From 3590af351edbed5f1554f784c7cf5d205e6ecdf2 Mon Sep 17 00:00:00 2001
From: vincentsarago <vincent.sarago@gmail.com>
Date: Tue, 7 Sep 2021 17:08:19 +0200
Subject: [PATCH 1/3] update fastapi max version

---
 src/titiler/core/setup.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/titiler/core/setup.py b/src/titiler/core/setup.py
index 21519a6a1..263cb4dc7 100644
--- a/src/titiler/core/setup.py
+++ b/src/titiler/core/setup.py
@@ -6,7 +6,7 @@
     long_description = f.read()
 
 inst_reqs = [
-    "fastapi>=0.65,<0.66",
+    "fastapi>=0.65,<0.68",
     "geojson-pydantic",
     "jinja2>=2.11.2,<3.0.0",
     "morecantile",

From d73d66b413e148e062c82b82026c9b31a3daa00b Mon Sep 17 00:00:00 2001
From: vincentsarago <vincent.sarago@gmail.com>
Date: Tue, 7 Sep 2021 17:09:21 +0200
Subject: [PATCH 2/3] add asset_expression in depdencies

---
 CHANGES.md                                    |  7 +++++++
 src/titiler/core/tests/test_factories.py      |  9 +++++++++
 src/titiler/core/titiler/core/dependencies.py | 18 ++++++++++++++++--
 3 files changed, 32 insertions(+), 2 deletions(-)

diff --git a/CHANGES.md b/CHANGES.md
index 5a6479d82..33a5fe48f 100644
--- a/CHANGES.md
+++ b/CHANGES.md
@@ -1,5 +1,12 @@
 # Release Notes
 
+## 0.3.9 (2021-09-07)
+
+### titiler.core
+
+- update FastAPI requirements to `>=0.65,<0.68` (ref: https://github.com/developmentseed/titiler/issues/366)
+- surface `asset_expression` and `band_expression` in Multi*TilerFactory (ref: https://github.com/developmentseed/titiler/issues/367)
+
 ## 0.3.8 (2021-09-02)
 
 ### titiler.core
diff --git a/src/titiler/core/tests/test_factories.py b/src/titiler/core/tests/test_factories.py
index eb55d5af5..02a481e03 100644
--- a/src/titiler/core/tests/test_factories.py
+++ b/src/titiler/core/tests/test_factories.py
@@ -545,6 +545,15 @@ def test_MultiBaseTilerFactory(rio):
     assert meta["dtype"] == "int32"
     assert meta["count"] == 3
 
+    response = client.get(
+        f"/preview.tif?url={DATA_DIR}/item.json&assets=B01&asset_expression=b1,b1,b1&return_mask=false"
+    )
+    assert response.status_code == 200
+    assert response.headers["content-type"] == "image/tiff; application=geotiff"
+    meta = parse_img(response.content)
+    assert meta["dtype"] == "int32"
+    assert meta["count"] == 3
+
     # GET - statistics
     response = client.get(f"/statistics?url={DATA_DIR}/item.json&assets=B01,B09")
     assert response.status_code == 200
diff --git a/src/titiler/core/titiler/core/dependencies.py b/src/titiler/core/titiler/core/dependencies.py
index 47cd4e8cc..f9f9d73cc 100644
--- a/src/titiler/core/titiler/core/dependencies.py
+++ b/src/titiler/core/titiler/core/dependencies.py
@@ -157,11 +157,16 @@ class AssetsBidxExprParams(DefaultDependency):
     expression: Optional[str] = Query(
         None,
         title="Band Math expression",
-        description="rio-tiler's band math expression (e.g B1/B2)",
+        description="rio-tiler's band math expression between assets (e.g asset1/asset2)",
     )
     bidx: Optional[str] = Query(
         None, title="Band indexes", description="comma (',') delimited band indexes",
     )
+    asset_expression: Optional[str] = Query(
+        None,
+        title="Band Math expression to apply to each asset",
+        description="rio-tiler's band math expression (e.g b1/b2)",
+    )
 
     def __post_init__(self):
         """Post Init."""
@@ -174,6 +179,8 @@ def __post_init__(self):
             self.kwargs["assets"] = self.assets.split(",")
         if self.expression is not None:
             self.kwargs["expression"] = self.expression
+        if self.asset_expression is not None:
+            self.kwargs["asset_expression"] = self.asset_expression
         if self.bidx is not None:
             self.kwargs["indexes"] = tuple(
                 int(s) for s in re.findall(r"\d+", self.bidx)
@@ -204,7 +211,12 @@ class BandsExprParams(DefaultDependency):
     expression: Optional[str] = Query(
         None,
         title="Band Math expression",
-        description="rio-tiler's band math expression.",
+        description="rio-tiler's band math expression between Band asset.",
+    )
+    band_expression: Optional[str] = Query(
+        None,
+        title="Band Math expression",
+        description="rio-tiler's band math expression to apply to each band file.",
     )
 
     def __post_init__(self):
@@ -218,6 +230,8 @@ def __post_init__(self):
             self.kwargs["bands"] = self.bands.split(",")
         if self.expression is not None:
             self.kwargs["expression"] = self.expression
+        if self.band_expression is not None:
+            self.kwargs["band_expression"] = self.band_expression
 
 
 @dataclass

From 5085bcd0f997ef64338d64a9a81a9bc2a8ef4d84 Mon Sep 17 00:00:00 2001
From: vincentsarago <vincent.sarago@gmail.com>
Date: Tue, 7 Sep 2021 17:24:21 +0200
Subject: [PATCH 3/3] add tests for multiBand

---
 src/titiler/core/tests/test_factories.py | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/src/titiler/core/tests/test_factories.py b/src/titiler/core/tests/test_factories.py
index 02a481e03..770cfd0eb 100644
--- a/src/titiler/core/tests/test_factories.py
+++ b/src/titiler/core/tests/test_factories.py
@@ -653,6 +653,15 @@ def test_MultiBandTilerFactory():
     assert meta["dtype"] == "int32"
     assert meta["count"] == 3
 
+    response = client.get(
+        f"/preview.tif?url={DATA_DIR}&bands=B01&band_expression=b1,b1,b1&return_mask=false"
+    )
+    assert response.status_code == 200
+    assert response.headers["content-type"] == "image/tiff; application=geotiff"
+    meta = parse_img(response.content)
+    assert meta["dtype"] == "int32"
+    assert meta["count"] == 3
+
     # GET - statistics
     response = client.get(f"/statistics?url={DATA_DIR}&bands=B01,B09")
     assert response.status_code == 200