAINTAIN"
             emoji, alabel = _ACTION_DISPLAY.get(atype, ("⚪", atype))
 
-            # Campaign header
             header_text = (
                 f"{emoji} *{name}*\n"
                 f"Vertical: _{vertical}_ | Margen: *{m_str}* | "
@@ -291,25 +300,23 @@ def send_daily_report(
                 f"*Decisión: {alabel}*"
             )
             if action:
-                justification = action.get("justification", "")[:500]
+                header_text += f"\n_{action.get('justification', '')[:500]}_"
-                header_text += f"\n_{justification}_"
                 if action.get("alert"):
                     header_text += f"\n:warning: {action['alert']}"
 
-            blocks.append({
+            camp_blocks: list = [
-                "type": "section",
+                {"type": "section", "text": {"type": "mrkdwn", "text": header_text}},
-                "text": {"type": "mrkdwn", "text": header_text},
+            ]
-            })
 
-            # Botones solo para acciones que ejecutan algo en Meta API
+            # Botones de acción a nivel campaña
             if action and atype in _ACTIONABLE:
                 effect = _effect_text(action, budget)
                 if effect:
-                    blocks.append({
+                    camp_blocks.append({
                         "type": "section",
                         "text": {"type": "mrkdwn", "text": effect},
                     })
-                blocks.append({
+                camp_blocks.append({
                     "type": "actions",
                     "elements": [
                         {
@@ -330,48 +337,26 @@ def send_daily_report(
                 })
 
             # Tabla adsets + anuncios
-            detail_parts = []
             adset_table = _adset_ad_table(adsets, "Conjuntos de anuncios", show_bid=True)
             ad_table    = _adset_ad_table(ads, "Anuncios")
-            if adset_table:
+            combined    = "\n\n".join(filter(None, [adset_table, ad_table]))
-                detail_parts.append(adset_table)
-            if ad_table:
-                detail_parts.append(ad_table)
-            if detail_parts:
-                combined = "\n\n".join(detail_parts)
             for chunk in [combined[i:i+2900] for i in range(0, len(combined), 2900)]:
-                    blocks.append({
+                camp_blocks.append({
                     "type": "section",
                     "text": {"type": "mrkdwn", "text": chunk},
                 })
 
-            # Botones de pausa por anuncio (solo los que Claude recomienda pausar)
+            # Botones de pausa por anuncio
-            blocks.extend(_ad_action_blocks(ads))
+            camp_blocks.extend(_ad_action_blocks(ads))
 
-            blocks.append({"type": "divider"})
+            _post(
-
-            if len(blocks) >= 45:  # Safety margin before Slack's 50-block limit
-                blocks.append({
-                    "type": "section",
-                    "text": {"type": "mrkdwn",
-                             "text": "_... más campañas disponibles en Baserow._"},
-                })
-                break
-
-    # ── Pie ───────────────────────────────────────────────────────────────────
-    blocks.append({
-        "type": "context",
-        "elements": [{"type": "mrkdwn",
-                      "text": f"{campaigns_analyzed} campañas analizadas ayer"}],
-    })
-
-    result = _post(
                 "chat.postMessage",
                 channel=config.SLACK_CHANNEL_ID,
-        blocks=blocks,
+                blocks=camp_blocks,
-        text=f"Meta Optimizer — {prefix} — {date_label}",
+                text=name,
             )
-    return result.get("ts") if result.get("ok") else None
+
+    return ts
 
 
 def send_execution_summary(log: dict):