How does gravity affect light

My thinking, light doesn't have mass so how can gravity influence it? Then I thought maybe it's the photons because photons do have mass. Am I right or not even close?

everything in the universe moves in a straight line. but the curvature of space-time due to objects makes the straight lines bend.

light is a particle. therefore it is effected by the curves in space-time. however it takes a massive object to curve space-time enough to bend light particles because of their high speed.

black holes and whole galaxies are good examples of the kind of massive objects we are looking at.

galaxies actually produce a "lens effect" to where we can see other galaxies/stars behind them, but to us the other galaxies appear stretched around the first one. this is due to the curvature of space-time around the galaxy bends the light particles around it.

black holes are the only discovered thing in the universe that curves space-time enough to capture light. the black hole has what is called an event horizon. anything that crosses this imaginary line is captured by the black hole's massive curvature of space-time.

Gravity seems to bend, distort light depending on the mass within a given point in space. At a stellar or galactic black hole extreme gravity can even disintegrate light. Gravity actually acts upon energy, not just mass. Therefore even energy particles that do not have mass can be affected by gravity.

Light is moving in a straight line through curved spacetime. The curvature of spacetime is not visible to us but we feel it as gravity.

Gravity attracts light. Think about how black holes work. Because gravity is so high that light cannot escape the event horizon.